[rwest]

Never heard of that before and can’t imagine that a few degrees makes a difference. Cooking meat needs 160 degrees.

Code in MN for public plumbing fixtures is 120 degrees or less to avoid scalding people.

I keep mine at around 100 degrees because I’m cheap and then I just run only the hot side for showers.

Of course having a warmer temp allows you to blend with cold and therefore you have a longer duration of hot water if you have a lot of usage in a short period of time.

Bottom line, is turn that thing down and don’t listen to that guy anymore, except for flat earth info!