The benefits of Condensing Boilers

Installing an efficient condensing boiler can save you significant amounts of carbon and money:

  • Reduce your electricity bills: Condensing boilers are much more efficient in turning fuel into heat, so you need less fuel to heat your water and home, which can save you over £225 a year on your heating bills compared to a non-condensing boiler.
  • Cut your carbon footprint: Because condensing boilers are more fuel efficient, they reduce your carbon emissions – replacing a G rated boiler will save 1,220 kg CO2 a year.
  • Save space: Condensing combi boilers don’t need a hot water tank, saving you space.
  • Simple controls: Condensing combi boilers don’t need timers for hot water as they produce hot water when you turn the tap on.

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FAQs

Is a combination condensing boiler more efficient than a regular condensing boiler?
A combination (Combi) condensing boiler can be more efficient than a standard condensing boiler because it heats water as you need it. Combi boilers are most suitable for smaller homes, as they can only keep up with a certain level of demand. Non-combi boilers produce hot water and then store it in a cylinder for use as and when. This is still quite an efficient process - but if the hot water is not used immediately, then inevitably some heat will be wasted. It will generally depend on the size and amount of hot water you're likely to need. You installer will be able to advise you which type of boiler best suits your needs.
If I buy a new boiler, does it have to be a condensing boiler?
Yes. Government legislation now requires all new boilers to be the condensing type unless it would be impossible to fit one, which would probably be the case if there was no way to provide suitable drainage.
How reliable are condensing boilers?
Condensing boilers are reliable if well maintained and serviced regularly. A Which? survey in 2011 found that 46% of owners who bought a boiler after April 2005 have experienced some kind of fault. Not all of these faults required a repair. In fact the most frequent problem, a blocked drainage pipe, experienced by 11% of owners, is actually a problem caused by poor installation.
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