Thanks for this bit of research.
This reminds me of something I’ve wondered about…
What is the best/easy method for checking on and verifying what temp the water is actually getting up to in a water heater?
I know I could let the faucet run for a minute, and put a thermometer under the running water stream, but is that it, or are there more sophisticated methods?
I assume with that method, there is some sort of equation I’d have to use to adjust for the distance from heater to faucet, and for whether the pipes have insulation or not, etc.