Boiler installation

Boiler installation might seem to be as simple as replacing your old boiler with a new one. There are, however, few things you should keep in mind that may affect the installation of your boiler.

Getting a new boiler might be a tedious task. But don’t worry. Let’s Heat can help make this an easy process. We have prepared a complete guide to help you get the right boiler for your home.

A boiler is one of the most important things in any modern home. It supplies your outlets and your heating system with hot water.

We know how tiring it is to go shopping for a new boiler. The process can be complicated and expensive. However, with Let’s Heat, you can just check know everything there is to know online.

We will try to sum up the most important factors you need to know in order to buy what you exactly need.

You might want to know how long does it take to install a new boiler and who can fit a new boiler. On this page we’ll cover what you need to know about boiler installation and what things are involved.

What are the procedures of new boiler installation?

Affordable Boiler Prices

There are several and different processes involved in installing a boiler. These depend on the complexity or complication your installer might face during work.

The number of steps differs of course. For instance, replacing a like-for-like combi boiler would require fewer steps than replacing a combi boiler with a system or a heat only boiler. Changing the location of your boiler might also mean more work and extra steps.

Aside from how complicated the work can be, three main steps are necessary for your new boiler installation.

First Step: Removal of the old boiler

Before a heating engineer can start with the installation of your new boiler, the old line will need to be removed.

This can be made easier for me them if you clean the space around your boiler to make sure that they have an easy access to your boiler.

If your boiler is fitted in the attic, then it should be accessible via a set of stairs and a safe walkway, and the room should be lit sufficiently. For a more complicated boiler fitting or the relocation of a boiler, the heating engineer may need to remove old pipework and radiators, before installing the new boiler.

Second Step: The installation of your new boiler

After the removal of the old boiler and pipework, the heating engineer will start with the installation of your new boiler and its pipework. This step might be extremely quick, depending on how much work is needed and how complex the job ahead might be. It will not take a long time if you are getting a like-for-like boiler.

Third Step: New boiler product tour

A product tour will take place after the completion of the installation process. A heating engineer will check to make sure that your boiler has been properly installed. Then he will show you the ropes. You will be instructed on how to use the controls, the features of your new boiler and how to set a schedule for your boiler to be turned off and on. Make sure to ask the heating engineers about anything that you might need help with. Taking notes might also help you in the long run to maintain your new heating system.

Installing A New Boiler

What follows the boiler installation process?

After the installation of your new boiler, you should make sure that the heating engineer provides you with a Building Regulations Compliance certificate. This certificate confirms that the unit has been safely installed, and that the installation of your boiler has been registered with the manufacturer to validate the warranty as well. Most manufacturers request that this takes place within 30 days of installation.

In order to keep your warranty valid, your boiler should be serviced annually by a Gas Safe registered engineer. This means that they will inspect your boiler inside and out, checking the flue pipe, ensuring that the gas pressure is correct and checking how the boiler performs during operation.

What are the types of gas boiler replacement?

If you’re getting a new boiler, then you should know that there are three major types:

Combi boilers

  • Their compact design makes them perfect for homes with limited space
  • Do not require a hot water storage cylinder or a cold-water tank
  • Unsuitable for homes larger homes with multiple bathrooms and a high demand for hot water
  • Not suitable for areas with low mains water pressure

Regular (heat only) boilers

  • Good for homes with multiple bathrooms and a high hot water demand 
  • Perfect for areas with low water pressure from the mains
  • Suitable for homes with older heating systems that may not be able to tolerate high pressure
  • They take space since they need a cistern tank
  • A tank in the attic can freeze in winter and might cause many problems if it starts leaking

System boilers

  • Also recommend for homes with more than one bathroom and a high demand for hot water
  • Do not need a tank in the attic
  • Internal components can make installation much easier.
  • Unsuitable for areas with low water pressure 
  • Not suitable for homes with traditional heating systems that can’t tolerate high water pressure 
  • You need to consider where to put the water tank if a system boiler is replacing your combi boiler.

Read Also : Boiler Installation | Boiler Replacement – Smart Adapt

Which boiler brand to choose from?

We offer a variety of different boilers from different brands. You can take a look at some of the types we offer down below:

Viessmann Boilers

Viessmann boilers have won plenty of awards. They have a reputation for being technically superb. 

With its superb German engineering and simple, crisp designs, it has a 5-star reputation. Needless to say that it dominates the European boiler market.

Worcester Bosch Boilers

When it comes to boiler, then rest assured that Worcester Bosch is a household name. It is an award-winning boiler.

It is the best boiler brand in the UK thanks to their excellent guarantee offer, customer service, and easily sourced parts.

Alpha Boilers

Over the last few years, Alpha has increased its share of the market due to it being a budget-option for many customers.

