4 ms·

> Air source heat pumps are insanely more efficient Citation needed? Efficient how? I'm sure a heat pump designed for a narrow range of input temperatures AND

• sgerenser 6mo ago
  I assuming he means insanely more efficient than they used to be, not more efficient than ground-source (awkward wording though). I suppose they can also be described as more efficient in installation time, cost and equipment than ground source, but clearly not in operating efficiency.
  • wood_spirit 6mo ago
    Yes air source are really good value in cost effectiveness terms, especially when a house has an existing central heating system they can connect to. But their COP - whilst dramatically improving in the last 10-20 years - is still behind ground source, particularly in the north during winter