Question: How Much Will A Tankless Water Heater Save A Big Family?


Is a tankless water heater good for a large family?

On average, tankless water heaters can provide 2 to 5 gallons of hot water per minute. For those with large families who go through a lot of hot water, installing more than one tankless water heater is common. This will ensure there is always enough hot water available for showers, laundry and the dishwasher.

What size tankless water heater do I need for a family of 2?

Sizing Guide for Residential Tankless Water heater
Household Occupants Usage Capacity Required (Measured in Gallon)
1- 2 people High 40-50
2 -3 people Regular/Low 40
High 50

What size tankless water heater do I need for a family of 4?

What Size Tankless Water Heater Do I Need For A Family Of 2, 3, 4, 5, Or 6?

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Number Of Family Members: Gas Tankless Heater Size ( GPM ) Electric Tankless Heater Size (kW)
What size tankless water heater do I need for a family of 3? 7-9 GPM 15-23 kW
What size tankless water heater do I need for a family of 4? 8-10 GPM 20-28 kW

Do tankless water heaters work for large homes?

Tankless gas water heaters typically generate higher flow rates for larger homes. But with that in mind, gas water heaters don’t necessarily supply a large number of hot water simultaneously. For example, if you’re taking a shower, and your spouse is doing laundry, this can push a tankless water heater to the limit.

What is the downside of a tankless water heater?

Tankless water heaters produce an endless supply of hot water, take up less space, have a lower risk of leaking, are safer, and have a significantly longer lifespan on average. The main disadvantage of tankless water heaters is their upfront cost (unit and installation) is significantly higher than tank-style heaters.

Can you run out of hot water with a tankless water heater?

Endless Supply of Hot Water A tankless water heater heats up water as you need it, and it brings hot water to your appliances quickly—and never runs out.

How do you know what size tankless water heater you need?

How to Select the Right Size Tankless Water Heater

  1. Determine the maximum number of devices you want to run and their total flow rate. Then, add up their flow rates (gallons per minute).
  2. Determine required temperature rise.
  3. Sizing Example: An average shower will be between 104–106° and uses 2.6 gallons of water.
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How long does a tankless water heater 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.

What size BTU tankless water heater do I need?

If you need to provide a whole house with hot water and your peak water demand is high, then you’ll need up to 200,000 BTU. If you only need a couple of low flow fixtures at once, then you can go with lower BTU since it will consume less.

How often should a tankless water heater be flushed?

Just like a tank unit, tankless water heaters need to be flushed once per year. Homeowners with hard water should consider flushing and cleaning the unit even more frequently, perhaps every six to nine months because of the excess amounts of magnesium and calcium found in hard water supplies.

What size water heater do I need for a family of 5?

For 1 to 2 people: 30-40 gallons. For 2 to 3 people: 40-50 gallons. For 3 to 4 people: 50-60 gallons. For 5 + people: 60-80 gallons.

Can I install a tankless water heater myself?

Installation. While it is possible to install your own tankless water heater, it’s not a job for inexperienced do -it-yourselfers. There are a number of different sizes and styles of tankless water heaters, including propane, natural gas and electric, along with single-room or whole-house sized models.

How hard is it to switch to a tankless water heater?

Tankless water heaters cost more than traditional tank water heaters; typically about twice the price for the unit alone, depending on what flow rate is needed. They’re also more difficult to install, as they have special venting requirements and often need larger gas lines because of the higher BTU rating.

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What is the most reliable tankless water heater?

Our Top Picks

  • BEST OVERALL: Rinnai RU160iN. The capabilities of the Rinnai RU160iN are impressive.
  • RUNNER UP: Rheem 240V Tankless Water Heater.
  • BEST ELECTRIC: Stiebel Eltron Tempra 36 Plus Tankless Water Heater.
  • BEST PORTABLE: Hike Crew Portable Propane Water Heater.
  • BEST POINT OF USE: ECOTOUCH Tankless Water Heater.

Do most new homes have tankless water heaters?

For several good reasons, nearly every new homebuilder in California is currently including tankless or on-demand hot water heaters in their construction. “On-demand hot water heaters use 30 to 40 percent less energy than traditional water heaters.”

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