Comments by "Mikko Rantalainen" (@MikkoRantalainen) on "Why Heat Pumps are Immensely Important Right Now" video.

  1. The interesting thing is how different heat pumps work below -15 °C. Some higher quality pumps using R32 refridgerant have COP around 2.0 even at -30 °C which makes them only a bit less effective than burning gas locally but how many days per year do you have at -30 °C? If it's warmer, the heat pump wins every time. We live in Finland and have latest gen split unit heat pump pumping heat into the house and we also have exhaust air heat pump that improves efficiency of the air ventilation (the efficiency of air ventilation gets above 100% when outside temperature is above 3-5 °C because extra heat is transferred to hot water). If you want heat pumps that work in cold climate, look for models intended for Nordic Countries. And check the local legislation for installation – here in Finland it's illegal to install these things by yourself unless you are a certified installer.
    3