Raypak Digital P-R406A-EN-X #51 399k BTU Natural Gas Cupronickel Pool Heater

Raypak P-R406A-EN-X #51 399,000 BTU Natural Gas Cupronickel Heater

The Raypak P-R406A-EN-X #51 is a 399,000 BTU natural gas pool and spa heater designed for maximum heating output at elevations between 2,000 and 5,999 feet. Ideal for large residential pools and spas, this model delivers fast heat-up times and consistent temperature performance.

Equipped with a cupronickel fin tube heat exchanger, this heater provides superior resistance to corrosion and chemical wear, making it well suited for saltwater pools and demanding environments.

Maximum Output Heating with Reliable Digital Control

The #51 configuration ensures proper combustion at higher elevations, maintaining efficiency and consistent operation. The digital control panel allows for precise temperature adjustment, while the electronic ignition system provides dependable startup.

The cupronickel heat exchanger protects against corrosion and erosion, helping extend the lifespan of the heater and reduce maintenance requirements.

Key Features

• 399,000 BTU heating capacity for large pools and spas
• #51 configuration for 2,000 to 5,999 ft elevation
• Natural gas powered for high-output heating
• Cupronickel heat exchanger for enhanced durability
• Digital control panel with precise temperature adjustment
• Electronic ignition system with no standing pilot
• Approximately 82% thermal efficiency
• Supports up to 100 GPM water flow
• Category I venting compatibility
• Ideal for saltwater and high-demand pool systems

About the Raypak Digital Cupronickel Series

Raypak Digital Cupronickel pool heaters are designed for reliable, high-performance heating in residential and light commercial pool applications where added durability is required. Built with a cupronickel fin tube heat exchanger, these heaters offer enhanced resistance to corrosion and chemical wear, making them ideal for saltwater and aggressively treated pool systems. The natural gas configuration provides consistent and cost-effective heating, while Raypak’s proven atmospheric burner design ensures stable outdoor operation. Available in multiple elevation configurations, the Digital Series maintains proper combustion and performance at varying altitudes. With a microprocessor-controlled thermostat, electronic ignition, and fast heat-up capability, Raypak Digital Cupronickel heaters deliver precise temperature control and long-term dependable performance.