Comment Re:We need solutions that work in the UK. (Score 2) 132
I live in Michigan; it will be 34 tomorrow morning, and 68 tomorrow afternoon.
Our Daikin cold climate heat pump has no trouble keeping up, or maintaining temperature, even at sub-zero temperatures.
You are correct, they can not handle rapid heating demands, but I have just adjusted the programmable thermostat to account for longer heating times, so by the time I wake up, my house is nice and warm.
More important than the heat pump though, is that we had our exterior walls and attic space re-insulated, and that made a huge improvement.
With the added insulation, the heat pump is more than capable of keeping the house at 72 when it's sub-zero outside, and it can maintain a 68 in the summer when its 95 out.