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Residential Gas Tankless Water Heaters
The complete State Water Heaters 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, State Water Heaters has the gas water heater to fit your needs
Residential Gas Tankless Water Heaters
In 2010, State Water Heaters introduced its comprehensive range of natural gas and propane tankless water heaters, which remain an integral part of the full State Water Heaters product lineup today. Engineered to provide continuous hot water on demand, propane and natural gas tankless water heaters offer easy installation in tight spaces, such as closets, and even outdoors in suitable 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.
Federal Tax Credits & Local Utility Rebates
Get up to $600 in Federal Tax Credits, plus local utility rebates may be in your area when you upgrade to a gas tankless water heater!
*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.
What Our Customers Are Saying
- ENERGY STAR® certified with a UEF of 0.95
- 199,000 BTU input
- 15-year limited warranty
“I love not having to worry about running out of hot water."
- Endless Hot Water
- 199,000 BTU input
- 15-year limited warranty
“Endless hot water supply has made our entire family happy!"
Benefits of Gas Tankless Water Heaters
Continuous Hot Water
Gas tankless water heaters offer continuous hot water on demand, ensuring you have hot water whenever you need it. When combined with a recirculation pump, they provide instant hot water, further enhancing convenience and comfort in your home.
Space Savings
State Water Heaters natural gas and propane tankless water heaters offer the flexibility to be mounted either inside or outside, depending on your region's requirements. This versatility helps save valuable space within your home while providing efficient hot water delivery.
Energy Savings
Gas tankless water heaters only heat water as needed, resulting in potential energy savings. When combined with State Water Heaters 15-year tankless limited warranty, gas tankless models offer a smart and cost-effective 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 connects directly to the water line to provide hot water on demand. When you turn on a hot water tap, the water flow sensor within the water heater detects the flow and activates the burner. The water in the system circulates through the heat exchanger, heating it to the desired temperature and delivering a continuous supply of hot water. Once you turn off the tap, the unit shuts down automatically to conserve energy.
Still Have Questions?
A gas tankless water heater is more efficient than a conventional tank water heater, as it doesn't require energy to keep a reservoir of water heated around the clock. Water flows to a heat exchanger that immediately heats the water using hot exhaust gasses. According to the U.S. Department of Energy, a tankless water heater is up to 34% more energy efficient than a tank water heater for homes using less than 41 gallons of water per day and up to 14% more efficient for homes using 86 gallons of water daily. It's also more compact than a tank water heater, saving space.
A tankless water heater offers significant energy savings because it only heats water when you turn on an appliance or hot water tap. It heats water as soon it passes through the heat exchanger, quickly providing a continuous supply of hot water. Installation of tankless water heaters can oftentimes be more expensive because of the reconfiguration of gas piping, etc. However, not only do our tankless models have 15 year limited warranties, our newest condensing models come equipped with X3® Scale Reduction Technology that prevents scale buildup, eliminates the need for regular scale-related maintenance, and extends life up to three times longer.
State’s 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 can come equipped with X3® Scale Reduction Technology that extends life up to three times longer.
Tankless water heaters have different flow rates measured in gallons per minute (GPM), which indicate the amount of water they can deliver at a time. Because these water heaters don't maintain a supply of hot water in a tank, you need to choose an appropriately sized tankless model based on household needs. The ideal output rate for your home depends on the number of people in the residence, the appliances you use, and the original temperature of the water being heated. Some people install more than one tankless water heater based on their requirements.
- 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.
Find A Local Water Heater Pro
State Water Heaters are professionally installed by local independent contractors.
Featured Gas Tankless Water Heaters
- ENERGY STAR® certified with a UEF of 0.95
- 199,000 BTU input
- 15-year limited warranty
- ENERGY STAR® certified with a UEF of 0.95
- 180,000 BTU input
- 15-year limited warranty
- ENERGY STAR® certified with a UEF of 0.95
- 160,000 BTU input
- 15-year limited warranty
High-Efficiency Condensing Gas Tankless Water Heaters
Learn about State Water Heater's full line of high-efficiency condensing gas tankless water heaters.
Non-Condensing Gas Tankless Water Heaters
Learn about State Water Heater’s full line of non-condensing gas tankless water heaters.
Not sure which product is right for you?
Take our water heater selector quiz to find the correct water heater for your home.
Interested in Learning More?
*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.