50 Gal. Tall Water Heater, Residential, Gas, 40,000 BTU

Rheem Professional Classic Plus 50-Gallon Natural Gas Water Heater – Atmospheric Vent, 40,000 BTU

The Rheem PRO+G50-40N-RH62 is a tall-format, 50-gallon atmospheric vent water heater designed for residential applications requiring reliable performance, consistent recovery rates, and low-maintenance operation. It is equipped with a 40,000 BTU/hr low-NOx burner and offers a recovery rate of 40.4 gallons per hour at a 90°F temperature rise. This unit supports typical hot water demands in homes with 3–5 occupants.

This model is part of Rheem’s Professional Classic Plus series and includes enhanced features such as a silicon nitride hot surface ignition system, integrated diagnostics, and a combustion chamber with maintenance-free air intake. The tank is lined with Rheem's proprietary glass coating and protected by a premium-grade anode rod to resist corrosion and extend service life.

Technical Specifications

• Fuel Type: Natural Gas
• Tank Capacity: 50 gallons
• BTU Input: 40,000 BTU/hr
• Recovery Rate: 40.4 GPH @ 90°F rise
• Energy Factor: 0.62 (NAECA compliant)
• Venting: 3" or 4" B-vent (vertical atmospheric)
• Ignition: Push-button pilot with silicon nitride igniter
• Water Connections: 3/4" NPT, top-mounted
• Tank Protection: Fused glass lining with magnesium anode
• T&P Relief Valve: Factory-installed
• Warranty: 8-year limited on tank and parts
• Height: Approximately 60–61 inches
• Diameter: Approximately 22–23 inches

Installation and Application Notes

Designed for standard atmospheric installations, this unit is compatible with existing B-vent systems in retrofit or new residential construction. Installation requires no external power supply. Combustion air is drawn through an integrated, maintenance-free air intake system. All venting, combustion air, gas line sizing, and code compliance should be verified prior to installation.

Contractor Considerations

The PRO+G50-40N-RH62 is suitable for contractors seeking a mid-capacity gas-fired solution that minimizes service callbacks. Its self-diagnostic electronic gas valve provides operational feedback via LED indicators, facilitating faster commissioning and servicing. The extended 8-year warranty supports long-term performance expectations, with upgrade options available under Rheem’s ProtectionPlus™ program.