• Blog
  • Everything you need to know about types of Gas Boilers in 2022 & Choose the Best System for Your Home

    • home
    • Blog
    • Everything you need to know about types of Gas Boilers in 2022 & Choose the Best System for Your Home

  • Blog
  • Everything you need to know about types of Gas Boilers in 2022 & Choose the Best System for Your Home

    • home
    • Blog
    • Everything you need to know about types of Gas Boilers in 2022 & Choose the Best System for Your Home

    Updated: March 11, 2023

    Table of Contents

    What are the Different Types Of Boiler Systems in 2022?

    There are four main types of boilers or heating systems that we recommend and install at Let’s Heat:

    1. The Common, Heat Only Boiler
    2. System Boiler
    3. Combi Boiler, Condensing Boilers
    4. The new Heat Pumps!

    There are also three different types of boiler installation:

    1. Straight Swap
    2. Boiler Relocation
    3. System Upgrade

    We have compiled a list of the top boilers, boiler brands and boiler pricing for each of the different types for you to view here:

    Learn more about our additional article on the different types of boiler installation below the 4 articles on the different types of boilers:

    1. Heat Only Boilers Brands & Prices:

    Heat Only or common boilers cost from approx £500 to £2000 dependent on the brand and the size of the model etc. These common boilers, are a traditional domestic boiler type, which were often found in all homes in the UK that were  built before 1970.

    2. Where its located:

    The heat only boilers directly provide heating and hot water from a storage cylinder, usually situated in the airing cupboard. The boiler is fed by a cold water cistern from above (usually the attic), via gravity. The expansion cistern is separate so this boiler system requires a reasonable amount of space.

    3. Prices:

    The Heat only boilers vary greatly in price dependant on the brand in question, with models usually starting at £500, and reaching up to £2000 for some makes and models. Everything you need to know about Boilers.

    Heat Only Boiler Brands & Prices…

    • WORCESTER BOSCH GREENSTAR UTILITY 50 – 70 (OIL) – Typical Price – £1,700 – £1,900
    • WB GREENSTAR FS 42CDI REGULAR – Typical Price – £1,500-£1700
    • WORCESTER BOSCH GREENSTAR 30CDI REGULAR – Typical Price -£1,200-£1,300
    • VAILLANT ECOTEC PLUS 428 – Typical Price – £800 – £900
    • VAILLANT ECOTEC PLUS 415 – Typical Price – £600-£800

    Heat Only Boilers Prices and Sizes:

    The cost of your Heat only boiler would depend on the size of your house and the fuel type required etc. Heat-only boilers are ideal for larger homes as they have a high flow rate, are able to meet high hot water demands, and multiple taps or showers can be used at any one time. They will however require more space than other boilers such as the combi, and the use of hot water is limited by the size of your cylinder so once it’s gone, you must wait for it to reheat.

    Heat only boiler brands and prices for different sized properties:

    Heat only boilers for smaller properties:

    If you live in a small property and space is of primary concern, there are more compact, wall mounted options for heat only boilers.


    • Output – 12;15;18;24;32KW
    • Price: £500-£600

    Brand: BAXI SOLO 12 HE

    • Output – 12;15;18;24;30;35KW
    • Price: £600-£700

    Heat only boilers for medium to large Properties:

    Medium and large sized properties need a heat only boiler, with a high output; ensuring that you are able to heat your entire home.


    • Output – 38KW
    • Price: £1,200-£1400


    • Output – 30;42KW
    • Price: £1,500-£1700

    What is the Best combi boilers & boiler brands including Combi Boiler pricing?

    UK Combi boiler brands and reviews:

    According to uk consumer brand Which, “if you want to buy the best combi boiler, you will  need to make sure it’s the correct size for your home and from a reliable brand.”

    The Which article then went on to rate the Most common brands of Combi boiler under categories like:

    • Brand Overall score,
    • Reliability score,
    • Customer score,
    • Brand engineer overall score,
    • Typical price for a 30kW Combi boiler.

    What is the Typical prices for the UK combi boiler brands were listed in this article?

    • Baxi £880 – £1,000
    • Glow Worm £700 – £990
    • Ideal £590 – £1,270
    • Potterton £650 – £1,350
    • Vaillant £1,160 – £1,410
    • Viessmann £780 – £1,280
    • Worcester Bosch £800 – £2,460

    The Which? article says that the Reliability and brand customer score was based on responses from 8,001 members of the public who’ve bought a combi boiler in the last six years, that took place in May-June 2021.

    What is the Brand Engineer Score?

    The Brand engineer score was based on responses from 153 Which, Trusted Trader heating engineers in June 2021. The typical price range for the which assessment was based on the low and high price ranges for a standard 30kW combi boiler, across the combi boiler brand’s full range. A 30kW boiler is suitable for most medium-sized homes. The combi boiler prices do not include the boiler installation costs.

    Read more about the combi boiler assessment by consumer magazine which at: – Which?

    What makes a good combi boiler?

    So now you can see the combi boiler scores via the article direct and the various prices, it good to also consider what makes a good combi boiler? According to the article, a good combi boiler will deliver plenty of hot water for your showers, baths and sinks, and will keep your radiators piping hot throughout the coldest of winters. The article also covers the brands that make the most reliable combi boilers, according to the Trusted Trader Heating Engineers that were questioned, Everything you need to know about Boilers.

    What are the main UK brands that make combi boilers?

    As per the same Which? article which sites a 2021 boiler survey of 8,001 members of the public. There are 17 gas and oil boiler brands that are all producing combi boilers.  Please find some details and pricing for the top 7 combi boiler brands:

    Brand: Baxi boilers:

    Baxi is one of the biggest combi boiler manufacturers in the UK. Details: Its range of Assure, Duo-tec, Megaflow and Platinum combi boilers come in various sizes to suit almost any size and type of home. Price – They typically cost between £880 – £1,000 for a 30kW medium-sized combi boiler, although it has models starting from around £550.

    Brand: Glow-worm:

    Details: Glow-Worm has several ranges of combi boilers including Energy, Essential, Betacom, Easicom and Ultimate. Price: Prices starting from around £560, with a medium-sized combi boiler usually being between £700 – £990.

