Does A Combi Boiler Have To Be On An Outside Wall?

As a homeowner, you may wonder if a Combi boiler must be on an outside wall. Fortunately, we have done the research for you, and here is what we found.

Homeowners can install a Combi boiler on both the outside and inside walls. However, when filled with water, the wall should be sturdy enough to support the boiler's weight. Also, installing the system in a location that allows the flue to exit the building is recommended.

If you want your Combi boiler to function effectively, make sure to install it in a good place. Keep reading to get detailed information about Combi boiler.

Must A Combi Boiler Be On An Outside Wall?

Gas water boiler on wall. 3d render

There is no set location where to install your Combi boiler. Every home is different, so a well-suited location for your system may vary. You can install a Combi boiler on an outside or inside wall, provided that it is strong enough.

However, there are some rules you should comply with when installing your Combi boiler. Boilers require at least 60 cm of clearance in front of them for routine servicing and maintenance. If the boiler is housed in a cabinet, that cabinet must be fireproof and have adequate ventilation.

As a result, ensure you consult an engineer before installing your Combi boiler. One of the most important rules is regarding the flue position. So, keep that in mind when deciding where to put yours.

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Why Consider The Position Of Boiler's Flue?

It is crucial to consider the broiler's flue because it releases toxic and harmful gasses. Also, there is a required clearance between the flue and any air intakes or windows. The distance is typically 30 to 60 cm, but it can be different depending on the brand and model of your Combi boiler.

Additionally, it is recommended to place the flue some centimeters away from any downspouts, gutters, or pipes. The flue gasses are so hot that they can melt any plastic near the chimney.

Lastly, give your boiler's placement a lot of thought, as there are several factors to consider. Its noise may keep you awake at night if you put it in your bedroom, so pick a convenient location.

Is It OK To Put A Combi Boiler In A Kitchen Cupboard?

Yes, it is possible to install your Combi boiler inside of a kitchen cupboard. However, most boilers have a space requirement between them and the cupboard where they are kept. Additionally, the location of your boiler should not be airtight because air must move all around the system.

Combi boilers are designed to fit within kitchen cupboards, and most models have a compact variant that allows you to tuck it away neatly behind one. A kitchen cupboard close to taps and appliances is ideal due to the constant hot water demand.

Plus, a kitchen cupboard is accessible and allows service, maintenance, and repair work on the Combi boiler. The amount of noise produced is so minimal that it is unlikely to disturb you if placed in the kitchen cupboard. 

Can You Fit A Combi Boiler In A Bedroom?

A Hand Adjusting A Dial On A Home Combi Boiler.

Yes, it is possible to fit a Combi boiler in a bedroom. It works if the boiler is concealed, but there are a few drawbacks to putting your boiler in a private location.

Most modern boilers function with minimum sound, but they will still make some noise which may disturb your sleep. Specific models of current Combi boilers can be installed in a conventional bedroom but require a fair amount of space. You may need more room space for piping.

As a result, you should evaluate how much space you have in your bedroom and whether or not you are willing to give most of it up. If you want to know how much space your boiler needs, consult the owner's manual.

Can You Fit A Combi Boiler In A Bathroom?

Small modern bathroom with wooden ceiling.

Yes, you can fit a Combi boiler in the bathroom. Installing a boiler in the bathroom lets you take advantage of preexisting plumbing, making it an efficient choice. If you decide to put your boiler in the bathroom, adding a towel box is a good idea; the heat from the boiler will keep the towels warm.

However, to avoid breaking the law, you must follow specific guidelines while installing a boiler in a bathroom. The boiler needs to be protected from water to prevent electrical hazards from its placement.

The electrical spur for the system must also be situated outside the bathroom, and the boiler must be inaccessible from the bath or shower to avoid accidents. Also, Combi boilers must be installed following current wiring and building regulations, which detail the many areas where it is safe to install your boiler.

How Do I Install Combi Boiler?

A professional can install a Combi boiler to comply with local construction and safety codes. A professional will examine your property and offer guidance regarding the combination boiler that would work best with the plumbing in your home.

In addition, the professional will check the rest of your heating system, including the piping network and the controls, to ensure that everything complies with the regulations. It assures that their work satisfies the government's legal requirements on safety and quality.

Even if you decide not to hire a professional and instead attempt to install the boiler on your own, you will need the services of a licensed professional to verify, accept, and sign the installation. However, a trustworthy engineer might hesitate to commission a Combi boiler they have yet to install personally.

The following are the steps involved in installing a Combi boiler:

  1. Read the instruction manual carefully.
  2. Trace and understand the pipe routes.
  3. Install the boiler into the wall.
  4. Install the radiator.
  5. Provide ventilation.

Read the following post: How To Turn A Boiler On [Step By Step Guide]

How Long Will A Combi Boiler Last?

Condensing Boiler, Combi Boiler for house heating. Gas Boiler and Boiler Supplies, How Long Will A Combi Boiler Last?

A Combi boiler can heat and provide hot water on demand without requiring a separate tank. Like any other boiler, it is a complex mechanical device that will eventually need a replacement.

The average lifespan of a Combi boiler is 15 years. If you don't keep up with routine maintenance, you will reduce its lifespan. Consider removing the system's cover with a screwdriver and cleaning it often. However, just because your boiler is old doesn't mean it will suddenly stop working.

For your system to reach the expected age, it is always a good idea to service it often. It's less costly and is better than spending a lot on major unnecessary repairs due to a lack of maintenance.

Generally, your boiler is more likely to develop issues after a long time, and getting a replacement could be the best option. The components of your Combi boiler degrade at different rates. It starts requiring to exert more significant effort and consume more energy to achieve the same results it did before.

It is essential to consider the boiler's model, manufacturer, and quality before purchasing. A higher-quality boiler may cost more, but it will save you money in the long run by reducing the likelihood of expensive repairs.

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To Wrap Up

Men hand setting comfort temperature button on control panel of central heating or DHW at combi boiler in restroom.

You can install your Combi boiler on either outside or inside walls; it does not matter. All you should focus on is how strong the wall is and if it can allow the boiler's flue to exit the building. Always make sure to leave some clearance around the system. Don't hesitate to call a professional if you can't install the Combi boiler alone.

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