40 Gal. Short Power Vent Water Heater, Residential, Gas, 36,000 BTU

Rheem Professional Classic Series 40-Gallon Power Vent Gas Water Heater

The Rheem PROG40S-36N-RH67-PV is a 40-gallon, natural gas-fired power vent water heater designed for residential applications where side-wall or vertical venting is required. It features a 36,000 BTU/hr input and is engineered for consistent thermal efficiency and reliable operation under varied demand loads. This unit is NAECA-compliant and integrates key performance and safety features aligned with current industry installation standards.

Key Performance Specifications

• Storage Capacity: 40 U.S. gallons nominal
• Input Rating: 36,000 BTU/hr (Natural Gas)
• Recovery Rate: Approximately 36.4 GPH at 90°F rise
• Energy Factor: 0.67 (UEF varies by region)
• Venting: 2" or 3" PVC/CPVC/ABS – up to 100 equivalent ft
• First Hour Rating: ~67 gallons (based on DOE test procedure)
• Warranty: 6-year tank and parts

Design & Installation Considerations

This model utilizes an induced draft blower system, eliminating the need for a vertical flue and allowing for flexible vent routing in tight mechanical spaces or homes without a standard chimney. The factory-installed pressure and temperature relief valve, side water connections, and powered anode rod provide both ease of installation and long-term corrosion resistance. A self-diagnostic control system enables rapid troubleshooting.

Installation must conform to local code and is best performed by a licensed professional. Electrical access is required for blower operation (standard 120V, 60Hz outlet). Proper condensate management is essential for power vent models.

Technical Highlights

• Self-diagnostic electronic gas control with LED status indicator
• Powered anode system for enhanced tank protection
• Low NOx burner meets South Coast Air Quality Management District (SCAQMD) Rule 1121
• Built-in FVIR (Flammable Vapor Ignition Resistant) safety system
• Brass drain valve and dielectric heat trap fittings pre-installed

Applications

Appropriate for residential new construction or replacement installations where horizontal or long-vent runs are required. Ideal for situations where traditional atmospheric venting is impractical or restricted by layout or code. Not recommended for commercial water heating applications due to capacity and recovery limitations.