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New Boiler Installation Guide: Before, During & After

When you’ve successfully chosen your perfect boiler and agreed for it to be installed in your home, next comes the actual installation.

What happens during a standard installation and what can you expect from our engineer? As well as a professional service, you’ll also benefit from the knowledge and experience of our expert boiler engineers.

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Price Guarantee[28]

Simply answer a few multiple choice questions about your existing boiler and we’ll give you a fixed price for a new boiler including all parts and installation[28]

At Help‐Link we make the journey to a new boiler a smooth one. When you give us a call or fill out a form on our site this is what happens next…

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FAQs Prior To Install

We've compiled a few of the most commonly asked questions that we get from customers prior to a new boiler installation & provided answers so you can make an informed decision when it comes to choosing a new boiler.

Can I install a boiler myself?

It’s important to understand that you shouldn’t install a boiler yourself. For good reason, every boiler installation must, by law, be carried out by a Gas Safe registered engineer who has gone through professional training.

Anyone who tries to install a boiler without the relevant qualifications may be putting their home and family at serious risk.

Even if you think you’re quite handy with tools and you’re an experienced DIY‐er, this is a job that should be left to the professionals, such as the qualified engineers available up and down the country through Help-Link.

Do you want a water cylinder or have a high demand for hot water?

If you live in a home with multiple bathrooms then it is most likely you will need a water cylinder to store and heat water to send to your taps when it’s needed.

A combi boiler may not be the most appropriate boiler option for homes with a high demand of hot water because they may not be powerful enough to fulfil demand. If you live in a large home with many bathrooms a system boiler may be a much better option for you.

Do you want your heating and hot water controlled from the same system?

If you’re concerned about saving space in your home and want to combine your heating and hot water into one compact system then a combi boiler could be the best option for you. Unlike other types of boilers such as conventional and system, a combi boiler will control your central heating from one compact unit. This means your taps should always run hot soon after they have been turned on as you don’t have to wait for a water cylinder to heat up.

Where do you want your boiler located?

The location of your current boiler may have an impact on what replacement boilers are most suitable. You can choose to change the location of your boiler when installing a new one, but it’s important to be aware that this can come at extra cost. If you want to keep the price of your boiler replacement down then it is best to get the new boiler installed in the same location as your old one. You can install a boiler in most rooms in a house as long as the property’s pipework allows it. Many people choose to have their boiler installed within their kitchen or inside a cupboard.

Which type of boiler is the quickest and less disruptive to install?

People generally find that swapping to an energy efficient boiler is beneficial in the long run, despite any disruption that can be caused during installation. If you’re having the same type of boiler installed in the same location as your existing one then you may see very little disruption.

Changing the type of boiler that you have could be more disruptive and take longer to install. For example, it is much quicker to swap a combi boiler with another combi boiler than it is to swap a system boiler with a combi boiler.

Once you’ve established your central heating needs and know the type of boiler you want, the next step is to decide on the boiler brand and model.

The Cost Of A New Boiler Installation

The cost of a new boiler installation varies greatly depending upon your circumstances and which boiler you want to go for. In this section we've explained some of the factors that go into determining the price of your new boiler installation.

How much does a boiler installation cost?

There’s no fixed rate for a boiler installation. All kinds of factors could play into the cost, including where you live and whether you’re having a traditional or combi boiler installed, if it will run on gas or electricity, and potentially what brand it is. If you’re interested in finding out how much it will cost for a new boiler then it’s best to answer a few quick questions using our quote system.

The cost of the boiler installation usually includes everything you need: the boiler itself, removal of the old one, and any charges for flushing the old system, doing plumbing work and moving pipes. Be sure to check what is included as part of your installation.

Here are examples of such factors which are likely to increase the boiler installation cost.

Type of boiler

If you are replacing one type of boiler for a different one (e.g. a conventional to a combi boiler, or vice versa) there will be significantly more work involved in changing them over. You can therefore expect a higher cost for installation than you would if you were replacing your boiler with one of the same type.

Boiler brand and model

We offer a range of boiler models from quality manufacturers. The cost of your boiler replacement will also largely depend upon the brand and model you choose. Although it might be tempting to go for the cheapest option, investing in a higher quality and more efficient boiler could save you more money in the long run. By contrast, premium range boilers are usually higher quality, more efficient and could have a longer lifetime.

Take a look at some of the brands we work with:

Worcester Bosch

As part of the Bosch Group, Worcester Bosch boilers are designed and built to exacting standards and constructed with only the highest quality materials, to provide the levels of quality and service that you would expect from a brand within the Bosch Group. Learn more about our Worcester Bosch Boiler range.


Vokèra specialise in the domestic and light commercial market and provide products that fulfill modern requirements. Their range incorporates a product for every domestic use, including high efficiency combination, system and open vent boilers, light commercial boilers and water heaters and cylinders. Learn more about Vokèra boilers.


