Re:The humble water heater could be the savior of our energy...
by cartoonworld on Wednesday July 14, 2021 @09:00AM
(#27832522)
It's controlled in the water heater by maintaining appropriate temperatures. No need to sanitize the fixtures when there is no growth in the tank.
All that other stuff assumes a minmax hot cycle in a waterheater tank.
On demand heaters work fine too.
Where I am, you’re not allowed to deliver water to fixtures higher than 49C (120F), to reduce scalding risk. and this is usually accomplished through a mixing valve at the hot water tank outlet.
11m people live here, haven’t heard of any evidence of increased legionnaires:
https://www.ontario.ca/laws/regulation/r04023