ᐅ Lowering the Hot Water Temperature in a Single-Family Home

Created on: 8 Aug 2022 09:43
I
In der Ruine
Hello,
in many discussions here, I have read that lowering the hot water temperature can save energy because there is generally no risk of Legionella bacteria in single-family homes.
Now the question is, is this also scientifically proven? My wife is really concerned about this and would like to have well-founded expert knowledge.
We have a 300L (79 gallons) hot water tank, three taps that are all used daily, and we also shower every day. In my opinion, lowering the hot water temperature is an economic mistake, and I want to adjust the temperature so that during the hottest showers the water heated in the tank can be used directly without mixing in cold water.
Is this really safe? Our old gas boiler does not have a Legionella prevention program.
Thank you for your evidence-based responses.
F
fach1werk
12 Aug 2022 22:31
Why not do a trial run and have water samples tested? What is acceptable for the health department might also be satisfactory for a cautious wife.
If it is an older building, I would also have it checked whether there are old, unused pipes that could be removed.