Reply #21: Heat pumps are the most efficient electric heat..

[Fumesucker]

But as I pointed out, when the outside temp drops below about 40 F most heat pumps are not very effective.

Depending on your electric rates total electric heat can be extremely expensive, straight resistance electric heat is the least efficient central heating there is.

A commercial grow house is going to have a bill well over $1000, that amount just isn't all that unusual for a largish house these days, it would put me into shock but I know several people that wouldn't blink at a $1000 electric bill, I'm surrounded by new developments of McMansions that probably come close to that on a regular basis. A large poorly built and insulated house can be a real money pit to heat and cool.