Test # 58
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590 questions in 59 tests. Each test contains 10 questions.
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Water heater timer
A timer turns on the water heater only when you need it, so you dont waste electricity heating and reheating water that sits in the tank.If you only use an electric water heater at certain times of the day, youre wasting electricity keeping the water hot 24/7. To solve that problem, install an electronic timer switch Photo 1; sold at home centers . Timers are available for 120 and 240 volt heaters. They can be programmed for daily or weekly schedules so you only heat the water when you need it.