    Brand: Ideal boilers:

    Details: Originally called the National Radiator Company, Hull-based Ideal has been around for 100 years. It has several ranges of combi boilers including Exclusive, Instinct, Esprit Eco and Logic+ ranges. Prices You can get a 30kW medium-sized Combi boiler from around £590, going up to £1,270. 

    Brand: Potterton boilers:

    Details: Potterton is part of Baxi, which is in turn part of the BDR Therma Group. As such, several of Potteron’s ranges – such as its Assure range – have been absorbed under the Baxi name. It still owns the Titanium Combi boiler brand. Prices for the Titanium start at £800 for the 28kW size.

    Brand: Vaillant boilers:

    Details: German manufacturer Vaillant is a large combi boiler manufacturer which has the ecoFIT and ecoTEC range of combi boilers.

    Price: These Combi boilers typically start between £1,160 – £1,410 for a medium-sized boiler of 30kW.

    Brand: Viessmann boilers:

    Details: Viessmann is a German boiler brand making waves in the UK boiler scene. Its Vitodens combi boiler lines have been updated in 2021. The Viessmann Boilers cost between £780 –  £1,280 for a mid-sized 30kW boiler, and come in a large range of sizes for the requirements of any home.

    Brand: Worcester Bosch boilers:

    Details: German manufacturer Worcester Bosch is one of the biggest combi boiler manufacturers in the UK. The Greenstar combi boiler range starts at around £800 and goes up to around £2,500, depending on the size and the hot water flow that you need for your home.

    What the Other things to consider are situations like?

    • Combi boilers are less suitable for homes with multiple bathrooms.
    • A faulty combi boiler will fail early and is likely to result in regular costly repairs.
    • On average, it costs almost £200 for a boiler repair so this can soon add up, making any cheaper boiler purchase more expensive than a more expensive but more reliable boiler, in the long run.(Which? survey, 2021).
    • It pays to invest in a boiler that will last. 
    • Size matters.  An oversized combi boiler will lead to you spending more on your heating and hot water than you need to, and an undersized one will deliver a disappointing flow of hot water to your taps and radiators.

    Please read our guide on the different types of boiler to see which type will best suit your property and your requirements.

    What makes a good combi boiler?

    1. In order to get the best combi boiler, it is crucial to choose a reliable brand that won’t break down.
    2. It’s also important to pick a combi boiler that’s the right size and fit for your home. 
    3. And you need to select the right boiler for your budget*

    *we can assist you with finance should this be required fir your new boiler purchase and installation.

    How to pick the right size combi boiler for you property?

    • The simplest way to estimate the size of boiler you might need is to count the number of radiators you have.
    • If you have Fewer than 10 radiators you require a boiler under 27kW
    • Where you have 10-15 radiators you need a boiler between 28kW and 34kW
    • For properties with more than 15 radiators you need a boiler with over 34kW

    What the is Best System Boilers, Boiler Brands & System Boiler Pricing?

    System boilers are common in the UK:

    The system boiler is especially popular for households with more than four people or properties with more than one bathroom. Please find some information, advice and pricing on the best system boilers for you to choose from. If you are unsure whether you need a system boiler, a combi boiler, or a heat only boiler, please take a look at our quick online guide.

    What is the Best System Boilers for this year, 2022 and beyond?

    Please also take a look at our best combi boilers and best heat only boiler pages!

    According to a recent Which? Article, the best 3 UK system boilers for 2021 and beyond are:

    • Viessmann Vitodens 100-W System
    • Worcester Bosch Greenstar i System
    • Vaillant ecoTEC Plus System

    Brand: Viessmann:

    Model: Viessmann Vitodens 100-W Gas System Boiler

    Details: The Viessmann Vitodens 100-W System boiler is a reliable and fantastic wall mounted gas condensing boiler.  These gas system boilers are available for prices around £1000, making it a great choice for any home who wants a top-quality but affordable system boiler. The Viessman Vitodens 100-W comes in 26kW, 30kW, and 35kW system boiler sizes.

    This system boiler is perfect for larger homes with more than four people, or more than one bathroom, where the demand for hot water is high and to multiple taps at once. This system boiler rates ‘A’ Class in the SEDBUK energy efficiency ratings.

    Main Features:

    • High modulation ratio of 1:6
    • SEDBUK A Rating
    • MatriX pre-mix cylinder burner and an integral AquaBloc hydraulic unit
    • Various Kw Heating Output -26kW, 30kW, and 35kW
    • Very Quiet Boiler
    • Optional external weather detector
    • Advanced technology
    • Which Rating 76%
    • LCD touchscreen
    • Compact size
    • Lightweight
    • 5- year parts and labour warranty as standard (Up to 10 years with Viessmann Installer)

    1st place due to quality, performance, lengthy warranty and value for money. 

    This boiler is usually priced around £1,000 and with installation, you can expect a cost between £1800-£2200 depending on the installation cost of the company who’s installing it. 

    Brand: Worcester-Bosch:

    Model: Worcester-Bosch Greenstar 24i System Boiler Reviews

    Details: The Worcester-Bosch Greenstar 24i System Boiler is one of a range of highly energy-efficient A-rated gas boilers from Worcester-Bosch.

    Are These Boilers are highly rated by SEDBUK 2009?

    The Worcester-Bosch Greenstar 24i System requires a hot water storage cylinder; however, it doesn’t require a feed and expansion cistern. This makes the Greenstar 24i a quick and easy Boiler to install which can being down the installation cost, and this also makes it efficient and economical to run.

    Main Features:

    • ERP rating: A HEAT
    • Efficiency Rating: 94%
    • Band Rating: A Rated
    • LPG Compatible: Yes
    • Standard Warranty: 5 Years
    • kW Options: 24.6 kW
    • Mounting: Wall-mounted

    2nd place due to value for money and efficiency. The price comes in around £1,000 on average for these Boilers, with an installation price, being around £1,800 to £2,200. 

    Brand: Vaillant:

    Model: Vaillant ecoTEC Plus System Boiler

    Details: The Vaillant ecoTec boiler range is a fantastic and low energy consumption system boiler.

