Raypak LoNOx ASME B-R337A-EN-C #26 332k BTU Natural Gas Copper Pool Heater

Raypak B-R337A-EN-C #26 332,000 BTU Natural Gas Copper Heater

The Raypak B-R337A-EN-C #26 is a 332,000 BTU natural gas pool and spa heater engineered for high-performance heating in low NOx compliant residential and commercial environments. Designed for medium to large pools, this model delivers fast heat-up and consistent temperature control using a copper fin tube heat exchanger.

As part of Raypak’s Professional Series, this heater features a rugged cabinet and upgraded internal components built for long-term durability in outdoor applications.

High Output Low NOx Heating with Professional Reliability

The #26 configuration is designed to meet low NOx emission requirements while maintaining efficient combustion and stable performance. The digital control system allows for precise temperature adjustment, while the electronic ignition system ensures reliable startup.

The copper heat exchanger provides excellent thermal efficiency and dependable heating performance for demanding pool systems.

Key Features

• 332,000 BTU heating capacity for medium to large pools and spas
• #26 low NOx configuration for emission compliance
• Natural gas powered heater
• Copper fin tube heat exchanger for efficient performance
• Professional Series construction for durability
• Digital control panel with microprocessor thermostat
• Electronic ignition system with no standing pilot
• Approximately 82% thermal efficiency
• Wind-resistant cabinet for outdoor installations
• Ideal for high-demand regulated pool systems

About the Raypak LoNox ASME Series

Raypak LoNox ASME pool heaters are engineered for commercial-grade performance while meeting strict low NOx emission requirements for environmentally regulated regions. Designed in accordance with ASME standards, these heaters feature heavy-duty construction and robust internal components built to handle continuous operation and higher pressure systems. Available with both copper and cupronickel heat exchangers, the LoNox ASME Series offers flexibility for standard and saltwater pool environments, with cupronickel providing enhanced resistance to corrosion and chemical wear. The natural gas configuration delivers efficient and consistent heating, while Raypak’s advanced low NOx burner system reduces emissions without sacrificing performance. With precise digital controls, electronic ignition, and dependable operation, the LoNox ASME Series is an ideal solution for commercial and large residential pool applications in regulated markets.