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Adjust thermostat on hot water heater
Resources:How to replace electric water heater thermostat
How to replace gas control thermostat
How to increase amount of hot water
Lower the thermostat on hot water heater <> save 3-5% operating cost for each 10° lower
Setting thermostat to 120°F helps prevent thermal expansion, and shortened life or tank and plumbing from high pressure. Resource: Thermal expansion
More chemicals are percolated out of water at high temperatures.
Water stored at 140°F in the tank may accumulate 19 lbs. of lime per year.
160°F in the tank may accumulate 85 lbs. of lime per year.
180°F in the tank may accumulate 135 lbs. of lime per year.
More gasses are separated as water temperatures rise. Air in water line
Calibration: all mechanical thermostats are calibrated approximately.
Actual shut off temperature can vary by +10°F or -10°F
The temperature in lower part of tank can drop by 15-25° before turn on, but upper part of tank will still be hot.
Tank should deliver 70% of tank volume before usable (105°) water runs out.
For more precise control of temperature on electric heater, use PID: Resource: add another thermostat to water heater
Don't touch
or move wires
ECO trip
170°F +/-5°F
control valve interprets
change in resistance as a
change in temperature and uses information to
activate and deactivate call for heat."
