Like you I also used the ac the 1st winter I lived here but it wasnt very efficient and so expensive, I then bought a calor gas heater But the gas ran out every 4 or 5 days! and again didnt warm the room You had to sit in front of it to feel any heat.
Then moved to an old house and installed a sobe which was nice and warm but dirty and too much work,
Moved again this year and bought one of the UFo electric halogen heaters, it has a themostat and didnt seem to eat the electric at all, so for me the halogen heaters seem to be the best