According to the Energy Saving Trust (EST), the boiler contributes almost 60% of the average household energy consumption. Therefore, the energy efficiency rating of a boiler is an important consideration.
Simply put, the better the energy efficiency, the lower the energy consumption (be it electricity or gas) and the lower your monthly expenses of running the boiler system. This becomes even more significant in today’s scenario of ever-increasing energy costs. Of course, for many consumers today, buying an energy efficient device is not merely about saving costs, but also about reducing their individual carbon footprint.
Understanding Boiler Energy Efficiency Ratings
The energy-rating standard for boilers is known as ‘SEDBUK’ or Seasonal Efficiency of Domestic Boilers in the UK. The SEDBUK boiler rating scale ranges from A to G, with G being the lowest energy rating. Since 2010, all new boilers fitted in homes in the UK must have an energy efficiency rating of A (energy efficiency of 90% and above) or B (energy efficiency between 86% and 90%).
Buying an energy efficient boiler makes very good sense. The Energy Saving Trust says replacing an old G–rated boiler in your home with an A-rated boiler could save you £300 per year and reduce emissions by as much as 1,120kg. Given the average boiler lifespan of 15 years, this adds up to a considerable cost saving. Therefore, if you have been chugging along with an old boiler, replacing it with a new one is well worth the consideration.
Here are some quick tips on the energy efficiency of various boiler types:
- Condensing boilers are the most efficient since they re-use the heat from the escaping gases to heat the water. As a matter of fact all new boilers sold in the UK must be High Efficiency Condensing models.
- The installation costs for biomass boilers can be quite high, but you could save as much as £580 in annual boiler running costs.
- Combi boilers are nice and compact, but are mostly incompatible with solar water heating.
Insulation Improves Boiler Energy-Efficiency
Installing an energy efficient boiler will not reduce your energy bills if most of the heat in your home keeps escaping. It is estimated that 25% of the heat generated, is lost through the roof. Insulating the roof, attic, and walls in your home is a great way to reduce the loss of heat.