this post was submitted on 15 Jan 2024
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People that cheer about tankless have never had a tankless. They're awful. They can't hold a temperature and are a great way to get scalded then frozen. Tanks are very efficient these days and have none of the usage downfalls, besides being a quarter of the cost.
A properly sized natural gas tankless works pretty well.
Electric tankless on the otherhand take so much power I can't imagine anyone actually installs them in a home.
I've had a 50A unit in a 1BR apartment, and it was fine. Enough heat for showers and for someone to do dishes in the kitchen, or the dishwasher to run. You'd need the larger unit for a home with two showers and four people, but in some use cases, it's really efficient.
I have a gas tankless, and it works really well. When we moved in, I needed to turn the temperature down to prevent the issue you described; It was set at 65C.
Tankless systems should be set to 50C/120F, whereas tank systems are supposed to be hotter to prevent Legionnaires'.