I think you are vastly over estimating how much energy appliances need, and how much waste heat that produces. A modern refrigerator for example can consume les

I think you are vastly over estimating how much energy appliances need, and how much waste heat that produces. A modern refrigerator for example can consume less than 1kW per day. The only common appliance that I can think of that produces a lot of unwanted heat would be a dryer. But instead of a gas dryer that sends all the waste heat outside, you could get a condenser dryer with a heat pump which consumes much less energy and hence produces much less heat. From a residential standpoint it doesn't really make sense.