    A Vaillant ecoTEC boiler has excellent performance for hot water and central heating which results in lower energy costs for you.  The ecoTec 30kW is the most popular size boiler in this range, but it is also has; 12kW, 15kW, 18kW, 24kW, 30kW and 37kW models available.

    Smart Tech:

    An ecoTEC plus is smart: when it knows you don’t need as much heating power, it can drop to using 16% of its maximum power saving on fuel and money and is known to be efficient, easy to use, reliable and quiet.

    With its straightforward backlit display and like the Viessmann, its stainless-steel heat exchanger and it’s premium components, it’s really one of the top system boilers available on the market today.

    Vaillant System Boilers Features:

    • For use with Unvented Systems.
    • Stainless steel heat exchanger
    • Advanced modulation during low usage to ensure maximum efficiency
    • New high-efficiency pump to reduce energy consumption
    • Stylish contemporary case design to ensure a seamless fit with home decor
    • ErP Compliant
    • Lightweight and compact
    • Natural Gas fueled
    • Includes 2 stage frost thermostat
    • Built-in pump and expansion vessel
    • Compatible with Unvented systems

    3rd place due to being an excellent boiler with reliable internal components meaning that you can’t go far wrong with the Vaillant EcoTec series system boilers.

    This boiler usually costs around £1500 with an installed price of £2000+

    What’s the average cost of a system boiler in 2021?

    The average system Boiler costs for 2021 is £1,750. The low end of the range is around £1000, whilst the top end of the range are around £3000.

    Remember that boilers are one of the most important features of your home in terms of use and cost, so picking the right one is important. 

    If you need help making your decision feel free to contact us.

    What is the Best Heat Pumps, Brands & Pricing?

    There are two different types of heat pumps:

    • Ground Source Heat Pumps
    • Air Source Heat Pumps

    What’s the difference?

    Air Source Heat Pumps:

    The most common type of heat pump is the air source heat pump, which transfers heat between your house and the outside air. An air source heat pump will extract heat from air outside your property in the same way a fridge extracts heat from its inside.

    Still Operates in the cold:

    The Air heat pumps become less efficient the cooler it is outside, but they can be capable of operating sufficiently in temperatures of -15 C, which is 99.99% of the year in the UK.

    They have fantastic energy efficiency ratings and although they do have some impact on the environment (as they require electricity to run), they do not combust fuels directly, so in most cases they provide a fantastic way of lowering your carbon footprint.

    Ground Source Heat Pumps:

    A ground source heat pump functions similarly, but it functions by taking the residual warmth from the soil or a water body outside your property and moves it to the inside of the property.

    Ground source, water source or geothermal heat pumps achieve higher efficiencies by transferring heat between your house and the ground or nearby water source.

    Low operating costs:

    Although they are more expensive to install they generally have lower operating costs because they can rely on more constant source temperatures. The ground heat pumps also have fantastic energy efficiency ratings and although they do have some impact on the environment (as they require electricity to run), they do not combust fuels directly, so in most cases they too, provide a fantastic way of lowering your carbon footprint.

    As per some recent Boiler Guide Articles please find the best heat pumps from each type:

    What is the Best air source heat pumps and prices?

    Typically the air source heat pumps or an average property would usually costs between £4,000 – £11,000*. Please find details of best air source heat pumps as well as an estimate of the costs.

    *Although in the UK you can currently get £5,000 contributed towards the cost.


    This may sound like a big price tag but when you consider that it could be efficiently heating your home for around 20 years with reduced heating bills, it easy to see how it will soon be paying for itself.

    Using the table below you can get a quick understanding of what each of the models has to offer before we go into more detail about each one individually.


    ManufacturerModelAvailable Outputs (kW)ErP Energy Efficiency RatingPotential Price
    DaikinAltherma 34, 6, 8A++£6,000 – £8,000
    NibeF20408, 12, 16A+++£6,000 – £8,500
    SamsungEHS Mono16A+++£1,750 – £4,000
    VaillantaroTHERM5, 8, 11, 15A++£3,000 – £7,000
    ViessmannVitocal 200-A2.6 – 11A+++£5,500 – £9,000
    GrantAerona³6 – 16A++£4,000 – £7,000
    MitsubishiEcodan QUHZ4.5A++£4,000 – £6,000
    LGTHERMA V R325-16A++£4,000 – £6,000
    HitachiYutaki S80211,14, 16A+++£4,000 – £6,000

    The prices in the table above are estimates and do not include the cost of installation, which will vary depending on who carries out the work.


    We highly recommend getting quotes from at least 3 different installers to give you the greatest chance of finding the best deal for your home. We here at Let’s Heat can provide you with one of those quotes online now! Get a quote.

    While it might feel that the costs are already beginning to add up, you can begin to make these initial costs back via reduced energy bills and Renewable Heat Incentive payments during the lengthy lifetime of an air source heat pump.

    Brand: Daikin Altherma:

    Over the past 90 years, Daikin have built up a worldwide reputation for the quality of their forward thinking air conditioning and climate control technology.

    The Daikin Altherma with Bluevolution Technology 3 is an air-to-water system that can operate in temperatures as low as -25°C which means your home will get heating from the air even in the depths of winter. It is the first air-water heat pump in the UK using R32 as a refrigerant and achieves an overall seasonal efficiency of A++. You also have the option of controlling your heating via an app on your smart device.

    Indoor & Outdoor Units:

    The indoor unit is designed for easy installation and maintenance as all the hydraulic components are accessible from the front. It needs to be combined with a separate domestic hot water tank with a capacity of up to 500 litres with or without solar support. The outdoor unity has handles for easy installation as well as an out-blow grill and factory mounted suction grill as extra safety features.

    Brand: Nibe F2040:

    Details: Nibe are a Swedish company that’s grown to become a leading manufacturer of domestic heating products in many countries across Europe. The Nibe F2040 is a highly efficient air source heat pump shown through its ErP rating of A+++.

    You won’t have to worry about the installation of this appliance as that’s been designed to be as smooth as possible, thanks to it being fitted with an anti-vibration water connection.

    Smart Device:

    By downloading the Nibe Uplink app to your smart device, you can get quick overviews and status updates of the appliance and the heat it’s generating. Should there be an issue with your air source heat pump, which is very rare, then an alert will be sent to your device immediately.

