Rheem P-M406A-EN-C Digital Pool & Spa Heater – 399,000 BTU, Natural Gas

Rheem P-M406A-EN-C Digital Pool & Spa Heater – 399,000 BTU, Natural Gas

Efficient. Durable. Built to Perform.

The RHM-15-9965 / P-M406A-EN-C digital pool and spa heater is a high-capacity, 399,000 BTU natural gas heater engineered for top-tier performance and long-lasting reliability. Whether you're heating a residential pool, spa, or a commercial setup, this unit delivers fast, efficient, and consistent water temperatures—even in tough conditions.

Key Features:

• Digital LCD Control Panel: Intuitive display shows accurate temperature settings, operational status, and service diagnostics.

• Durable Powder-Coated Cabinet: Polyester-coated, galvanized steel resists corrosion and rust better than traditional metal finishes. A 7-stage wash and bake process ensures superior paint bonding.

• Advanced Heat Exchanger: All-copper fin-tube heat exchanger maximizes thermal efficiency. Optional cupro-nickel upgrade available for increased resistance in harsh water conditions.

• Unitherm Governor: Prevents condensation by regulating water temperature inside the heat exchanger, extending heater life.

• Wind-Resistant Design: Built for outdoor use with natural draft performance. Operates reliably even in windy or adverse weather without external fans.

• High Flow Rates: Integrated automatic bypass supports up to 125 GPM, ideal for larger systems or high-volume installations.

• Stainless Steel & Polymer Components: Non-ferrous waterway protects against rust and corrosion, ensuring clean operation and longevity.

• Flexible Installation: CPVC 2" slip-fit connections for fast setup. Compatible with both new and retrofit systems.

Specifications:

• Model: RHM-15-9965 / P-M406A-EN-C

• Input Capacity: 399,000 BTU/hr

• Fuel Type: Natural Gas

• Ignition System: IID (Intermittent Electronic Ignition)

• Heat Exchanger: Copper (Cupro-Nickel Optional)

• Elevation Range: 0 – 2,000 ft

• Application: Residential / Commercial Pools and Spas

• Emission: Standard

• Installation Type: Outdoor, In-Ground Pools

• Warranty: 2-Year Parts & Labor