Answer:
Between 77 and 122 degrees Fahrenheit.
Legionella bacteria thrive in water heaters set below 120 degrees, and scalding risk becomes significant for children and elderly occupants at anything above 120 degrees without a tempering valve. The sweet spot is a heater set to 120 degrees with a thermostatic mixing valve at the output. Most water heaters installed before 2005 have neither a properly calibrated thermostat nor a mixing valve, putting households at risk on both ends of the scale.
The setting on your water heater dial and the actual tank temperature are rarely the same number.
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Mr. Rooter Plumbing of Corpus Christi will test your water heater temperature, calibrate your thermostat, and inspect your mixing valve with licensed plumbers and upfront flat-rate pricing. Give Mr. Rooter Plumbing of Corpus Christi a call today.
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