Rinnai has been a trusted name in water heaters since Founded 1920, based in Japan. As part of Rinnai Corporation (Japan), Rinnai benefits from extensive R&D and manufacturing resources. The brand is particularly known for The #1 tankless water heater brand in North America with Sensei condensing technology, ThermaCirc360 recirculation, and over 100 years of Japanese engineering. Rinnai is positioned in the premium price tier, making it a premium investment for water heaters.
Rinnai Water Heaters
by Rinnai Corporation (Japan)Rinnai manufactures condensing and non-condensing tankless water heaters, condensing boilers, and hybrid tank-tankless systems. The Sensei RU series delivers up to 0.96 UEF with ThermaCirc360 built-in recirculation for instant hot water. The RSC condensing boiler and RE hybrid tank-tankless provide additional options. Wi-Fi module enables remote monitoring via the Rinnai app. Commercial models support cascading for high-demand applications.
PremiumTop-tier materials, design, and warranty
Rinnai Water Heaters Product Lines
Sensei RU Condensing TanklessRL Non-Condensing TanklessRSC Condensing BoilerRE Hybrid Tank-TanklessCommercial Demand Duo
Why Choose Rinnai for Water Heaters?
Rinnai stands out in the water heaters market because of The #1 tankless water heater brand in North America with Sensei condensing technology, ThermaCirc360 recirculation, and over 100 years of Japanese engineering. Their products carry 4 industry certifications, including Energy Star, UL Listed, CSA Certified, giving homeowners confidence in quality and compliance. Rinnai backs their water heaters with a 12-year residential heat exchanger warranty; 5-year parts, which shows commitment to long-term reliability. With 5 dedicated product lines — Sensei RU Condensing Tankless, RL Non-Condensing Tankless, RSC Condensing Boiler, RE Hybrid Tank-Tankless, and more — there's a Rinnai option for virtually every need and budget.
Certifications & Standards
Energy StarUL ListedCSA CertifiedAHRI Certified
Warranty & Support
Warranty12-year residential heat exchanger warranty; 5-year parts
Phone Support1-800-621-9419
Official Websitehttps://www.rinnai.us
Where to Buy Rinnai Water Heaters
Water Heaters How-To Guides
View All →How to Adjust Water Temperature
Set your gas or electric water heater thermostat to the right temperature for comfort, safety, and lower energy bills -- plus how to verify the actual output with a thermometer.
How to Choose the Right Size Water Heater
Calculate the right water heater size so you never run out of hot water -- covers first-hour rating for tanks, GPM for tankless, quick sizing charts, and the mistakes that leave people taking cold showers.
How to Flush Your Water Heater
Flush sediment from your tank water heater to cut energy bills, eliminate rumbling noises, and add years to its life -- the most important maintenance task most homeowners skip.
Common Water Heaters Problems
View All →Leaking Water Heater
Water around the base demands immediate attention -- floor damage, mold, electrical hazards. Could be loose fittings, a failing T&P valve, a bad drain valve, or a rusted-through tank that needs replacement.
No Hot Water
No hot water from any fixture? Cause depends on gas vs. electric. Common culprits: pilot light out, tripped breaker, failed element, faulty thermostat or gas valve.
Pilot Light Won't Stay Lit
Lights but will not stay lit? Almost always the thermocouple -- a safety sensor that detects the pilot flame. When it fails, the gas valve shuts off. Straightforward DIY repair, under $25.
Water Heaters Types
View All →Water Heaters Buying Guides
View All →Rinnai Water Heaters FAQ
Is Rinnai a good brand for water heaters?
Rinnai Corporation is a Japanese manufacturer of tankless water heaters, boilers, and gas appliances, with US headquarters in Peachtree City, Georgia. Founded in 1920 in Nagoya, Japan, Rinnai is one of the world's largest gas appliance manufacturers and the #1 selling tankless water heater brand in North America. Their Sensei and RU series condensing tankless units feature ThermaCirc360 built-in recirculation and Wi-Fi module connectivity for smart home integration.
What warranty does Rinnai offer on water heaters?
Rinnai offers 12-year residential heat exchanger warranty; 5-year parts.
Where is Rinnai made?
Rinnai is based in Japan, headquartered in Peachtree City, Georgia (US HQ); Nagoya, Japan (Global HQ).
What price range does Rinnai water heaters fall into?
Rinnai is positioned in the premium price tier for water heaters. You pay more but get superior quality, materials, and warranty coverage.
What water heaters product lines does Rinnai offer?
Rinnai offers 5 water heaters product lines: Sensei RU Condensing Tankless, RL Non-Condensing Tankless, RSC Condensing Boiler, RE Hybrid Tank-Tankless, Commercial Demand Duo.
What certifications does Rinnai have for water heaters?
Rinnai holds 4 certifications including Energy Star, UL Listed, CSA Certified.