Comment by kaliszad

Sure, ground source heat pumps instead of air source heat pumps. You pull the thermal energy from the ground or e.g. a lake. That has almost a constant temperature all year around starting at a certain depth. These can be extremely efficient, you can get 5-6x the heat per unit of electricity consumed from these. Of course the initial investment is high as you have to drill or otherwise bury the pipes/ hoses into the ground.