Smart Replacement
Built with superior quality and reliability, Rinnai's tankless rack systems offer the perfect BTU upgrade for older domestic boiler units that require reheating storage tanks. On retro-fit applications, you can keep your existing tank and pump, and simply replace the system with the lower cost and better-performing TRS.
Built for Businesses
The condensing CU199 tankless water heater, which comes standard, boasts 97% thermal efficiency and a heat exchanger designed for the demands of commercial applications.
Rely on Built-in Redundancy
By banking individual tankless water heaters, free-standing racks ensure your business’s hot water supply is uninterrupted — even if a unit is down.
Flexible Installation
Enjoy the flexibility to choose the unit that works best for your business. Rinnai tankless water heaters are available with natural gas or propane fuel options, can be installed inside or outside, and have various venting options, including PVC and the Rinnai common vent system.
Application Engineering Center of Excellence
Our team of application engineers is available to provide quotes, size your system and provide designs for your specific project — all at no charge and backed by our 100% system sizing guarantee.