sure, you could, but it won't take any less energy or somehow use "wasted" energy of these other devices.
This is just what 21co are trying to do with their btc internet of things.
It doesn't make any sense.
21co did a horrible job of it they talk about coming out with every day item's and put miners in the. What did they come out with? One of the worst priced raspberry PI's with a miner combo on top of it.
It is hard to do I honestly see miner for the foreseeable future being machines on their own. There will be projects to do water heater or other thing's but I don't see largescale home appliances soon. Maybe one day just not yet. Right now closest thing you have is using the miner as space heater.