Oxford study proves heat pumps triumph over fossil fuels in the cold::Published Monday in the scientific journal Joule, the research found that heat pumps are two to three times more efficient than their oil and gas counterparts, specifically in temperatures ranging from 10 C to -20 C.
Hell that’s cheap.
Cheapest quote I ever had was £15k, not including all the improvements to insulation required before the house is compatible…
Mine is air to air.
You were probably quoted ground to air, where they must drill for ground heat?