Now if you were to get a window air conditioner (heat pump) and put it in the window backwards then you might put 1000W of electricity in and get 2000W or more of heat out. But a window AC won't come on once the outside temperature falls below a certain point.
With this and your BTC guild posts, we can safely conclude you really are mad
Not to detract from Joel's post, but to add to the silly side - obviously you should put your miners outside blowing onto the AC unit so it doesn't get cold.
On the proper side - I am enjoying winter and the rigs keep the place nice and tropical.