air source

Air source heat pumps are a kind of renewable energy technology that take the warmth from the air outside (even when it’s freezing) and use it to heat the home. You can get other heat pumps that do the same thing using the warmth in the ground and in water, but air source heat pumps are suitable for a wider range of properties. Because the air (or ground, or water) is heated by the sun, the energy that heat pumps produce is still classed as ‘renewable’, even though the pump itself is powered by electricity which may or may not have a renewable source.