Comment on Why I went without hot water for a yearComments−ashishbharthi16yReally nice energy saving tip I received the other day."Reduce your water heater temperature from 140f to 120f. you will not notice much difference and you will not have to mix cold water to bringdown the temperature of really hot water."−paulbaumgart16yhttp://en.wikipedia.org/wiki/Legionellosis#Prevention_of_Leg..."Legionella will grow in water at temperatures from 20 to 50 °C (68 to 122 °F)."130 °F sounds like a safer compromise.−mattmichielsen16yI do the exact same thing. You don't want to go much lower than that though, as your water heater will become a bacteria cesspool.−kscaldef16yAnd you don't risk scalding yourself.FWIW, my tankless water heater cannot be set any hotter than 120.
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Really nice energy saving tip I received the other day.
"Reduce your water heater temperature from 140f to 120f. you will not notice much difference and you will not have to mix cold water to bringdown the temperature of really hot water."
http://en.wikipedia.org/wiki/Legionellosis#Prevention_of_Leg...
"Legionella will grow in water at temperatures from 20 to 50 °C (68 to 122 °F)."
130 °F sounds like a safer compromise.
I do the exact same thing. You don't want to go much lower than that though, as your water heater will become a bacteria cesspool.
And you don't risk scalding yourself.
FWIW, my tankless water heater cannot be set any hotter than 120.