It is a fantastic option for people who are looking for a reliable yet affordable boiler.

Installing A New Boiler
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What is the cost for a new boiler installation?

The first thing you might think of when buying a new boiler is the possible cost. Boilers can be expensive but getting a good boiler is a good investment, new boiler installation cost.

You will of course want your boiler to be efficient and to last for years to come.

The price for a new boiler replacement can vary, depending on many crucial elements:

  • The type of boiler you want to install in your house (e.g. combi, system or regular)
  • Moving you boiler to a different location
  • The model you aim to buy (e.g. mid-range vs. premium)
  • Converting your current boiler with another type (e.g. system to combi)
  • The extras you get (e.g. filters, a controller or smart thermostats)

Without a doubt, replacing you current combi boiler with another is cheaper than converting your system boiler to a combi boiler.

Converting your boiler requires more time, more labour and more materials. Not to mention how complex the whole process is.

Which model you pick also plays a huge role in determining the cost for a new boiler. Here at Let’s Heat, we offer some of the best brands in the boiler industry such as Alpha, Worcester Bosch and Viessmann.

With Let’s Heat you can choose from the multiple ways of payment we offer to our customers. You can pay in cash or get a boiler finance plan that will enable you to pay monthly for your new boiler.

Read Also : New Boiler Quote | Smart Adapt

What is needed for a boiler installation?

Installing a boiler is not something you should carry out yourself. It should be done by a fully qualified professional to make sure that it is installed safely and legally. So the first thing you will need is a Gas Safe registered heating engineer (OFTEC for oil boilers). This is all you will need to do to get a boiler fitted. Our heating engineer will often source the appropriate boiler and needed components themselves.

If you would rather source a boiler yourself to cut costs, it is possible to do so. However, you will still need to hire a Gas Safe registered heating engineer to install your boiler.

Some important factors to consider for a boiler replacement:

As has been noted, a new boiler replacement might not be that cheap. So it’s important to consider some key factors before making your final decision.

The size of boiler you need (kW output)

When we talk about boiler size, we do not mean its dimensions, but rather its power output. The unit of measurement, used for boilers, is the kilowatt (kW).

To clarify, the higher the output of your boiler, the more powerful it will be. Nonetheless, it’s never a great idea to get the boiler with the highest output rating. A too high output rating would increase your energy bills. And a too low output rating will not meet your demand.

Through counting the number of bathrooms and radiators in your home, you can find the most appropriate output rating for you. This information can also help you have an idea of the level of demand for domestic hot water and central heating.

With this purpose in mind, we advise you to get a quote from a Gas Safe registered engineer. If you have a brand in mind, then you should check their website and guidelines. A lot of manufacturers, nowadays, offer advice on their websites.

Read Also : Next Day Boiler Installation – Smart Adapt

 Here is a table to guide you through what you need to know:

No. of bedrooms1 bath & shower2 baths & showers
2-bedroom house26kW29kW
3 -bedroom house29kW35kW
4-bedroom house29kW35kW
5-bedroom house35kW35kW

To point out, small homes with one bathroom and little or no space for a cylinder should consider getting a combi boiler.

Location of the new boiler:

It will cost you less if you install your new boiler in the same location as the old. Moreover, it will make the job more straightforward.

On the other hand, you can move your new boiler to a different location if you want to. But it goes without saying that you will have to pay more. 

The process of moving your boiler requires more work and materials. You will need a new flue installed and new pipework re-routing through your home. This process can be very messy though. 

Energy efficiency:

If you want to reduce your carbon footprint, save some money and keep your house warm and fuzzy, then it’s important to get an energy-efficient boiler. 

At Let’s Heat, we offer modern A-rated boilers that can be bought with a smart thermostat in order to reduce energy wastage.

You can save about £340 and 1,500kg of carbon dioxide a year if you replace your old boiler with an A-rated boiler and set of heating controls according to the Energy Saving Trust.

Best Installation Time:

Some replacement boiler installation takes longer than other. Some are just more complicated than others.

For instance, replacing your combi boiler with another combi boiler might take around 1 day. 

Oh the other hand, converting, for example, a combi boiler to a system boiler is probably going to take 2 days.

What are the regulations of boiler installation?

There are several building regulations that should be followed when installing a boiler. These regulations include finding an acceptable locations for the boiler to be placed, where the flue can and can’t be located, whether the right size of gas pipe has been installed, and whether the boiler has a high efficiency rating. And the list goes on.

There are so many building regulations to follow when installing a boiler. That is why it is best to let an accredited professional do about. You will know that all of the proper regulations have been followed once you get a Building Regulations Compliance certificate from the heating engineer.

The best way to make sure that your boiler installation follows all of the necessary building regulations is by using a Gas Safe registered heating engineer.

