Heat Pumps v Gas Heating
By Paul Homewood
h/t Joe Public
One way to decarbonise domestic heating, which the government has been pushing for a while through its RHI scheme, is the use of heat pumps. Joe sent me the link to the Energy Saving Trust website, which offers advice.
According to them, air source heat pumps can cost in the region of £7000 to £11000, and offer the following savings:
Rather dishonestly, the Trust use inefficient non-condensing boilers as the benchmark, even though very few households have them anymore. Even then, there is no financial justification for switching from gas, especially as the Trust point out that heat pump maintenance is not factored in.
There are also question marks over whether heat pump technology can cope with water heating, or very cold weather, thus necessitating supplementary systems.
The story is similar with ground source pumps, which are dearer, but offer better fuel savings. These can cost between £11000 and £15000, with fuel savings of: