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Residential Gas Tank & Tankless Water Heaters
The complete Reliance line of natural gas and liquid propane water heaters consists of over 150 different models. From high-efficiency ENERGY STAR® certified water heaters to economical standard efficiency gas water heaters, Reliance has the gas water heater to fit your needs
Residential Gas Tankless Water Heaters
In 2010, Reliance Water Heaters introduced its full line of natural gas and propane tankless water heaters that continue to be an innovative part of the full Reliance product family today. Engineered to deliver continuous hot water when you need it, propane and natural gas tankless water heaters are easily installed in tight spaces, including closets, bathrooms and even outdoors in appropriate climates.
Condensing Gas Tankless Water Heaters with X3®
Our Gas Tankless Water Heaters with X3® Scale Prevention Technology require no scale related maintenance, and offer three times longer life compared to standard tankless.
Rebates & Tax Credits
What Our Customers Are Saying
- 15-year warranty on heat exchanger; 5-year limited warranty on parts for residential applications
- Ultra-Low NOx Emissions
- Primary heat exchanger is constructed of commercial-grade copper
“Endless hot water supply has made our entire family happy!�?
Benefits of Gas Tankless Water Heaters
Continuous Hot Water
Gas tankless water heaters give you continuous hot water on demand. When paired with a recirculation pump, they provide guaranteed instant hot water.
Space Savings
Reliance’s natural gas and propane tankless water heaters can be mounted inside or outside (depending on your region) to save space within your home.
Energy Savings
Gas tankless water heaters only heat your water when you need it, which can reduce energy costs. Paired with Reliance’s 15-year tankless limited warranty, gas tankless models can be a smart, money-saving solution for your home.
How it Works
When a natural gas tankless water heater or propane tankless water heater is installed in your home, it is attached directly to the water line to deliver on-demand hot water. When you open a hot water tap, the water flow sensor within your water heater is triggered and the burner is activated. The water within your system begins to circulate through the heat exchanger, heating your water to the designated temperature and providing you with continuous hot water. Once you turn off your water tap, the unit shuts down to save energy.
Water Heater Selector Quiz
Find A Retail Store Location
Reliance water heaters are sold at numerous retail store locations find the one closest to you.
Still Have Questions?
Reliance tankless water heaters boast industry-leading 15 year limited warranties. While the lifespan of a gas tankless water heater can vary, factors like water conditions, usage rates and maintenance all contribute to your water heater’s health. New condensing units come equipped with X3® Scale Reduction Technology that extends life up to three times longer.
- What do I need?
- Before installation, you will need to determine the incoming ground water temperature, the ideal location in your home, and the correct water heater size required for your needs.
- Where to install?
- A tankless water heater can be installed anywhere in your home with the correct piping—closets, garage, bathrooms, etc. In warmer climates where there is no risk of freezing, a tankless water heater may be installed on the exterior of the home to save on interior space.
Product Comparison
*Many factors affect the actual performance of a water heater. This represents our closest approximation of your likely experience with this water heater in your local area, but actual performance may vary depending on factors beyond our ability to control or estimate.
*Gas water heaters with UEF of 0.82 or higher OR with a thermal efficiency of at least 90%. Local utility rebates available in limited geographical areas. For information on the Federal Tax Credit, go to: energystar.gov. Check with your tax advisor for applicability. Offer details and expiration may vary. See Rebate Center for details.
Featured Gas Tankless Water Heaters
- ENERGY STAR® certified with a UEF of 0.95
- 15-year warranty on heat exchanger
- Add X3® Scale Prevention with bypass cartridge to maintain like-new performance (sold separately)
- ENERGY STAR® certified with a UEF of 0.95
- 15-year warranty on heat exchanger
- X3® Scale Prevention Technology—Maintains like-new performance longer
Looking for a Store Near You?
Reliance is sold at numerous retail locations throughout the U.S.
High-Efficiency Condensing Gas Tankless Water Heaters
Learn more about Reliance’s full line of high-efficiency condensing gas tankless water heaters.
Non-Condensing Gas Tankless Water Heaters
Learn more about Reliance’s full line of non-condensing gas tankless water heaters.
Not sure which water heater is right for you?
Find Your Neighborhood Retail Store Location
For more than 40 years, Reliance Water Heaters has been committed to delivering dependable water heaters. Order from a trusted retailer near you.