do you want to invest

Greentomato comprises four principal divisions: partnerships, education, intellectual property and an investment vehicle.

As well as owning the greentomato businesses, the investment vehicle raises funds for greentomato projects and educational initiatives focussed on green issues.

If you share greentomato’s values and are looking for investment in a project that could fit with our mission, please get in touch.

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.