    Brand: Samsung EHS Mono:

    You’re probably more familiar with Samsung’s phones than their air source heat pumps but after years of research, they’ve released the EHS Mono range.

    The unit is compact and lightweight which makes them simple to install and you have the option of it being wall mounted or floor standing. The EHS Mono is capable of achieving high water temperatures of 55°C and can still extract heat from the air in temperatures of -25°C. It even operates quietly.

    Brand: Vaillant AROTHERM:

    Vaillant are a trusted manufacturer of gas boilers and also have a range of renewable products available from ground source heat pumps to solar thermal. The aroTHERM air source heat pump is a compact unit that makes installation easy. The appliance comes MCS accredited and Quiet Mark approved as it ultra-quiet operation. It can be easily integrated into domestic heating systems which means that the installation will cause very little disruption.

    To further improve performance and give extra protection from corrosion the unit has a blue fin coated evaporator with anti-hydro coating.

    Brand: Viessmann Vitocal 200-A:

    The Viessmann Vitocal 200-A is not only an air source heat pump but also said to be an ‘ornament for your garden’ thanks to its extremely modern design. The unit and can integrate with both new and existing heating systems. It can achieve a maximum flow temperature of 65°C for heating as well as convenient domestic hot water heating. It does all of this while operating extremely efficiently and quietly while only incurring minimal electricity costs.

    Cooling too!

    Not only can you rely on the Vitocal 200-A to heat your home, it’s also capable of reversed operation in the summer, meaning that it can cool your home during the warmer months and is compatible with energy from solar panels.

    The Vitocal 200-A is user friendly thanks to the Vitotronic control unit, featuring a plain text and graphic display plus the option of remote control with the ViCare app and Vitoconnect.

    Brand: Grant Aerona³:

    Details: Grant’s range of MCS approved air source heat pumps is the Aerona³ and is the third generation of ASHPs by Grant. These pumps are single phase, DC inverter driven and have an ErP energy rating of A++.


    They incorporate in-built weather compensation and a base tray heating element to prevent ice formation and can extract heat in temperatures as low as -20°C. Available outputs include a a 6, 10 or 16kW model as well as the new 12kW R32.

    The Aerona³ 12kW R32 inverter driven air source heat pump is the latest addition to the range. It uses a more ‘environmentally friendly’ refrigerant (R32) which has a lower Global Warming Potential (GWP) rating than other typical heat pump refrigerants.

    It is the first monobloc R32 air source heat pump to be launched in the UK and is suitable for S-Plan heating control systems.

    Brand: Mitsubishi Ecodan QUHZ:

    Details: The Ecodan QUHZ from Mitsubishi is a monobloc air to water heat pump system with a thermal store. It features low noise output and has a built in monitoring system to enable you to track and potentially reduce your energy use.

    The Ecodan system includes an outdoor unit which only requires a supply of electricity and water and an indoor hot water cylinder (thermal store) which acts just like a standard hot water cylinder works alongside a boiler providing your heating and taps with hot water.

    New Builds & Hybrid System:

    This pump can be installed in new builds or alongside existing heating or in a hybrid system if you are keeping your gas boiler as a back up. The Ecodan can be controlled using a wireless controller or via an app on a smart device.

    Brand: LG THERMA V R32:

    Details: The THERMA V R32 air to water heat pump uses with R32 refrigerant, an environmentally sustainable refrigerant which has a Global Warming Potential 70? lower than that of R410A. It is a highly efficient model with a A+++ rating thanks to the Revolutionary Scroll Compressor.

    The THERMA can operate in temperatures as low as -25°C and heats water to a maximum of 65°C. The user interface is intuitive enabling quick and easy use and lets you programme heating schedules based on your lifestyle.


    You can also monitor your energy consumption on a daily or monthly basis and control it remotely via the G SmartThinQ™ app on your smart device.

    This pump is an all-in-one heating solution with 3 main components built-in to allow easy installation without additional refrigerant piping work and easy access for servicing.

    Brand: Hitachi Yutaki S80:

    Details: Hitachi’s Yutaki-S80 high temperature heat pump produces hot water up to 80°C thanks to an energy-efficient, secondary Cascade R134a Heat Pump Circuit instead of an electrical element which gives a boost from 45°C to 80°C. It will operate all year-round even in temperatures as low as -20°C.

    The Yutaki S80 has an energy efficiency rating of A+++ so will keep energy usage to an absolute minimum. It will provide both heating and hot water with a hot water recovery time which is the same as a traditional boiler.

    The S80 is ideal for new builds and replacing boilers in existing homes and even older properties where higher water supply temperatures may be required to keep the house warm. It is not intended to work in a hybrid system alongside a back up boiler.

    Comparing air source heat pumps:

    When trying to choose the best air source heat pump for your home, there are several key features to consider apart from the price.

    What Types of air source heat pumps?

    There are two types of air source heat pumps to choose from air to water or air to air.

    • Air to water heat pumps are the most popular as they pride heating and hot water.
    • Air to air heat pumps are less popular, as they only provide space heating and not hot water production.

    What is the difference between monobloc or split heat pumps which refers to how the system is set up in your home?

    • A monobloc has all of its components (apart from the hot water cylinder in your home) in one compact unit outside the home.
    • A split heat pump includes an outdoor with the heat exchanger and refrigerant as well an internal unit inside.

    Most homes in the UK are ideal for a monobloc air to water heat pump, but a split system may be suitable for more complicated installations as it can be installed up to 30m away from the home offering a more flexible installation.

    Energy Efficiency:

    Air source heat pumps are exceptionally efficient, as for every kW of energy they use, they generate three times as much usable heat.

    While some heat pumps may be labelled with better efficiency ratings than others, it is important to remember that the actual efficiency you achieve will be greatly influenced by other factors like the level of insulation, the outside temperature, and your demand for hot water.


    Air source heat pumps are available in a range of different outputs to suit different sizes of homes.

    It is important to install the right output, but a professional heat pump installer will be able to advise you on this topic.

    Is an air source heat pump right for your home?

    There are many pros and cons of installing an air source heat pump but if you like the sound of enjoying the ways an air source heat pump could be benefiting your home, such as:

    Reduced energy bills:

    Air source heat pumps are highly efficient heating systems that have the potential to lower your energy bills.

