Readers ask: What Size Tankless Gas Water Heater?

How many BTU do I need for tankless water heater?

If you currently have a gas tank water heater (natural gas or propane), you can install a gas tankless water heater. However, you will probably have to upsize the gas line coming from your meter to your heater, as tankless units typically require a dedicated line to service their high demands of up to 200,000 BTU.

Does size of tankless water heater matter?

Size matters when it comes to your tankless water heater. In fact, it is the most important part of choosing a new unit for your home. Having a water heater that is too small will result in it not being able to produce enough hot water for your household demand.

How many tankless heaters do I need?

For larger households that typically use more than 85 gallons per day, two tankless systems, or the largest available model, are likely needed. For smaller households that use under 40 gallons per day, one unit should suffice.

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What is the downside of a tankless water heater?

The primary disadvantage of on demand or instant hot water heaters is the upfront cost. The smaller units that you often see won’t produce enough hot water to serve most households. They’ll only serve one faucet at a time—a problem if you want to shower while the dishwasher is running.

Can a tankless water heater fill a tub?

Please remember that tankless water heaters also come in different sizes, and you need to get a unit that will deliver a strong flow to the tub. A small tankless water heater can take a long time to fill a large tub. Whatever way you choose, at least now you’ll finally be able to relax in a nice, hot whirlpool tub.

Can a tankless water heater work for the whole house?

A whole-house tankless water heater is built to provide continuous hot water whenever you need it. Both tank and tankless whole-house water heaters have their advantages. Tank-type water heaters have a lower upfront cost and are often easier to install when replacing a similar type tank water heater.

Is it worth switching to a tankless water heater?

The big advantage of tankless water heaters is that they use less energy since they only heat up water when you need it. You can save hundreds on your energy bill each year. Because they don’t waste power, you can also enjoy the fact that your home will be more sustainable and eco-friendly.

Why is tankless water heater installation so expensive?

Installation is expensive because the unit needs a bigger gas supply than a conventional water heater does, and it needs to run its own exhaust flue to the exterior. Installation costs can vary widely, depending on the location of the flue and the gas supply. The unit itself costs between $800 and $1,000.

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How do I know what size tankless water heater I 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.

What is the best tankless water heater brand?

Best tankless water heaters

  1. Best overall: Rinnai RUR160iN Water Heater. Courtesy of Amazon.
  2. Editor’s pick: Rinnai RU130iN. Courtesy of Amazon.
  3. Best for low prices: EcoSmart Eco 18 Electric Tankless Water Heater. Courtesy of Amazon.
  4. Best electric tankless water heater: Rheem RTEX-24.
  5. Best point-of-use heater: Bosch Tronic 3000.

Can you run two tankless water heaters?

It is possible to connect two tankless heaters to run parallel to each other, providing a larger amount of hot water on-demand. You could also get a larger tankless unit that can provide a higher flow rate.

Can you oversize a tankless water heater?

As suggested when selecting a tank-type heater, you don’t want to buy an oversized or undersized tankless water heater, as it will result in unnecessary issues such as the rising upfront price, operating costs and wasted water and energy – affecting your budget and time.

Can you have 2 tankless water heaters?

Installing two small tankless water heater units is typically more expensive than installing one large one, but it can ensure clients have hot water on demand for a variety of simultaneous uses. Most propane or natural gas tankless water heaters on the market can handle a rate of 5 gpm at a 70 degree temperature rise.

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