If your house is small, there are some spiffy little propane fired through the wall furnaces available....one place that has them is Grainger.

YOu could just dump heat in the space that way and run your furnace fan to distribute it.

Also some direct vent fireplaces produce up to maybe 50K btu of heat. That could be used the same way.

Around here resistance electric heat is the most expensive way to heat.

Tom W

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.