I'm looking for something like a simple inline water heater (I imagine would just detect temperature and flow). I'm finding what they're calling "tankless water heaters". The price seems.... high. I only really use hot water for showering, and to be quite honest, I only do so once every 3 days or so. If your diet is good or whatever it doesn't seem to be a problem, and washing off your skin microbiome frequently is bad for you. Just quickly washing off sweat etc is another matter. In that case keeping water hot for your 1 minute shower is even more of a waste. Just an inb4 there, in my case it could be quite a savings to keep the hot water heater off.
Anyone have experience with these? My basement stays like 50F in the winter,. it is absurd to be wasting so much on nothing. But would be obnoxious to go down and use the breaker all the time as well. This would solve both.