Asked by: Ismaila Zschoge
home and garden home appliances

How many watts does a tankless gas water heater use?

Last Updated: 21st April, 2021

One whole-house tankless water heater has four 7,000-watt elements, for a total electrical load of 28,000 watts. This load re- quires wire and a circuit breaker that will handle at least 120 amps, at a cost many times that of electrical service to a conventional tank water heater.

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Considering this, how many amps does a gas tankless water heater use?

120 amps

will a 5000 watt generator run a hot water heater? A 5,000 watt generator generator is capable of running a electric water heater, but caution should be taken not to exceed the generator's total 5,000 wattage rating. A electric water heater needs 4,500 watts to start the appliance and 3,500 watts to continue powering the heater.

Secondly, does a gas tankless water heater need electricity?

The short answer is, yes, a gas tankless water heater needs electricity to work. Most traditional tank systems also need electricity. If your pilot light is fired up by your power source then you need to be on the grid. Gas, either propane or natural gas, and electric.

How many volts does a tankless water heater use?

120 volts

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What is the downside of a tankless water heater?

Disadvantages include: Tankless water heaters usually can't supply enough hot water for simultaneous uses such as showers and laundry. If a gas-powered unit has a pilot light, it can waste energy (with a conventional water heater, the pilot heats the water in the tank so it isn't really wasted).

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Do I need electricity for a gas tankless water heater?

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Are electric tankless water heaters as good as gas?

A tankless electric heater is generally cheaper than a propane tankless heater. It is important to keep in mind that electric tankless water heaters are generally 99%+ thermal efficient, whereas the efficiency rating of most gas tankless heaters, even the better quality units, range from about 80 to 85%.

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Is a gas tankless water heater worth it?

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Does a tankless water heater need its own breaker?

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Does a tankless water heater work when the power is out?

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Should I replace my water heater with a tankless?

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Do tankless water heaters take longer to heat up?

As long as a large enough water heater is installed, it's not a problem. Tankless water heaters take longer to deliver hot water. Traditional water heaters have hot water sitting at the top of the tank ready to go. On a tankless unit, cold water enters the heat exchanger tubing and begins to be heated.

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How long do tankless gas water heaters last?

Most tankless water heaters have a life expectancy of more than 20 years. They also have easily replaceable parts that extend their life by many more years. In contrast, storage water heaters last 10–15 years.

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Can you install a tankless water heater yourself?

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How big of a generator do I need to run a hot water heater?

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