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

Raypak B-R337A-EN-X #26 332,000 BTU Natural Gas Cupronickel Heater

The Raypak B-R337A-EN-X #26 is a 332,000 BTU natural gas pool and spa heater designed for high-performance heating in low NOx compliant residential and commercial environments. Featuring a cupronickel fin tube heat exchanger, this model offers superior resistance to corrosion and chemical wear.

Built within Raypak’s Professional Series, this heater features a durable cabinet and heavy-duty internal components engineered for long-term outdoor operation. It is well suited for demanding applications requiring both performance and emission compliance.

High Output Low NOx Heating with Superior Durability

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

The cupronickel heat exchanger extends equipment life by protecting against corrosion and scale buildup in aggressive pool environments.

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
• Cupronickel heat exchanger for corrosion resistance
• 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 regulated and high-demand 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.