How many gallons per minute are two showers?

By Robert Flores / October 27, 2022

It is recommended that you use 1.0 GPM for bathroom water needs. If you are running two different showers at the same time, you will need at least 5 gallons of water from your tankless water heater. If you need to run both your washing machine and shower at the same time, you will use around 4.5 gallons per minute.

How many bathrooms can a tankless water heater handle?

SELECTING A TANKLESS WATER HEATER For a home with 1 bathroom, we recommend 6-7 GPM; 2 bathrooms, 8 – 9 GPM; and 3+ bathrooms, 9-11 GPM. In our experience, smaller 4-5 GPM units are suitable for studio apartments and small one bathroom homes or other application specific needs.

Can a tankless water heater work for the whole house?

Both gas and electric water tankless heaters can function as whole-house solutions or as a smaller “point-of-use” system. Smaller single-use tankless water heaters heat water for just a single room, tap, or appliance. These larger and smaller systems essentially work in the same way.

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What is the most common problems with tankless water heaters?

Here are six of the most common problems and maintenance concerns for tankless water heaters: Mineral Buildup. System Overload. Cold Water Sandwich. Air Supply or Exhaust Blockage. Ignition Failure. Flame Failure. Mar 9, 2022

Can you claim a tankless water heater on your taxes?

If a tankless water heater has a UEF rating of . 82 and above, it qualifies for a rebate no matter the brand. And if you purchase any tankless water heater, you can get $300 back on your taxes. Oct 25, 2021

Do tankless water heaters require 220?

Requirements for electric tankless water heaters: Voltage — Many retailers sell units that will accommodate 110V, 120V, 208V, 220V, 240V, and 277V.

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? 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 3 more rows

Which brand of tankless water heaters is best?

The 10 Best Tankless Water Heaters of 2022. EcoSmart ECO 27. Rheem 18kw Tankless Electric Water Heater. Stiebel Eltron DHC Trend Point-of-Use Electric Tankless Water Heaters. Rheem 13kw Tankless Electric Water Heater RTEX-13. Eemax 27kW Electric Tankless. Rinnai RU160iN RU Model Series. More items… • Oct 17, 2022

How long does it take to install a tankless water?

Afterward, the tankless unit must also be mounted and connected. Tankless to Tankless Installation: This generally takes between one to three hours.

Is gas or electric better for tankless water heater?

Overall, natural gas tankless water heaters are the choice for greater water heating capacity and electric models are better for small households and bolstering existing systems.

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Do tankless water heaters need a vent?

Tankless hot water heaters require special venting to blow hot exhaust gas outside, where it dissipates. Unlike traditional tank-style water heaters, gas tankless hot water heaters offer far more versatile venting options. Oct 15, 2012

Can you put a tankless water heater anywhere?

Tankless water heaters can be installed anywhere inside your home. You can even have a tankless water heater in a bathroom! Some families with larger homes choose to install two, one for each floor, for example. Because of their small size, they fit in closets, cabinets, pantries or laundry rooms. Oct 29, 2020

Does tankless water heater need to be mounted outside wall?

While tankless water heaters are meant to save you space over tank-style water heaters, there are still some challenges of installing them. They need to be installed inside of your home’s walls and then vented outside. Jan 6, 2022

Do tankless water heaters go inside or outside?

An indoor tankless water heater is installed inside your home. An outdoor unit is installed outside the home and is designed to withstand the elements. If you live in a climate where temperatures drop below freezing, you must always be sure to take precautions to avoid freeze damage, such as draining the unit. Mar 9, 2022

Can I install an electric tankless water heater myself?

As a homeowner you are usually allowed to install a water heater yourself. However, in most states you must still pull a permit to have it inspected for safety. This also goes for replacing an old water heater. Sept 27, 2022

Does cold weather affect tankless water heater?

If the water is colder, the tankless water heater can’t provide as much hot water per minute because it takes longer to heat it. Just like it would take you longer to cook frozen food than refrigerated food. Dec 21, 2021

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Why does it take so long to get hot water from my tankless water heater?

The length of the delay can be determined by a few factors, including the distance between the water heater and the outlet. In other words, the longer the water has to travel, the more cold water will need to be discharged before the hot water appears. Dec 21, 2020

What is the pros and cons of a tankless water heater?

Pros and cons of on-demand hot water Pros of tankless water heaters Cons of tankless water heaters High efficiency Limited flow rate Long-term savings High upfront cost Environmentally friendly Can require prior setup work Jan 21, 2020

Why should I switch to a tankless water heater?

The most well-known benefits of tankless water heaters are higher energy-efficient and lower energy bills, but these units also offer a longer service life, endless hot water, easier maintenance, lower risk of water damage, and more. Dec 20, 2020

What size gas line do I need for a tankless water heater?

¾-inch A typical tankless water heater will need a ¾-inch gas line. However, if there is sufficient pressure and the run length is short enough, a ½-inch line may be sufficient with certain tankless water heaters, such as the Noritz EZ Series. Nov 8, 2018

Resources

How To Size A Tankless Water Heater

Tankless Water Heater Buyer’s Guide


https://www.protoolreviews.com/how-do-tankless-water-heaters-work/
https://www.eccotemp.com/blog/6-common-tankless-water-heater-problems-and-how-to-solve-them/index.php
https://www.monkeywrenchplumbers.com/learning-center/2022-tankless-water-heater-rebates

Tankless Water Heater Buying Guide

What Size Tankless Water Heater Do I Need? (2,3,4,5,6 Family)


https://www.forbes.com/home-improvement/plumbing/best-tankless-water-heaters/
https://www.homedepot.com/c/ah/what-to-expect-during-water-heater-installation-appointment/9ba683603be9fa5395fab9042d83092
https://bfplumbingbayarea.com/blog/gas-vs-electric-tankless-water-heaters/
https://www.rinnai.us/announcements/7-tips-tankless-water-heater-venting

Can I Install a Tankless Water Heater in a Bathroom

Can a Tankless Water Heater be Installed Outside?


https://www.eccotemp.com/blog/tankless-water-heaters-indoor-vs-outdoor/index.php

How to Install an Electric Tankless Water Heater + Installation Requirements

Does a Tankless Water Heater Work Well in Cold Climates?

How to Deal with a Delay in Hot Water from a Tankless Water Heaters


https://www.energysage.com/clean-heating-cooling/tankless-hot-water/tankless-hot-water-pros-and-cons/

7 Great Reasons to Switch to a Tankless Water Heater

Tankless Water Heater Installation Tips. Things to Consider

About the author

Robert Flores