Can a boiler be installed in a bedroom?

boiler-Installation London
boiler installer London

The short answer is YES, but you have to follow a few health and safety regulations and installation requirements.

Let’s start with the regulation

Regulations to fit the boilers in the bedroom:

  • The new boiler needs to be room sealed so no harmful fumes will enter the room.
  • The gas boiler needs clearances for future maintenance and service.
  • Also, the fresh air needs to circulate in the new boiler for cooling purposes. Check and follow the manufacturer’s instructions for clearances.
  • Check what is the maximum flue distance you can run (in the boiler installation manual) and think about the flue minimum clearances from windows, doors and burning materials.
  • Fit a CO2 alarm above to the new boiler, following the installation manual.

In Gas Safety Regulations 1998, they pointed out that you CAN NOT install a larger than 14kw gas boiler in the bedroom unless it is room sealed. This is mandatory-you have to keep it in mind.

Non-room-sealed gas appliances should be equipped with a device (such as an automatic flue damper) that shuts off the gas supply in the event of a buildup of toxic fumes. The gas supply must be linked with the automated flue damper so that the burner will not light if the damper does not open.

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Why do you need to install a room-sealed boiler in a bedroom?

Boilers need an adequate supply of fresh air to burn the gas correctly. Also, the fan needs to have air circulation purposes operate properly which will take out the byproduct of waste gas combustion from the unit.

An open flue gas boiler will take the fresh air from the room to supply the boiler and the fan will push outside the byproduct. If in any case, the gas boiler fails to push out the byproduct of combustion, this will come back to the room. This is why you need safety devices, so in an emergency like this, the gas supply will be shut so the boiler can not operate anymore.

Modern condensing boilers are room-sealed and have a balanced flue. This means that during heating, the fresh air comes from outside and the dangerous exhaust will be pushed outside by the fan.

Doesn’t matter what type of unit you have. Any parts can fail so we advise you to use a carbon monoxide alarm close to the boiler. This alarm system needs to be fitted at least 300mm from walls or light fittings and 1-3 m from the appliance. The ceiling is the best position you can fit the device.

Things to consider before installing a boiler:

The main thing you have to keep in mind is safety. Installing a boiler in a bedroom has some risk factors. Nowadays all new boilers are room-sealed, so if you would like to install your new gas boiler in the bedroom, you can do it, but you have to consider a few things before the installation. 


Keep in mind that there is no such thing as completely silent or quiet modern boilers. Even modern boilers are noisy sometimes. We not talking about loud noise. We anticipate the time when the boiler will be lit, the heat turned on, and the hot water and heat produced. If you have trouble sleeping or are a light sleeper, having the boiler next to your bed may be an issue.

We have to mention if you have some faults in the boiler, this will be quite a noisy boiler.


Modern boilers are compact, but you still need to take away some space from the bedroom for the pipework and the minimum clearances around the boiler for air circulation gas fire-out purposes.

And if you fit a system boiler installed with a hot water cylinder that needs three times more space than a combi boiler when installed with a combi boiler.

In our opinion, if you have extra space and can choose other rooms, the best place would be the airing cupboard, kitchen or utility room.


It is normal if the boiler in your bedroom is slightly hot when you touch it because it will produce heat while supplying hot water. But if you install a boiler in a bedroom during the summer this can be an issue, especially if you have a small room. In this case, you can box in the appliance and put proper fireproof isolation around it.

But if you find out, that the boiler case is very hot, then you might have an issue. That is the time when you need to call a gas-safe registered company like MML Plumbing Ltd to investigate the issues.

Carbon monoxide

This highly poisonous odourless gas can be produced by any faulty appliance. A faulty boiler can leak carbon monoxide in your bedroom, which is fatal if it’s bred in.

You can prevent this by regular maintenance and yearly service which should be mandatory to keep the warranty. Also use a carbon monoxide detector close to the appliance.

Ready to schedule your annual boiler service with a gas-safe registered engineer? Contact MML Plumbing today at 020 8355 0840. Enjoy fixed and affordable service prices. Don’t wait, book now!

Places where you can install a boiler

If you change your mind and don’t want to install the gas boiler in the same room as your bedroom, here are the areas in the utility rooms of the house which is perfectly safe to fit the appliance:

  • In the Loft
  • In the Utility room
  • In the Bathroom
  • In the garage or shed
  • In the Kitchen

Can you Hide your boiler?

You can build a hidden box for the gas boiler until you follow the minimum requirements:

  • Follow the manufacturer’s requirements regarding clearances.
  • Leave enough ventilation for cooling purposes.
  • Leave enough room for future maintenance and service from the bottom, top and both sides.
  • The box that you build needs to meet fire safety standards. Use fireproof materials.
  • Make sure that everyone in the house knows where the boiler is located and doesn’t block the ventilation. Put a label on the door so everyone knows they can’t block the ventilation.

In a nutshell, you can install a boiler or gas water heater in a bedroom until it meets the minimum safety requirements.

Ensure a safe and professional installation by choosing a gas-safe registered engineer. Contact us today at 020 8355 0840 for expert advice and detailed information on boiler installations.

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