Heat pumps
A heat pump is a machine that extracts heat from one place and transfers it to another. The heat pump is not a new technology; it has been used in fridges since the early 1800's.
The likely benefits of a heat pump are:
lower fuel bills are likely, especially if you are replacing conventional electric heating.
lower carbon emissions.
no fuel deliveries needed.
can heat your home as well as your water.
minimal maintenance required.
can be easier to install than a ground source heat pump.