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Combi boilers: what are they and how do they work?

In the past, all central heating systems provided hot water by heating it up and storing it in a tank until it was needed. In more recent times, we’ve seen a rise in the popularity of combi-type boilers that do away with the storage tank and heat water on demand.

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What is a combi?

Since 2007, all new boilers have had to be condensing types. This means that they reuse heat that would otherwise be wasted via the flue, making them more efficient in fuel use. Typically, a condensing boiler will cut your fuel costs by up to a third compared to an older, non-condensing system.

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It’s important to note that while all combi boilers are condensing, all condensing boilers are not combis. You can still get a condensing boiler that delivers hot water to be stored in a cylinder, and this may be a better choice if you have a larger property, more than one bathroom, or a big family.

If you have a combi boiler, when you turn on a hot tap, the boiler will fire up in order to heat the water. This means that you don’t get hot water instantly. There’s a short delay, but that tends to happen when you are drawing hot water from a storage cylinder, too, so you won’t notice much difference in day-to-day use.

Combi advantages

If you are looking for a new boiler installation Gloucester suppliers such as hprservicesltd.com/gloucester-boilers may well recommend fitting a combi. They will always take account of what is best for your requirements. Combi boilers offer several advantages for most people. A combi boiler takes up no more space than a system boiler, but it can save space elsewhere.

There’s no need for a hot water cylinder, and there’s usually no need for an expansion tank in the loft, either, so you save the space that those items would otherwise take up. This may also give you the chance to relocate your boiler, perhaps to what used to be the airing cupboard. In addition, there is less pipework involved, so installation and maintenance are more straightforward. With a combi boiler, hot water is delivered at mains pressure, so it may well do away with the need to have a pump to get adequate flow from your shower.

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It’s important to note that while all combi boilers are condensing, all condensing boilers are not combis. You can still get a condensing boiler that delivers hot water to be stored in a cylinder, and this may be a better choice if you have a larger property, more than one bathroom, or a big family.

If you have a combi boiler, when you turn on a hot tap, the boiler will fire up in order to heat the water. This means that you don’t get hot water instantly. There’s a short delay, but that tends to happen when you are drawing hot water from a storage cylinder, too, so you won’t notice much difference in day-to-day use.

Combi advantages

If you are looking for a new boiler installation Gloucester suppliers such as hprservicesltd.com/gloucester-boilers may well recommend fitting a combi. They will always take account of what is best for your requirements. Combi boilers offer several advantages for most people. A combi boiler takes up no more space than a system boiler, but it can save space elsewhere.

There’s no need for a hot water cylinder, and there’s usually no need for an expansion tank in the loft, either, so you save the space that those items would otherwise take up. This may also give you the chance to relocate your boiler, perhaps to what used to be the airing cupboard. In addition, there is less pipework involved, so installation and maintenance are more straightforward. With a combi boiler, hot water is delivered at mains pressure, so it may well do away with the need to have a pump to get adequate flow from your shower.

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