WhiningKhan
Regular
I don't see why. They last quite a while, meaning they save money in the long run. So it makes good sense to heavily subsidize them.
What does 'why' refer to? Like I said, the heat pumps are great for replacing old heating systems. For new houses, it's not really that clear.
Around here (Finland), common estimate for the time to pay off the investment to ground heat pump in a new average-sized house (insulated by minimum of current regulations) is around 25 years. The compressor's expected lifetime is usually cited to be 15-20 years. In houses with better insulation specs, the payoff time can get so long it wouldn't really ever pay off. Would you want to encourage people putting less insulation in new houses?