The energy efficiency of a gas boiler is measured on an alphabetical scale of G to A with A being the highest rating and G the lowest.
Some premium boilers may be rated A+ or even A+++. This energy scale indicates how efficiently a boiler converts the gas fuel into heat for radiators and hot water. This measurement system is known as ErP or Energy-Related Products, and was launched in 2009 by the European Union to measure the energy efficiency of all home appliances, including boilers.
Most modern gas boilers have an A energy efficiency rating when new, which means that they operate at 90% or above efficiency. As the boiler ages, the energy efficiency decreases. The UK average efficacy rating for boilers is 80% which is acceptable, but some operate at 60% or less and this will be reflected in higher energy bills.
The following is an indication of how energy efficiency reduces with age:
Boiler Age Efficiency % Rating
0+ years 90%+ A
10+ years 85%+ B/C
15+ years 80%+ C/D
20+ years 70%+ E/F
25+ years 60%+ G
This shows why a fifteen year or older boiler may need replacing for a more energy efficient model. Modern gas boilers also emit fewer carbon emissions.
Though some reduction in energy efficiency is unavoidable as a boiler ages, an annual service will fix many issues that can reduce energy efficiency.
For a boiler service in Cheshire or if you want your boiler upgraded to a more energy efficient model, contact Xgas.
