contact

E - info@greentomato.org

Unit 3.11 Q West
1110 Great West Road
Brentford
Middlesex TW8 0GP

How to find us
Tube - Boston Manor Road, Piccadilly Line (20 mins walk)
Train - Brentford Train Station (15 mins walk) Bus - 195, 237, 267, E2, E8, H91
Bike - 45 minutes from central London

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My boiler is 90% efficient; there is almost no room for improvement.

Truth: A “heat pump” can produce 4... read more

My boiler is 90% efficient; there is almost no room for improvement.


Truth: A “heat pump” can produce 4 units of heat for every unit of electrical input. Thus by a conventional definition it is 400% efficient, a big improvement on your boiler! (To avoid confusion, a different measure of efficiency called the Coefficient of Performance, or CoP, is used in heat pumps).


However, the really large fuel bill savings will come from insulating, airtighting and replacing windows in a house to mean that the boiler (or heat pump) does not have to produce so much energy in the first place.