    RHI payments:

    Air to water heat pumps are eligible for quarterly payments over 7 years through the Renewable Heat Incentive scheme.

    Better for the environment:

    Heat pumps use only a small amount of electricity to run and are capable of generating significantly less carbon than fossil fuel heating systems.

    Heat your home all year round:

    Make use of your air source heat pump all year round even in the coldest UK winters.

    Easy to maintain:

    Aside from annual servicing heat pumps a they require very little maintenance and can be left alone to heat your home.

    Long lifetime:

    Many can last for up to 20-25 years. That’s around twice as long as a modern boiler.

    However, it is important to note that air source heat pumps are not suitable for every type of home.

    For an air source heat pump to be effective your home needs to have features like:

    • A high level of insulation
    • Outside space for the fan unit
    • Large radiators or underfloor heating for maximum heat delivery as heat pumps deliver heat at a lower temperature than boilers
    • Small amount of electricity to operate
    • A hot water cylinder

    To get the best price on an air source heat pump for your home, it is important to compare multiple quotes from different companies. This can take time but we can help make your research a lot easier.

    Which is the best ground source heat pump?

    According to another boiler guide article, one of the best ground source heat pumps is the Viessmann Vitocal 222-G.

    Heating & Hot Water:

    Not only will the Vitocal 222-G heat your property in a highly efficient manner, it will also provide domestic hot water too. This is thanks to being fitted with an integral hot water cylinder with a capacity of up to 220 litres.

    Ground Source Heat Pump with Cooling:

    Unlike other renewable heating systems, the Vitocal 222-G can provide cooling during the summer months by harnessing the cooler underground temperatures too.

    Best Ground Source Heat Pump by Warranty:

    The only downside to the Vitocal 222-G is that it’s warranty period of 2-5 years is beaten by other models. If warranty is important to you then look no further than the Vaillant geoTHERM which comes with a parts and labour warranty of up to 7 years.

    Comparing ground source heat pumps:

    To find the best ground source heat pump for your property, it’s important to consider the following:

    • Output rating
    • Unit Dimensions
    • Length of the warranty period
    • Efficiency rating
    • Potential cost
    • If it’s Microgeneration Certification Scheme (MCS) certified – required for Renewable Heat Incentive eligibility

    What is Best ground source heat pumps and prices?

    In the table below, we’ve compared key information about the best ground source heat pump models side-by-side.

    ManufacturerModelAvailable Outputs (kW)ErP Energy Efficiency RatingPotential Price
    VaillantgeoTHERM22, 30, 38, 46A++£8,000 – £12,000
    ViessmanVitocal 222-G6.1 – 10.0A++£6,000 – £7,500
    NibeNibe F11455 – 17A+++(17kW – A++)£9,000 – £10,000
    KensaEvo7, 9, 13, 17A++£8,000 – £12,000
    Worcester-BoschGreenstore 6 System6, 7, 9, 11A+£4,500 – £8,000

    The above ground source heat pump prices are estimates but many ground source heat pumps tend to cost £8,000 to £12,000 to buy and install.

    What are Nibe ground source heat pumps?

    A Nibe heat pump could potentially lower your energy bills by as much as 75%. This is thanks to the minimal amount of electricity that is required to power the heat pump during operation.

    Nibe ground source heat pumps are split into 2 ranges:

    • The F Series
    • The more recent S Series.

    Nibe S Series:

    • Output ratings from 6 kW up to 25 kW
    • Integrated wireless connectivity
    • User-friendly touchscreen display
    • Use the uplink app to control the heat pump from your smartphone
    • Automatically adjust the heating based on the weather conditions
    • Integrated hot water heater (180 litres)
    • Also boasts cooling technology
    • Can be used with voice assistant
    Nibe S Series Heat PumpsOutput Ratings (kW)EfficiencyWarranty
    S12556, 12, 16A+++2 -7 years
    S11556, 12, 16, 25A+++2-7 years

    2. The more recent S Series:

    • Operational costs are kept to a minimum
    • Smart energy-saving technology
    • Outputs ranging from 5 kW up to 60 kW
    Nibe F Series Heat PumpsOutput Ratings (kW)EfficiencyWarranty
    F12556, 12, 16A+++2-7 years
    F11556, 12, 15A+++2-7 years
    F11456, 8, 10, 12, 15, 17A+++2-7 years
    F135528, 43A+++2-7 years
    F134524, 30, 40, 60A+++2-7 years

    Learn more about Vaillant ground source heat pumps:

    The most popular Vaillant ground source heat pumps are in the geoTHERM range. However, they also manufacture a diverse range of flexoTHERM multi source heat pumps which can be adapted to take heat from the air or water as well as the ground.

    These heat pumps are amongst the most quiet during operation and have been awarded Quiet Mark accreditation as a result.

    Vaillant Ground Source Heat PumpsOutput Ratings (kW)Efficiency RatingWarranty
    geoTHERM22, 30, 38, 46A++Up to 7 years
    flexoTHERM multi source5, 8, 11, 15, 19A+++5-7 years

    Learm more about Viessmann ground source heat pumps:

    Viessmann have an extensive range of ground source heat pumps to choose from with outputs from 5.6 kW all the way up to 96.1 kW. Their Vitocal range of heat pumps offer a number of benefits for new builds, semi-detached, detached homes and larger residential properties.

    If you’re looking for a heat pump that can meet your domestic hot water demands then the Vitocal 222-G has an integral hot water cylinder.

    Viessmann Ground Source Heat PumpsOutput Rating (kW)Efficiency RatingWarranty
    Vitocal 200-G5.6, 7.5, 9.7A++5-7 years
    Vitocal 222-G5.8, 7.5, 10.4A++5-7 years
    Vitocal 300-G5.7, 7.6, 10.4, 13, 17.2A++5-7 years
    Vitocal 350-G25.4, 34.7, 42.2, 52.3A++5-7 years
    Vitocal 350-G Pro27.2, 34.3, 56.1, 76, 96.1A++5-7 years

    Learn more about Mitsubishi ground source heat pumps:

    Mitsubishi Ecodan Monobloc heat pumps can take heat from the ground or a water supply, such as a lake. These are powerful models with outputs of 45 kW and 60 kW that can be installed as single modules or stacked together to increase the power output (up to 960 kW).

