Leading Tankless Technology
More homeowners and business owners choose Rinnai than any other tankless water heater brand. They choose Rinnai for their 100-year commitment to quality, for their industry-leading warranties, and because they're the first major tankless brand assembled in the U.S.A.
Condensing
Commercial Units
Non-Condensing
Smaller homes
The SENSEI® RX Series is the most advanced Condensing Tankless Water Heater on the market that sets the standard for efficiency at 0.98 UEF and delivers the ultimate in lifestyle comfort, smart design, and unlimited hot water.
Frequently Asked Questions
How Does a Tankless Works?
With a tankless water heater, your home's cold water is heated only when you need it, and it stays hot until you're done using it. This results in a limitless hot water supply and little to no wasted energy usage.
- Flame ignites and heats two heat exchangers
- Water preheats as it passes through the secondary heat exchanger
- Water continues to heat to desired temperature as it passes through stainless steel primary heat exchanger
- Water exits the unit and travels to the water fixture where it is needed
- Flame output adjusts as needed to maintain water temperature during use
- With usage complete, the flame turns off and water stops flowing
Condensing or Non-Condensing?
Condensing
The most advanced Condensing Tankless Water Heater on the market sets the standard for efficiency.
- Highest efficiency available up to a 0.98 UEF for RXP models.
- Industry first WiFi connection with smartphone via Bluetooth®.
- All-in-one easily install indoors or outdoors using natural gas or propane.
- Ideal for colder climates with lower groundwater temperatures
Non-Condensing
The FIRST and ONLY Non-Condensing Tankless Water Heater, REP Models, with a built-in pump.
- Lower initial cost, though you need a metal-based exhaust vent system
- Simpler maintenance
- No need to drain condensate if vented horizontally
- Ideal for warmer climates with higher groundwater temperatures
Are they energy Efficient?
Rated by a Uniform Energy Factor (UEF), tankless water heaters are a highly efficient hot water appliance and ENERGY STAR® certified units offer additional energy saving benefits.
Can I run Multiple appliance/fixtures at a time?
Because your water is continuously heated as needed, you’ll never have to choose between taking a hot shower, doing a load of laundry, or running the dishwasher.
What does recirculation mean?
If your home does not have a dedicated return line, Rinnai RXP tankless water heaters can offer faster hot water without adding an additional cold return line. This technology allows for the simple installation of a thermal bypass valve at the fixture farthest away from the water heater. Once installed, the unit temporarily uses the cold water line for recirculation.
