Rheem Tankless Water Heater, 199MBTUH, Includes Recirculation, Natural Gas or Liquid Propane, WIFI

Rheem RTGH-SR11i – 11.0 GPM Indoor High-Efficiency Condensing Tankless Water Heater with Recirculation Pump

The Rheem RTGH-SR11i is a high-efficiency, condensing tankless water heater designed for commercial-grade performance in residential or light-duty commercial applications. This model delivers a maximum flow rate of 11.0 gallons per minute at a 35°F rise and is equipped with an integrated recirculation pump to minimize hot water delivery times across the distribution system.

This unit operates on either natural gas or liquid propane and is intended for indoor wall-mounted installations. Featuring stainless steel condensing heat exchangers, commercial-grade components, and built-in WiFi for remote monitoring, the RTGH-SR11i provides a solution for applications requiring consistent hot water with reduced standby losses.

Product Highlights

• Condensing Technology: Dual stainless steel heat exchangers recover additional energy from exhaust gases, increasing system efficiency.
• Recirculation Pump: Built-in recirculation reduces wait times and supports dedicated return lines or crossover valve configurations (Smart-Circ™ ready).
• High Output: Rated for 11.0 GPM max at a 35°F temperature rise (6.3 GPM at 70°F rise), suitable for multi-point simultaneous demand.
• WiFi Integration: EcoNet® enabled for remote diagnostics, performance monitoring, and service alerts via connected devices.
• Space-Saving Design: Indoor model with wall-mountable form factor, suited for mechanical rooms or confined utility spaces.

Technical Specifications

• Model: RTGH-SR11i
• Flow Rate: 11.0 GPM (Max @ 35°F rise)
• Thermal Efficiency: Up to 94%
• Energy Factor (UEF): 0.93–0.94
• Fuel Type: Natural Gas or Liquid Propane
• BTU Input Range: 11,000–199,900 BTU/h
• Venting: 2" or 3" PVC, CPVC, or polypropylene; concentric and two-pipe options
• Dimensions: 18.5" W × 14" D × 26" H
• Weight: 59.5 lbs
• Water & Gas Connections: 3/4" NPT
• Max Operating Pressure: 150 psi
• WiFi Capability: Built-in (EcoNet App supported)

Installation Considerations

This unit is engineered for licensed mechanical or plumbing professionals. Proper gas supply sizing, combustion air intake, condensate drainage, and vent configuration must be verified per installation manual and local code. The integrated recirculation system requires appropriate pipe layout for either dedicated return lines or crossover valve configurations. Combustion settings are factory-calibrated but may require adjustment for LP conversion.

Application Notes

• Indoor Use Only: Certified for interior installations; outdoor models available separately.
• Commercial Light-Duty Use: Suitable for small commercial applications such as salons, offices, or hospitality suites when sized appropriately.
• Recirculation Modes: Supports timer-based, demand-initiated, or temperature-controlled recirculation with Smart-Circ™ technology.
• Service Access: Front-panel serviceability for heat exchanger inspection, filter access, and gas valve adjustments.

Certifications & Compliance

• CSA Certified for U.S. and Canada
• Energy Star® Qualified
• Meets or exceeds ANSI Z21.10.3 and CSA 4.3 standards
• Low NOx certified