Energy regulations:

Over the last few years, the UK has passed some guidelines for boiler installation and energy efficiency:

  • Gas boilers should have at least a 92% ErP efficiency regardless of boiler type.
  • A Combi boiler installation should have one energy-saving feature.
  • You should have functioning time and temperature controls.

How long does it take to install a boiler?

Installing a boiler can take between 1 to 3 days to complete, depending on the complexity of the installation. In short, the more complicated the installation is, the longer it can take. Longer installation can also increase the cost of labour.  Quick installations might take as little as 4 to 6 hours to complete, especially for like-for-like boiler installation jobs.

Read more : Boiler Installation Time

When should you replace your boiler?

Generally speaking, boilers are estimated to last around a decade (10 years). So if you’re boiler is that old, it’s a good sign that it’s time to replace it. 

Additionally, there are other reasons as to why you should get a new boiler. These might be:

Your boiler is old and inefficient 

Boilers that are more than 10 years old are G-rated. They have an efficiency rating of around 70%. As a result, for every £1 you spend, 30p is wholly wasted. Modern boilers, on the other hand, are 90% efficient. 

Your boiler is too expensive to repair

In some cases, broken boilers are very costly to repair. Especially if you need to replace or repair parts like the PCB or the heat exchanger. In short, it might be more cost-effective for you to get a new boiler instead.

Moving your boiler 

If you want to change the location of your boiler, then it makes since to get a new boilers installed with a brand new warranty.

Your boiler can’t meet hot water demands

It might be time to replace your boiler with a new model that has a higher power output if your current boiler is unable to meet your hot water demands.

New Boiler Installation
New Boiler Installation 7

 Can I get the next-day boiler installation?

Yes, you can if you order your boiler before 12 pm during the colder months, and 2 pm in the warmer months.

We provide next-day boiler fitting nationwide in England, Wales and Scotland. So you do not have to be without heating for long, even in the cold months of winter.

Not many boiler companies can install a boiler at such short notice nationwide. If you need a boiler, get a quote from Let’s Heat as soon as possible.

Finance option 

If you find yourself unable to buy a new boiler outright, then you should consider a boiler finance plan.

If you are eligible to use boiler financing, then you will be able to pay monthly for you boiler over the course of 2, 4, 6 or 10 years.

To sum up:                                               

  • No deposit is needed
  • You can make overpayments with no penalty 
  • The ability to spread the cost over 2, 4, 6, or 10 years
  • Interest rates from 9.9% APR


How much does it cost to install a new boiler system?

Depending on how complex the installation is, The cost of installing a boiler can range vastly. You can expect to pay between £500 to £2,500 for a new system boiler. Additional cost may be added for getting your boiler fitted.

What does installing a new boiler involve?

After the installation of your new boiler, you should make sure that the heating engineer provides you with a Building Regulations Compliance certificate. This certificate confirms that the unit has been safely installed, and that the installation of your boiler has been registered with the manufacturer to validate the warranty as well. Most manufacturers request that this takes place within 30 days of installation.
In order to keep your warranty valid, your boiler should be serviced annually by a Gas Safe registered engineer. This means that they will inspect your boiler inside and out, checking the flue pipe, ensuring that the gas pressure is correct and checking how the boiler performs during operation.

How quickly can you get a new boiler installed?

At Let’s heat we can supply and fit your new boiler in 24 hours.

What happens when a new boiler is fitted?

The engineer might do a simple chemical flush or a power flush over several hours for more intensive cleaning. Then, they will adjust the pipework, even reconfiguring it to minimise the heat loss of your boiler. In the end, your engineer will install the boiler at the location you have agreed on, usually in the boiler room.

What is meant by a Condensing Boiler?

The terms condensing and non-condensing can be confusing to people shopping for a new boiler.
Presently, it is stated by law that new boilers must use condensing technology. In short, you don’t have to worry about getting a condensing boiler.

Is it legal to install my own boiler?

Only if you are a Gas Safe registered heating engineer with the required accreditations. Otherwise you definitely should not do it yourself.

Can a plumber install a boiler?

Only if they are a Gas Safe registered heating engineer as well as a plumber.

Do they turn the water off to fit a boiler?

As long as your boiler is in good working order, you should not have to worry about this small risk. A combi boiler should shut down automatically if it detects a drop in mains pressure or if the temperature inside the system gets too high, as would happen without a supply of cold water.

How do I install a boiler in my house?

By enlisting the help of a Gas Safe registered heating engineer.

When is the best time to get a new boiler installation?

There’s not always a right time. However, if you’re planning on replacing yours before it completely packs up, then it is recommend that you do it during the summer months. Summer time is the best because you will be less reliant on heating and hot water so the process should be pain free.