A kilowatt used to run the refrigerator is equivalent to using a kilowatt to run an electric heater as far as putting heat into a house. Running the refrigerator or any other appliance or light is a higher and better use for generating heat, since you are getting a dual usage.
Think of it as a black box. Any energy that you put into the box, no matter what is in the box using the energy, will result in heating up the interior of the box equivalent to the energy you put in. Entropy. The use of the energy will eventually degrade to heat.
I’ve always thought that when we run out of oil, our great-grand kids will be amazed that we burned oil as a heat source.
Zard
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