0800 193 3066


Unit 34 Anniesland Industrial

Glasgow, G13 1EU

Gas Boiler

Gas condensing combi boilers are are by far the most popular choice of boiler in the UK. They are usually recommended because for the average household, they are the most efficient way to provide hot water and heating. Comprising or only one single unit, they are very space efficient and with new technology it is now possible to save even more space with an ultra compact model. Combi boilers are also very simple to install, operate and maintain.

The main reason that combi boilers are more efficient is that water is only heated when you need it. They are designed to maximise the amount of energy that is directly used to heat the water, and there is no need to heat up and store more water than is required. This helps to reduce your carbon footprint and also cut down on your energy bills.
In a gas combi boiler, the word 'combi' is short for 'combination'. It is called a combination boiler because it is a single unit which serves two functions - heating and hot water. One of the key attractions of a combi boiler is that no separate water heater is required. Many older homes had an immersion heater located upstairs in an airing cupboard, supplied by a header tank in the attic. When hot water was required, it was necessary to heat up the immersion heater in advance. As well as being much less efficient than a combi boiler, this system required a lot of space and was impractical.
There are several factors to consider when deciding which size gas combi boiler to buy. The most important factors are generally how much demand there is likely to be for hot water and how many radiators you will be heating.

As a rule, a 20-35kW combi boiler will generally be sufficient for an average 3-4 bedroom house, whilst those with ensuite bathrooms may find that a 30-35kW boiler is more suitable. Much bigger houses will typically need a larger 35-42kW boiler, although it may be worth considering a system boiler as an alternative.

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