If radiant heating cannot be incorporated into your home then consider energy efficient radiant panels. We are all so used to heating systems that fan force or convect hot air into a cold room.
Heated air rises to ceiling level and is quickly cooled by the cold surfaces it touches.
It takes a bit of rethinking to get used to the concept of radiant heating - the heating of surfaces and solid objects, not the air directly. Radiant heat is the way the sun heats the planet. It is an infra red wavelength that radiates from a warmer surface or object to a cooler one without heating the space or air in between . The infra red warmth is absorbed by the cooler object which then becomes warmer. We also lose heat by convection when moving air evaporates moisture from the skin.