    The system delivers water flow temperatures of up to 65°C and is MCS certified which means that it’s eligible for the Renewable Heat Incentive.

    Mitsubishi Ground Source Heat PumpsOutput Rating (kW)Efficiency RatingWarranty
    Ecodan Monobloc45, 60A++3-7 years

    Learn more about Worcester Bosch ground source heat pumps:

    Worcester Bosch ground source heat pumps are available as either combination (combi) or system models. All models in the combi range have an integrated hot water cylinder (185 litres) for domestic hot water storage.

    Meanwhile, the system range of heat pumps require you to have a separate hot water cylinder* installed.

    *It is important to note that this hot water cylinder must be heat pump compatible.

    Worcester Bosch Ground Source Heat PumpsOutput Ratings (kW)Efficiency RatingWarranty
    Greenstore LECP Combi5.4, 6.6, 8.7, 10.2A+ 
    (Greenstore 11 – A++)2 years  
    Greenstore LECP System5.4, 6.6, 8.7, 10.2A+ 
    (Greenstore 11 – A++)2 years  

    Learn more about Kensa ground source heat pumps:

    Kensa offers a fairly extensive range of ground source heat pumps. Output ratings ranging from 3 kW up to 30 kW are available across 3 ranges: Evo, Shoebox and Twin Compact.

    All of Kensa heat pump ranges are highly efficient, come with a warranty of 5 years and are eligible for RHI payments.

    The main difference is price. Shoebox heat pumps are the most affordable (from £3,510) while the Twin Compact range has the highest price tag (from £9,230).

    Evo heat pumps sit in between with prices of the models in this range starting at £5,862.

    A key benefit of all single-phase Kensa heat pumps are the electrical ‘soft starts’ which ensures that energy consumption is kept to a minimum during start-up.

    Kensa Ground Source Heat PumpsOutput Ratings (kW)Efficiency RatingWarranty
    Evo7, 9, 13, 15, 17A++5 years
    Shoebox3, 6A+5 years
    Twin Compact12, 15, 16, 17, 20, 24, 30A++5 years

    How much does Ground source heat pump installation costs?

    The total cost of installing a ground source heat pump can come to between £10,000 and £18,000. In some cases, these costs can stretch to over £30,000. Ground source heat pumps aren’t the most affordable heating systems. And installation is fairly complex which means that the installation costs can be fairly high too.

    However, while high, these prices don’t tell the whole story. This is because you will likely be making significant energy bill savings and could also be receiving RHI payments.

    Existing SystemEnergy Bill Saving per yearRHI Payment (1 January – 31 March 2018)
    Gas Boiler (G-rated)£505 – £580£2,335 to £2,750
    Gas boiler (A-rated)£65£2,335 to £2,750
    Oil boiler (G-Rated)£900 to £1,110£2,335 to £2,750
    Oil boiler (A-rated)£570 to £665£2,335 to £2,750
    LPG boiler (G-rated)£560 to £665£2,335 to £2,750
    LPG boiler (A-rated)Increase of £55 to £65£2,335 to £2,750
    Coal£525 to £645£2,335 to £2,750


    Here are the Boiler Types:

    Confirmation of the four main types of boilers and heating systems:

    1. The Common, Heat Only Boiler
    2. A System Boiler
    3. Combi Boiler, Condensing Boiler
    4. The new Heat Pumps!

    The boiler installation & repair team here at Let’s Heat, are all fully qualified to the highest standards and take pride in producing exemplary work standards which include completing all boiler installation requirement no matter what time or day this is required!

    Different Types of Boiler Installations explained:

    There are three main types of boiler installation and each has a different level of complexity which can impact the boiler installation times:

    1. Straight Swap
    2. Boiler Relocation
    3. System Upgrade

    Please find more details about each type of installation as well as an estimate of the time each type of installation will take:

    Type of installation: Straight swap (same location):

    Details: A straight swap installation, also known as a like-for-like swap, is a type of boiler installation that involves replacing your current system with a boiler of the same type, in the same place.

    Time: This is generally the quickest type of boiler installation as it requires very little change and can often be completed in just one day.

    See boiler prices for the costs of your new boiler and boiler installation.

    Type of installation: Boiler relocation

    Details: A boiler relocation installation requires moving your new boiler to a different location within your property and this could slightly prolong the installation process. Your boiler engineer may have to make changes to the existing pipework or they may have to cap the current pipework and install new elements to the new location. Time: This adjustment could add another day on to the standard one day installation making it up to 2 days of installation*.

    *It’s worth noting that the further away you choose to install your new boiler, the longer the installation is likely to take which will also have an impact on your price.

    See boiler prices for the costs of your new boiler and boiler installation.

    Type of installation- System upgrade:

    System upgrade installations are where homeowners choose to change the type of boiler they have installed in the property. For example, switching from a heat only boiler to a combi boiler would be considered a system upgrade. Combi boilers have become the most popular boiler type in the UK, so many people choose to upgrade to this type of system from the older heat only boiler variety.

    Time: A system upgrade could make your installation take up to 3 days* or more depending on the complexity of the job.

    This may seem like a long process, but the benefits of upgrading to a more efficient system can often make it worthwhile.

    See boiler prices for the costs of your new boiler and boiler replacement

    Why choosing the right boiler is important?

    Choosing a suitable boiler for your home can provide you with all the heating and hot water that your family or property require. You could also save money on your annual energy bills and reduce your carbon footprint by using a more efficient system for your requirements.

    MagnaCleanse Vs Power Flush Vs Chemical Flush: Which Is Best and Why?

    Welcome to the “MagnaCleanse Vs Power Flush Vs Chemical Flush” section.

    Keeping your boiler healthy is important for the continued energy efficiency of your system. Having a regular boiler maintenance service is crucial to a smooth and efficient running of your heating system.

    Just like an engine, your boiler and heating system is something that needs to be looked after and regularly maintained in order to keep it running to its peak operating performance.

