Technology comes at a price. A few shamanistic Native American cultures believed that the price of technology was to high to pay. If a warrior had a heater that means he did'nt have to adjust to the cold. He was weakened. Him being cold would force him to become smarter, to adapt better, to be more resourceful. He may start exercising and thus becoming stronger, he may learn how to start a fire with natural flint and sticks, he may kill a wild deer and cook the meat to warm his bones or climb into the chest cavity for warmth.
I used to do the same thing at my house back in LA but now that Im living with other people for college the temp is always set and I feel weak :(