Hmm I guess, but isn't it going to take a LOT of heat from the miners to reasonably warm up the house. I guess if you can tolerate colder than what you're used to temps during the winter then it's ok.

I think to reasonably heat up a modestly sized house you're going to need to output multiple kilowatts/h of heat. But if you have good insulation you can maybe slowly warm up the house and it will retain the heat for a while.