The Ultimate Guide To Combi Boilers


Combi boilers are by far the most popular boilers used within the UK today. With more and more households using them, advances in technology means that leading manufacturers are always looking at ways to improve their products. At Greener Homes we are experts in new boiler installations. In our latest article we have devised the ultimate guide to combi boilers.

What Is A Combi Boiler?

A combi boiler or as it is also known, a combination boiler is a highly efficient heating system used in people’s homes. The compact and single unit system is great for those that need a space saving solution. Without having to compromise on heating and water needs. A combi boiler does not need a water tank due to being able to draw the water directly from the mains system. Over 75% of homes in the UK choose this type of boiler making it the most popular heating solutions on the market today.

Why Choose A Combi?

When it comes to having a new boiler installed, the combi boiler is still the most popular option. The advances in technology from all of the major brands in the industry has meant that with a combi boiler there are a number of benefits that you will be able to take advantage of. Some of the reasons people therefore choose a combi boiler include the following:-

  • Unlike system or traditional boilers they are a single combined unit. This means there is no need for an extra water tank. Which is perfect for those who do not have a lot of spare space within their home.
  • Being an all in one unit also means that installation times are reduced.
  • Production of hot water on demand is key so that you are able to draw on what you need and when you need it. No waiting around for the tank to refill.
  • Taking water directly from the mains supply means that you get a higher pressure. Perfect for those that have showers they need to power.

The above reasons are some of the main points to why people choose a combi boiler for their home. A combi boiler is a great option if it does fit your demands.

Are They Right For You?

Before settling on a combi boiler there are a few things you need to consider. This will help you to understand if it is right for your home, or if a system or traditional boiler is going to be better. These consideration points include the following:-

  • Your home is particularly large or has several bathrooms. If this is the case then a system or traditional boiler will be better. As a combi boiler draws directly from the mains and may have to divide the supply ultimately making it weaker. 
  • The mains pressure itself is weak. There making the flow from the mains a lot less powerful.

Getting the right boiler for your home is super important. This is due to each boiler being able to cope with a different set of demands being placed on it. Consult your heating engineer beforehand to see what they think is going to be best.

What Size Do You Need?

One of the most important parts about choosing a combi boiler is getting the right size. Now this does not mean to fit in a cupboard, but the actual output power. Without the correct output power your boiler may not be able to cope with your household demands. Therefore meaning that the boiler needs to work doubly as hard in order for it to be effective. 

Alongside being able to keep up with your hot water requirements you need to ensure that the boiler you have is able to deal with the mains pressure as it flows through the boiler. To make sure you get this right, a registered heating engineer will be able to perform a series of checks. 

As mentioned previously, the size of the house will also be a deciding factor on what size boiler you need. An idea of these sizes in relations to homes is as follows:-

  • Small house or Flat (1-2 bedrooms) with 1 bathroom = 24 – 27kW
  • Medium house (3-4 bedrooms) with 1-2 bathrooms = 28 – 34kW
  • Large house (4 or more bedrooms) with 2 or more bathrooms = 35 – 42kW

To Conclude

There you have it, the ultimate guide to combi boilers. A combi boiler continues to be the most popular heating solution there is today, even with the introductions of various other heating methods. Advances in technology have not just made them the most efficient boilers, but also the best to install. At Greener Homes we are specialist heating engineers with a focus on new boiler installations. For more information on our services and expertise please do Contact Us.