Home heater:  ancient "Day and Night" nat gas wall heater.  Most of the heat goes straight upstairs :-)  Solution:  in the winter I live mostly upstairs.

Other solution:  in the winter I use the kitchen oven more, which when baking or roasting food, warms up the kitchen very nicely.

Solution to cold bedroom (which I prefer for sleeping actually):  eiderdown and a "dry hot-waterbottle" made of flax seeds in a cotton bag.  Microwave bag for about 5 minutes and enjoy toasty feet all night -- and no spills.

The difference between theory and practise in practise ...