All Ideal boilers are ‘A’ rated for efficiency, simple to maintain and supported by a customer service team. Ideal boilers even come with a number of prestigious accolades; including a Product of the Year award in 2014 and reader recommendations from Good Housekeeping magazine. Learn more about Ideal boilers.


Vaillant have a wide range of boiler options available to suit the needs of your home. The Vaillant EcoTEC plus boilers are available in a variety of options and styles and are a great choice for a new combi boiler. Vaillant’s range of combi boilers have the revolutionary EcoTEC technology, ensuring that you benefit from a powerful, reliable and efficient heating and hot water performance whenever you need it. Learn more about Vaillant Boilers.


Baxi not only manufacture combi boilers, they also offer system, heat only or back boiler options so that you can find the perfect Baxi boiler to suit your home. Learn more about Baxi Boilers.

Positioning of your boiler

Unlike 30 years ago when boilers were usually floor standing, the majority of boilers now are wall mounted. Changing from a floor standing to a wall mounted boiler may come at an additional cost, so it’s worth checking what this will be with the installer you choose. However, if you are wanting to reposition your boiler to a different room or wall, then additional pipe work will be needed.

Consequently, this will add to the cost of your new boiler installation. Our surveyors will advise on the best position for your new boiler and tell you if there will be any additional cost, so you can make an informed decision.

Your current boiler and central heating system

If your boiler and central heating system have not been replaced or serviced regularly in 10+ years, it is highly recommended to perform a power flush during the installation of your new boiler to get rid of any dirt or sludge in your system which could cause severe damage. A power flush does come at an additional cost to the initial boiler replacement, but can make a valuable difference to how efficiently your boiler and heating system works and prevent damages or breakdowns.

We go through an extensive survey process to determine which boiler is the best fit for your home and the complexity of the work involved, to give you an accurate quote for your new boiler installation cost.

Get a fixed price quote for a new boiler installation[28] online now by simply answering a few multiple-choice questions about your existing boiler.

The Installation Process

What happens before the installation?

Before the day of the installation, one of our surveyors will arrange a time with you to check several things, including:

They’ll advise on the best way to install the boiler. If you’re happy with what they propose, you can then discuss your payment options and also a date and time for the engineer to install your new boiler, which we’ll confirm with you by email and phone.

Our boiler engineers

All our engineers are on the Gas Safe register, which means that they’re qualified to install and repair gas boilers. You’ll find they have a number of other accreditations to their names as well, including CHAS – the contractors’ health and safety assessment scheme.

If you’d like to learn more about our staff, including how friendly and knowledgeable they are, we have information about their training and what they’re like when they visit your home.

What happens on the day of the installation?

Our engineer will come to your house with everything they’ll need to carry out the work for the boiler installation at the time and date agreed beforehand.

You’ll need to be at the property to allow our engineer access. Your engineer will talk you through the extent of the work they’ll be carrying out, so you know what to expect when it’s going on and after the work has been completed.

What happens during the boiler installation?

Before our engineer even starts work they’ll lay down dust sheets and carpet protectors to keep the mess to a minimum.

While the engineer is hard at work, you don’t need to be at the property. An average boiler installation may take around a day or two to complete, so be sure to check when you need to be back at your home so they can talk you through how your new boiler works.

As well as conducting the installation of your boiler, the engineer may also need to carry out what’s known as a power flush. This is an additional process which simply gets rid of any debris that may be lying inside the system after the boiler has been put together.

What about after the installation?

Our engineer will test your new boiler to check that its working as it should be, and they will also clean up the area where they’ve been working, making sure it’s as clean and tidy as it was before the installation began.

They’ll walk you through all the controls, showing you how to operate it, so you don’t have to worry about getting to grips with it all by yourself.

At a later time you’ll receive a call from a member of our dedicated customer service team, who’ll ask you how it all went and whether you were satisfied with the engineer and their work.

Your boiler warranty

Buying a new boiler through Help-link means you could benefit from up 10 years warranty The exact information about your warranty will be inside the Help-Link care pack you’ll receive after the installation is complete.

In order to keep your manufacturer’s warranty valid you’ll need to have your boiler serviced each year. You can book an annual service with us – whether it’s for a gas or electric boiler – to ensure you keep your warranty intact.

Aside from your boiler’s warranty, you also have the peace of mind of our guarantee. When we install your boiler, our work is guaranteed for the next 12 months. This means that in the unlikely event that any mistakes have been made we’ll be out to fix it for free.

If you have any other queries about our boiler installation process, you can contact us using the form at the bottom of the page, or call us on 0203 841 5320 .

Want to talk your boiler options through?

A boiler is a big decision. If you want to talk through something in person, simply fill in the form below to give us an idea of where you are and one of our local advisors will give you a call back quick-sharp.

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