    The best way to do this is by using a full flush process for your central heating system:

    System Flushes / Full Flushes:

    There are three different types of full heating system flushes:

    • PowerFlush
    • Chemical Flush
    • And the New MagnaCleanse Flush

    So the big question is, which type of system flush should you use and why?

    Until recently when the newer MagnaCleanse flush arrived, it was very much a powerflush vs chemical flush debate and deciding which was less harmful to your system was one of the main decisions. 

    More to think about now!

    However now that there is a third option the choice is even more difficult to make.

    In this quick inline system flush guide, we will help you to identify the different types of system flush processes available to you.  

    We’ll also help you to decide which one is best for you and why!

    Why do you need a system flush?

    If a system flush isn’t carried out as and when it needs to be, the water in your boiler will eventually be contaminated with rust and other unwanted elements.

    Prevents inefficiency over time:

    Over time, the rust, debris, and dirt turns into a ‘sludge’ like substance which will prevent your system from functioning as efficiently as it should. Without the right type of flush, your system could become inefficient or even not working.

    This would result in the need for a new boiler installation or a boiler repair service to your property to fix the issue.

    How regular is a system flush required?

    Depending on your current boiler type and brand, you may only need a flush once every 5 years or so. A copper heat exchanger will be much more durable and resistant, as opposed to stainless steel one.

    Depending on the boiler type, a flush may be necessary more often again…

    If you’re unsure or would like some further advice on when your boiler’s next flush is due, or which flush is best*, please chat with one of our expert engineers by contacting us via the contact details!

    *However we will always recommend a MagnaCleanse over any other type of flush.

    MagnaCleanse Flush

    Approved by our manufacturer partners, a MagnaCleanse is a highly effective way of keeping your system protected. So if the experts say to use it, it’s probably best to use it. 

    So, What is a MagnaCleanse Flush?

    The MagnaCleanse system flush is the process of clearing your system of those harsh, unwanted materials it has contained within it. It thoroughly cleans your entire heating system.  This provides consistent protection to your pipes and boiler.

    Easy Disposal:

    The added benefit of a MagnaCleanse filter helps to collect sludgy residue away from your system for easy disposal.

    Do i get Free MagnaCleanse Flush with a new boiler install?

    We carry out a MagnaCleanse system flush free with every boiler installation or replacement. This will ensure your heating system will stay as new as possible for as long a time period as possible.

    What is a power flush?

    A central heating power flush is one of the older cleaning processes for a central heating system. As it sounds, this process uses a solution of chemical that travel through your system and pipes. This chemical solution removes debris, dirt, and rust as well as any other unwanted waste material.

    What is a chemical flush?

    A chemical flush is similar to a power flush but does differs from a power flush.

    Why is the chemical flush different?

    The chemical flush is different because it uses gravity to empty the system and refill it. During this process, the cleaning chemicals are dispersed around the system to remove unwanted materials and residue. The system is then flushed with clean water and boiler inhibitor to ensure that the system is left fully protected.

    How to flush a central heating system:

    There are three main ways to flush a central heating system:

    1. MagnaCleanse
    2. PowerFlush
    3. Chemical Flush

    How to MagnaCleanse a central heating system?

    Firstly, before you MagnaCleanse a system, it’s important to drain it completely. Then, connect the MagnaClease RapidFlush filter to your system valves using the provided hoses.

    Quality Cleaning Solution:

    The MagnaCleanse cleaning solution can then be added to the system. By combining the flush components with quality cleaning chemicals you’ll have a special formula ready to intensely clean your system at a high strength.

    The sludge will be collected in the filter which can be easily disposed of.  

    How to power flush a central heating system:

    To carry out a power flush, it should always be an engineer’s job. They will connect a pump to your central heating system from either the pump head or the circulation pump (depending on boiler type).  Your engineer will then pump a chemical solution through the system removing any debris and rust, helping to replenishing your boiler. The solution will include a descaling agent as well as other chemicals that will prevent rust from forming.

    The waste materials will then be collected and disposed of safely by an engineer.

    How long does a power flush take?

    A power flush cleaning process can be a lengthy process, but the results will be more than worth the wait.

    The power flush process could take from 5 hours to 10 hours, depending on a number of factors like:

    •        Number of radiators that you have.
    •        How old your current boiler system is.
    •        Amount of ‘sludge’ in your pipes/system.

    Throughout the process, an engineer will look for other problems.

    These include any current or potential new blockages that could occur in the future.

    Some boiler components may need replacing or cleaning to ensure it doesn’t run into any further issues so that you don’t need a future boiler repair.

    Haven’t had your boiler flushed for some time?

    Your boiler isn’t in the best condition?

    Then this procedure will require more time in order to complete the process.

    How to chemical flush a central heating system?

    A chemical flush is a more basic version of the powerflush but can be just as effective. With this process chemicals are flushed through the system using gravity instead of a pump. As the cleaner is flushed around the system from the boiler, any debris will be caught by a magnetic filter.

    Proof of improvement:

    When the work is complete, an engineer will be able to show how much your system has improved after the flush. This is done by measuring radiator temperature and comparing it to what it was previously.

    The engineer will test your boiler and heating system to ensure that everything is working o optimal performance. By doing this they’ll be able to identify the areas in which there is a build-up of ‘sludge’ and if there are any leak risks. They’ll also be able to give you aftercare advice and ways you can get the most out of your heating system.

    How to spot the signs that you need a boiler or heating system flush?

    Please find the top 10 reasons why your heating system needs a flush!

    • Is your boiler breaking down?
    • Does your boiler need to be restarted regularly?
    • Do your radiators have cold patches while turned on, especially at the bottom?
    • Is your tap water discoloured or cloudy?
    • Do your radiators take a long while to heat up
    • Do your radiators not get warm at all?
    • Are your radiators quite noisy?
    • Is your boiler sounding quite noisy?
    • When bleeding radiators – is the water cloudy
    • Or is there is no water at all when you bleed the radiators.

    If you answered ‘yes’ to any of these questions, your system may need a flush.

    It’s also a good idea to schedule in a system flush if you have a new boiler installed to ensure it’s in top working condition.

    The advantages of a professional MagnaCleanse system flush?

