How do you install a boiler?

Asked By: Sadou BiƱaspre | Last Updated: 24th April, 2020
Category: home and garden home appliances
3.9/5 (348 Views . 28 Votes)
Do It Yourself Boiler Installation
  1. Verify your local building codes.
  2. Choose the type of boiler that best fits your house.
  3. Select a particular supplier.
  4. Fix a budget for the installation.
  5. Decide where you will locate you boiler.
  6. Dress the boiler.
  7. Attach the feed and return pipes to the boiler.
  8. Install the flue.

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Thereof, can I install my own boiler?

It's not technically illegal to carry out DIY gas work in your own home* as long as you are 'competent' to do so, but the consequences of doing so without the necessary skills are hugely dangerous. Working with gas is a complex and dangerous task that requires extensive training, knowledge and experience.

Likewise, how much does it cost to install a new boiler? A) Replacing an existing combi boiler

Installation of a new combi boiler Approx cost with mid range boiler Time taken
1) Replacing an existing combi boiler with a new boiler, in the same location £2,000 1 day
2) Replacing an existing combi boiler with a new boiler, in a new location £2,600 1.5 days

Furthermore, what qualifications do you need to install a boiler?

To become a Gas Engineer you'll need to pass an industry qualification and gas safe registration. Firstly, an industry qualification could include an NVQ or Diploma in courses such as Domestic Natural Gas Installation and Maintenance, Domestic Plumbing and Heating or Gas Utilisation for example.

How long does it take to install new boiler?

1.5-2 days

37 Related Question Answers Found

Is it illegal to install a gas boiler?

This is a question that gets asked many time, and the simple answer is YES, it is illegal to install your own gas boiler. Every gas safe engineer is issued with a gas safe identity card that displays a picture of the person in question, he will also have a unique licence number.

Do you have to be Gas Safe registered to fit a boiler?

A non-registered person may carry out 'wet work', ie install water pipes and radiators for a heating system, but any work on the gas boiler itself and the final connection of the water pipework to the boiler, must be done by a Gas Safe registered engineer.

Can I install a combi boiler myself?

Is it possible to install a combi boiler by yourself? To follow building and safety regulations, new gas boilers need to be installed by an installer with a Gas Safe certificate. However, a reliable engineer will likely be hesitant to commission a boiler that they have not personally fitted.

Can I install my own central heating system?

While it is possible to install the whole system on your own, it is recommended to have it done by a professional installer due to the complex nature of central heating.

Can you put a boiler in a garage?


Yes, it is possible to install the boiler in the garage with the pipes running underground. This would have to be done in accordance with regulations. Also, a frost protection device needs to be fitted in the garage to avoid the pipes freezing up.

How do I check a gas safe number?

To check if an individual engineer is currently Gas Safe registered you will need to know their unique 7-digit licence number. You will find this on the engineer's Gas Safe ID card.

Can a plumber install a boiler?

Although they may be highly experienced in the full range of plumbing such as leaky pipes, dripping taps and dishwasher installation, plumbers are not necessarily qualified to work on a gas boiler. Some plumbers are also Gas Safe registered, however, but this should not be expected as standard.

Where should a boiler be placed in a house?

Boilers could be located in various rooms throughout a property, but most commonly they're installed in either the kitchen, bathroom, bedroom or utility room.

Where can a combi boiler be fitted?

4 Places Where You Can Relocate Your Combi Boiler
  • Your attic. Typically, your attic is a space that you don't really get much use out of.
  • The garage. This is becoming quite a popular option.
  • A basement or outhouse. This can be a great option for anyone who's thinking about maybe building an extension, or renovating their home.
  • A storage cupboard or utility room.

What size boiler do I need?


As a rough estimate most flats, apartments and smaller houses, with up to 10, average size radiators and 1 bathroom* will require a 24 to 27kw Combi Boiler. For a medium to large 3-4 bedroom house with up to 15 average size radiators, 1 bathroom and an ensuite* bathroom, a 28-34kw Combi Boiler would be installed.

What boilers do British Gas install?

British Gas is the UK's largest energy supplier and it also installs boilers. British Gas only installs boilers made by either Worcester Bosch, Glow-worm, Viessmann or Vaillant.

How much do boiler engineers earn?

These include CCN1 – Core Gas Safety; CENWAT – Central Heating Boilers; CKR1 – Gas Cookers; HTR1 – Gas Fires; CPA1 – Flue Gas Analysers. Through training, you will become a domestic gas engineer with the ability to work on home appliances.

How long does it take to fit a boiler British Gas?

So how long does it take to fit a boiler? The boiler will be installed within 2-3 days. The installation can take anywhere between 8 hours to a full day, to a couple of days to a week depending on the project scale.

Can you put a gas boiler outside?


You can get external boilers, if you're gas it would be unlikely that regulations would allow you to box it in. So you'd have a large green box on the outside of the flat which I assume you'd need permission for if it's a communal building. You'd basically need a new boiler installed by a qualified engineer.

Who qualifies for free boiler replacement?

Who Qualifies For A Boiler Grant?
  • Automatically Qualify.
  • Pension Credit. Child Tax Credits (Household income below £16,010 per year)
  • Main Benefit. Component.
  • Disability Living Allowance (Higher Rate) Pension Premium.
  • Over 60 years old. Receive disabled worker element.
  • Child under 16. Child under 20 (not in higher education)

Is British Gas boiler installation expensive?

British Gas: Boiler Installation Costs
They fit a tonne of boilers. So, if you've already had a quote, there's a good chance it's come from British Gas. However, regardless of the national firm (British Gas, e. ON, AA and so on), it's unlikely that this is the way to get the cheapest quote.