Yes, they are awesome for heating your house... if you are deaf and like to breathe formaldehyde 
I live in Canada, it is -13 C today. Asics and gpu rigs in basement.
My furnace has not come on once this winter.
4000 sq foot stone house built in 1883, no insulation in walls.
Balloon frame design, drop a screwdriver inside the wall while doing work on the second floor and it will fall right to the basement.
Single pane glass windows.
House sits at a constant 62 F 24/7.
No, I do not have a wood stove. Forced air gas is all I have for heat (which I dont use any more.)
Electricity bill about $900 per month.