How can heat pumps be so efficient?

Heat pumps are much more efficient than gas boilers. Most heat pumps have an efficiency rating of 300%, whereas most new gas boilers are only about 90% efficient.

This means heat pumps can produce three units of energy for every one unit of electricity they consume – in other words, they use much less electricity to heat your home.

Heat pumps are very efficient because they transfer heat from outside into your home, rather than create it by burning fuel such as gas. Heat pumps use electricity to transfer heat, however the quantity of heat delivered into your home is much greater than the quantity of electricity used to power the system.