Raypak Digital® Low NOx ASME Natural Gas Heater – 399K BTU, Copper, Bronze Headers | B-R407A-EN-C (017708)

Product Overview

The Raypak Digital® Low NOx ASME Natural Gas Heater (B-R407A-EN-C, 017708) is a commercial-grade pool and spa heater engineered for high-capacity heating, reliability, and compliance with stringent safety and emissions standards. Delivering 399,000 BTU of heating power, this ASME-rated unit features copper construction with bronze headers for durability and corrosion resistance in demanding environments. The Low NOx combustion design helps reduce nitrogen oxide emissions, making it suitable for installations in areas with air quality requirements. With intuitive digital controls and dependable electronic ignition, this heater ensures efficient, user-friendly operation and long-lasting performance for large residential or commercial aquatic applications.

Ideal For

• Commercial pools or aquatic facilities requiring ASME-certified heaters

• Large residential pools needing 399,000 BTU of heat output

• Installations where natural gas is the preferred fuel

• Locations with Low NOx emissions requirements

• Service professionals specifying high-capacity commercial-grade heaters

Key Features

• 399,000 BTU Heating Capacity – High heat output for rapid and reliable warm-up of large pools

• ASME Certified Construction – Built to meet rigorous safety and pressure vessel standards

• Low NOx Combustion – Reduced emissions that help satisfy stricter air quality regulations

• Natural Gas Operation – Cost-effective and widely available fuel option

• Copper and Bronze Header Design – Durable materials that resist corrosion and extend service life

• Digital Control Interface – Intuitive setup and temperature management

• Electronic Ignition – Reliable starting performance without a standing pilot light

• Outdoor-Ready Build – Engineered to withstand weather and poolside conditions

• Standard Gas & Plumbing Connections – Simplifies installation and serviceability

Customer-Facing Q&A

Q: What does ASME certification mean?
A: ASME certification indicates that the heater meets strict construction and safety requirements for pressure vessels, making it suitable for commercial and high-pressure applications.

Q: Does this heater use natural gas?
A: Yes — this model is configured for natural gas operation.

Q: What does Low NOx mean?
A: Low NOx refers to reduced nitrogen oxide emissions, helping the heater meet environmental and air quality requirements.

Q: What materials are used in the heat exchange components?
A: The heater uses copper for heat transfer and bronze headers for enhanced corrosion resistance.

Q: Is professional installation recommended?
A: Yes — professional installation is strongly recommended to ensure safe gas connection, venting, and local code compliance.