Raypak ASME Natural Gas Pool Heater, 399,000 BTU, Copper | 017378

Raypak B-R406A-EN-C #51 399,000 BTU Natural Gas Copper Heater

The Raypak B-R406A-EN-C #51 is a 399,000 BTU natural gas pool and spa heater designed for maximum heating performance at moderate elevations. Built for large residential and light commercial pools, this model delivers rapid heat-up and consistent temperature control.

Featuring a copper fin tube heat exchanger, this heater provides efficient thermal transfer while maintaining durability in properly balanced pool systems. Its Professional Series construction ensures long-term reliability in outdoor environments.

Maximum Heating Output with Reliable Elevation Performance

The #51 configuration is designed for elevations between approximately 2,000 and 5,999 feet, ensuring proper combustion and efficient operation. The digital control system allows for precise temperature adjustments, while the electronic ignition system ensures dependable startup.

The copper heat exchanger delivers strong heating performance and efficiency, making this unit ideal for high-demand pool applications.

Key Features

• 399,000 BTU heating capacity for large pools and spas
• #51 configuration for moderate elevation operation
• Natural gas powered heater
• Copper fin tube heat exchanger for efficient heat transfer
• Professional Series construction for long-term durability
• Digital control panel with microprocessor thermostat
• Electronic ignition system with no standing pilot
• Approximately 82% thermal efficiency
• Durable outdoor cabinet construction
• Ideal for high-demand pool systems

About the Raypak ASME Series

Raypak ASME Series pool heaters are engineered for commercial-grade performance and long-term reliability in high-demand pool and spa applications. Constructed in accordance with ASME standards, these heaters feature heavier-duty components and thicker heat exchangers designed to withstand continuous operation and higher system pressures. Available in both copper and cupronickel configurations, the ASME Series offers flexibility for standard and saltwater pool environments, with cupronickel models providing enhanced resistance to corrosion and chemical wear. The natural gas configuration delivers consistent, cost-effective heating, while Raypak’s proven atmospheric burner design ensures stable outdoor performance. With precise digital controls, electronic ignition, and fast heat-up capability, the ASME Series provides dependable, high-output heating for commercial and large residential pool systems across a range of elevations.