Asked by: Ismaila Zschoge
home and garden home appliances

How many watts does a tankless gas water heater use?

Last Updated: 21st April, 2021

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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

Related Question Answers

Rebecka Haizel

Professional

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).

Segismundo Tiedjens

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What size breaker do I need for a tankless water heater?

Typical tankless requires 40-50 amp breaker for each wire.

Abdelwahed Ruhlov

Professional

Do I need electricity for a gas tankless water heater?

It may be obvious that electric powered tankless water heaters won't work without an electrical supply. However, natural gas and propane tankless water heaters rely on electricity as well, and won't work without electricity.

Iurie Ertl

Explainer

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%.

Iakov Berglehner

Explainer

Is a gas tankless water heater worth it?

Tankless water heaters save money in the long run, but initial costs are higher than tank models. Tankless water heaters cost up to three times more than storage heaters — from less than $1,000 for an electric, whole-house model to $3,000 for a gas-powered one, including installation by a qualified plumber.

Yiyi Garcia Arias

Explainer

Does a tankless water heater need its own breaker?

A tankless water heater will require a dedicated circuit as specified by the installation manual of the unit that has been selected. If you need additional space in the panel for the circuit breaker then a quad circuit breaker may be allowed as specified by the make and model of the panel.

Samy Solivellas

Pundit

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

While on-demand gas water heaters don't rely on electricity as a fuel source to heat water, on-demand heaters usually have a control panel that is powered by electricity which is the 'brains' of the water heater. So even a tankless gas water heater will not work independently in a power outage.

Eunice Ellman

Pundit

What is the best tankless water heater?

7 Best Tankless Water Heaters Reviewed
  • Rheem RTEX 13 Electric Tankless Water Heater.
  • Stiebel Eltron Tempra Plus 24 kW.
  • Rinnai RUC98iN Ultra Series, Concentric/Twin Pipe Installation.
  • Atmor AT-D18TP-AZ Instant Tankless Water Heater.
  • Ecosmart ECO 27 Tankless Water Heater.
  • Rheem RTGH-95DVLN Direct Vent Tankless Water Heater.

Jinbao Thielcke

Pundit

Should I replace my water heater with a tankless?

Because there is no tank of heated water continually having to be kept hot, tankless water heaters don't experience the same standby energy losses that traditional tank water heaters do. Most traditional tank-style water heaters will have an energy factor of about . 67, and will use about 225 therms/year.

Martina Taberner

Pundit

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.

Chu Chiluisa

Pundit

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.

Ulf Anderton

Teacher

Can you install a tankless water heater yourself?

Can I install a Rinnai tankless water heater myself? Rinnai recommends you work with a licensed contractor trained to handle the plumbing, gas, electrical and venting aspects of installing a tankless water heater. This expert should be aware of all local and national codes.

Matene Peñuelas

Supporter

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

Running an electric water heater off a generator is impractical. You would need a 10,000 watt generator to run your well pump and hot water heater at the same time. Then 80% of the time you would have that large generator running drinking gas like crazy when it has barely any load on it.

Crispin Viraf

Supporter

Will a 7500 watt generator run my house?

With a 7500-watt generator, you can power up most household appliances including your refrigerator, hot water heater, well pump, freezer, light, and oven. A 7500- watt generator will get you through your next power outage in comfort.

Fana Bagalin

Supporter

What can I run on a 2000 watt generator?

A 2000 watt generator could power a 500 watt deep freezer and one element of the electric stove. Or you could run the freezer, cook with a 650 watt microwave (using 1000 watts) and a few lights. The typical electric range with 8” elements will use all 2000 watts if you use it while connected to the generator.

Malick Wassmann

Beginner

How many watts does a TV use?

How much electricity does my television use? Most TV's use about 80 to 400 watts, depending on the size and technology. Using a sample cost of 15¢ per kilowatt-hour and five hours of viewing a day, that's $1.83 to $9.13/mo.

Shakir Lepikhin

Beginner

What size generator do I need to run a refrigerator and freezer?

For example, if you want a generator to run a refrigerator and a freezer, the wattage (table 2) of the refrigerator would be 800 and the freezer would be 1,000. To select the correct size generator, you decide if both refrigerator and freezer are to start at the same time. If so, you would need (1,800 X 4) 7,200 watts.

Macarena Gallacher

Beginner

What appliances will a 3500 watt generator run?

What appliances can a 3500-watt generator run?
  • Energy saving LED or CFL lights which consume about 14 watts each.
  • A freezer, which on average consumes about 700 watts and needs 2100 to start.
  • A refrigerator which needs 2100 to start and on average consumes 700 watts.

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