Air Source Heat Pumps work by extracting energy from the air and converting it into heat for your home. They can work with existing central heating systems or underfloor heating. Heat pumps do require some electricity to run, but with conversion efficiencies of between 300 and 500% (meaning that, for every unit of electricity used, you get 3 to 5 units of heat), it is a far more efficient and renewable way to heat your home.