Conserve Gas condensing boiler

Your boiler can use up to 60% of your energy costs so with rising fuel costs, it is vitally important to make sure you have the most efficient type of boiler possible.

A gas condensing boiler uses the waste heat gases from heating your water to preheat the water entering the boiler so there is less of a difference in temperature to get the water to the right heat. This makes the whole system much more efficient. and some gas condensing boilers can have an efficiency rating of as much as 91% which is 25% more efficient than a standard non-condensing boiler.

Gas condensing boiler illustration
12 Maximum lifetime of measure (yrs)

Replacement gas  boilers by law, now have to be condensing models. All new condensing boilers now come with an energy rating from A to G, and If you are replacing a ‘G’ rated boiler with an ‘A’ rated one you would be looking at a saving of up to £310 per year.

How much could you save each year? *

Old boiler rating Semi detached house Detached house Detached bungalow Mid terrace house Mid floor flat
G ( < 70%) £305 £490 £275 £250 £130
F ( 70-74%) £230 £365 £205 £185 £95
E (74-78%) £190 £310 £170 £155 £75
D (78-82%) £160 £225 £140 £130 £60
  • Gas condensing boiler Advantages

  • Reduction in gas bills as boiler is more efficient.
  • Reduce your home's carbon footprint as less fuel is needed.
  • Gas condensing boiler Disadvantages

  • Typical installation of a new boiler is around £2500 so quite a large initial outlay.
  • There will be slight upheaval whilst your existing boiler is being replaced.

Available with

You can get grants for Gas condensing boiler, below are the schemes this is available with.

* According to data sourced from the Energy Saving Trust website.