Raypak 337A Digital Low NOx ASME Pool Heater | 017707

Raypak 337A Digital Low NOx ASME Pool & Spa Heater

The Raypak 337A Digital Low NOx ASME Gas Pool & Spa Heater is a high-capacity model built to handle larger pools, spas, and commercial installations with dependable performance. Delivering an input rate of 332 MBTU/h and operating at 82% efficiency, it provides the heating strength needed for bigger systems while maintaining energy-conscious operation. Its ASME certification ensures compliance with strict commercial safety and durability standards, making it suitable for both residential and light commercial use.

Constructed for lasting reliability, the 337A features a galvanized steel cabinet that resists outdoor wear, heavy-duty bronze ASME headers for strength, and a straight-tube heat exchanger available in copper or cupronickel. The straight-tube design reduces internal friction and increases durability, while Raypak’s ProTek Shield module adds a layer of defense against corrosion in both saltwater and chlorinated environments. Together, these features extend the heater’s service life and reduce the need for costly maintenance.

For ease of use, the heater is equipped with intelligent digital controls that provide precise temperature adjustments and seamless integration with remote pool automation systems. A self-adjusting burner stabilizes combustion even when gas pressure shifts, ensuring efficient, clean operation. Its compact, low-profile design makes it adaptable to indoor or outdoor installations. Built for performance, durability, and long-term reliability, the Raypak 337A is a proven solution for heating larger pools and spas.

Key Features of the Raypak 337A ASME Low NOx Heater

• Input Rate – 332 MBTU/h: Powerful heating capacity suited for large residential and commercial pool or spa systems, maintaining stable water temperatures.

• 82% Thermal Efficiency: Provides energy-conscious operation with reliable output, lowering operating costs over time.

• ASME-Certified Design: Bronze headers and durable construction ensure compliance with commercial codes and high reliability.

• Low NOx Certified: Equipped with a gas valve and blower that produce clean combustion, meeting strict emissions requirements.

• Copper or Cupronickel Exchanger Options: Straight-tube exchanger design minimizes wear and provides resilience in demanding pool conditions.

• ProTek Shield Module: An advanced protective insert absorbs corrosive elements, extending the lifespan of the exchanger in saltwater or chlorinated pools.

• Self-Adjusting Burner: Maintains consistent combustion by automatically compensating for changes in gas pressure.

• Digital Controls: Microprocessor thermostat and intuitive display offer simple operation and automation compatibility.

• Weather-Resistant Cabinet: Rugged galvanized metal housing with outdoor bezel delivers durability in harsh conditions.

• Flexible Installation: Low-profile, compact design supports indoor or outdoor placement depending on system requirements.

• 120/240VAC, 1-Phase Voltage: Compatible with standard power setups, simplifying installation for contractors and service teams.

• Maximum Water Flow – 100 GPM: Built to handle higher circulation rates, ensuring consistent heating for larger pools and spas.