only in the winter..... it saves me money on my heating bill. i leave one cooking in the living room, one in the den, and one at the foot of the bed when i go to sleep. then in the morning i throw all three of them in the boiler and me and nelson wait for them to merge as we ride to work.
Honestly i've never tried, but can imagine the amount of heat produced during the proccess. (sorry for my ill humor today)