    Looking after your central heating system is advantageous for so many reasons like:

    • From a deep clean of your system and pipes, you’ll ensure your boiler is more energy efficient and much more reliable than it would be without a flush.
    • Because the system will be clear of debris, it will run much smoother increasing the lifespan of your heating system.

    What the main benefits of a MagnaCleanse flush is the fact that it can be completed within as little as two hour?

    Looking after your central heating system is advantageous for so many reasons like:

    • A deep clean of your system and pipes means a more reliable and energy efficient boiler.  This will give you the extra confidence that you need.
    • With a fully cleaned system, the chance of a breakdown will be very slim.
    • Within two hours of application your boiler will be smoother, cleaner, and more reliable. Not to mention your boilers increased lifespan.
    • You will also have hotter radiators which heat up more quickly.
    • The cost of regularly replacing parts from a poor functioning boiler will be eliminated and you’ll have the peace of mind that you can trust your heating system to deliver to a high standard each day, as you’d expect it to.
    • With a fully cleaned system, the chance of a breakdown will be very slim.
    • You will have hotter radiators as they heat up quicker – great for those cold winter nights.
    • You will no longer have to worry about replacing parts as you’ll have a dependable heating system you can trust.

    MagnaCleanse Vs Power Flush Vs Chemical Flush – Cost Differences:

    The cost of a flush will entirely depend on a number of factors like:

    • The complexity of your system.
    • The size of the system.
    • Number of Boilers.
    • Number of Radiators.
    • Type of Flush.

    Engineers will also need to consider the possibility of running into a problem, which could hold the job up further. Total flush costs can vary between engineers – ranging from around the £300-£700 mark for any of the flush cleaning processes. There may also be additional costs dependent on additional work required or any part needing replacement for a fully efficient working system.

    You will be glad to know that the MagnaCleanse is free of charge if you purchase a boiler replacement service from us.

    The flush comes free as standard with all our boiler installations just to make your life easier.

    Choose a MagnaCleanse and extend the life of your central heating system:

    A central heating system is a crucial component in many households today. Keeping it in perfect working order is cost-effective and ensures that you can rely on it for years to come. To speak to one of our engineers, you can use our online quote feature to get an instant quote.

    So why use Let’s Heat?

    The Let’s Heat boiler installation & repair team are all fully qualified to the highest standards and take pride in producing exemplary work standards which include completing all boiler installation requirement no matter what time or day this is required!

    Our team of high quality professional engineers have an extremely high 4.9 out of 5, Trustpilot score given by our previous happy customers and we are fully accredited by Gas Safe and Corgi registered, as well as FCA approved for all of our financial transactions.

    Full range of heating & plumbing services provided by Let’s Heat:

    • Boiler Repairs & Installations
    • Boiler Supply & Fit
    • Financing Your Boiler
    • Emergency Boiler Repairs & Installations
    • Emergency Boiler Supply & Fit
    • Plumbing Repairs
    • Bathroom Plumbing
    • Kitchen Plumbing
    • Emergency Plumbing Repairs
    • Bathroom Plumbing in Emergencies
    • Emergency Kitchen Plumbing
    • General Plumbing Services
    • Emergency Plumbing Services
    • Emergency Gas & Heating Engineer

    Areas covered by our heating engineer services:

    The Let’s Heat engineers cover all of Wales & England


    Let’s Heat provide Heat Pump installations throughout Wales.

    This includes areas like; South East Wales, South Wales, South West Wales, Mid Wales, East Wales, West Wales, and North Wales.

    Welsh Cities:

    This includes all of the Welsh cities like; Cardiff, Newport, Swansea, and all other towns and cities in Wales.


    Let’s Heat provide Heat Pump installations  throughout England.

    This includes areas like; South West England, South East England, East Midlands, West Midlands, North West England, and North East England.

    Southern Cities:

    We provide our plumbing & heating services to cities all offer England like; London, Reading, Southampton, Portsmouth, Bristol, Exeter & Plymouth in the South.

    Midlands Cities:

    As well as cities like; Gloucester, Swindon, Oxford, Leicester, Nottingham, Derby, Birmingham, Worcester, Wolverhampton, Walsall in the Midlands.

    Northern Cities:

    And cities like; Liverpool, Manchester, Leeds, York, Sheffield, Newcastle, Sunderland and Middlesbrough in the North.


    What are the Different Types Of Boiler Systems in 2022?

    1-The Common, Heat Only Boiler
    2- System Boiler
    3- Combi Boiler, Condensing Boilers
    4- The new Heat Pumps

    How much does Heat Only Boiler cost?

    1- WORCESTER BOSCH GREENSTAR UTILITY 50 – 70 (OIL) – Typical Price – £1,700 – £1,900
    2- WB GREENSTAR FS 42CDI REGULAR – Typical Price – £1,500-£1700
    3- WORCESTER BOSCH GREENSTAR 30CDI REGULAR – Typical Price -£1,200-£1,300
    4- VAILLANT ECOTEC PLUS 428 – Typical Price – £800 – £900
    5- VAILLANT ECOTEC PLUS 415 – Typical Price – £600-£800

    What is the Best combi boilers and cost?

    1- Worcester Bosch £800 – £2,460
    2- Viessmann £780 – £1,280
    3- Vaillant £1,160 – £1,410
    4- Baxi £880 – £1,000
    5- Ideal £590 – £1,270
    6- Glow Worm £700 – £990
    7- Potterton £650 – £1,350

    What is the Best System Boilers in 2022?

    1- Viessmann Vitodens 100-W System
    2- Worcester Bosch Greenstar i System
    3- Baxi 800- 600
    4- Vaillant ecoTEC Plus System

    How to spot the signs that you need a boiler or heating system flush?

    Please find the top 10 reasons why your heating system needs a flush:

    1- Is your boiler breaking down?
    2- Does your boiler need to be restarted regularly?
    3- Do your radiators have cold patches while turned on, especially at the bottom?
    4- Is your tap water discoloured or cloudy?
    5- Do your radiators take a long while to heat up
    6- Do your radiators not get warm at all?
    7- Are your radiators quite noisy?
    8- Is your boiler sounding quite noisy?
    9- When bleeding radiators – is the water cloudy
    10- Or is there is no water at all when you bleed the radiators.