That would be an air heat pump. Water or earth-exchange heat pumps can work nearly anywhere. This article explains it well: https://www.nordicghp.com/2017/01/h

That would be an air heat pump. Water or earth-exchange heat pumps can work nearly anywhere. This article explains it well: https://www.nordicghp.com/2017/01/heat-pump-effective-temperature-range/ https://www.nordicghp.com/2017/01/heat-pump-effective-temper...