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Boilers with Lowest CO2 Emissions
We’re all meant to be concerned with our carbon foot print these days and whereas there’s lots of talk about buying a smaller engined car, or going on jet aircraft less, there is something closer to home we can all do: make sure we have energy efficient boilers to run our central heating systems.
Despite global warming, the U.K. is basically a cold country and domestic boilers are on, either providing heat, or hot water, for a large proportion of the year.
An energy efficient boiler has less Co2 emissions than an old, or inefficient boiler (in the region of 30% less). And as boilers can account for as much, if not more than 60% of Co2 home emissions and cause you to pay nearly £300 more a year in bills, then it’s worth taking note, both in terms of the planet and your wallet.
So, the best boiler to choose (and one which effectively you have to choose these days, by law, unless there is a good building reason not to), is the highly efficient condensing boiler with proper heating controls.
A modern condensing boiler should have a SEDBUK rating of A, or B, which means it is more than 86% efficient. SEDBUK stands for Seasonal Efficiency of Domestic Boilers and is an accepted rating scheme for all new boilers. A SEDBUK rating represents an average annual efficiency rating of a domestic boiler which runs in a typical house, having made certain assumptions including usage pattern, control mechanisms and climate.
A modern condensing boiler is so efficient because it uses not only the heat from the primary fuel source, gas, or oil, but because it also extracts the heat from the exhaust gases as well; meaning you get two bites of the cherry. The downside of this great efficiency is extra installation costs, as grabbing heat from the exhaust gases not only means the removal of the resulting fluids from the flue which requires pipes and drains, requiring the flue on an outside wall, but also a fan in the flue to help draw out the fumes.
So, when it comes to having your boiler specified, ensure you check the SEDBUK rating: it has to be an A, or B, unless your installer cannot fit a condensing boiler onto an outside wall. With around 30% less emissions and maybe a £300 saving a year on fuel costs, it has to make sense.
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