017707 | Raypak 337A Digital Low NOx ASME Pool Heater

Raypak 337A Digital Low NOx ASME Pool & Spa Heater

The Raypak 337A Digital Low NOx ASME Gas Pool & Spa Heater delivers reliable power for larger residential pools, spas, and commercial facilities that require dependable heating with long-term durability. With an input rate of 332 MBTU/h and 82% thermal efficiency, this model strikes the balance between high performance and energy-conscious operation. Built to ASME standards, it meets demanding commercial codes while offering the flexibility and ease of installation that pool professionals trust.

Engineered with Raypak’s signature durability, the 337A includes a galvanized metal cabinet, straight-tube copper or cupronickel heat exchanger, and bronze ASME headers that ensure extended life even under tough operating conditions. The integrated ProTek Shield module adds extra protection by absorbing corrosive elements common in saltwater and chlorinated pools, preserving the exchanger and reducing long-term maintenance costs.

Designed for convenience, the 337A features intelligent digital controls with a microprocessor-based thermostat, making temperature adjustments straightforward. The unit’s self-adjusting burner system ensures a clean, consistent burn regardless of gas pressure changes, while its low-profile design provides versatility for both indoor and outdoor installations. Built for performance and resilience, the 337A is a proven solution for pool and spa heating on a larger scale.

Key Features of the Raypak 337A ASME Low NOx Gas Heater

• Input Rate – 332 MBTU/h: Provides robust heating output designed for larger residential pools and spas, as well as light commercial installations.

• 82% Thermal Efficiency: Offers consistent heating performance with energy-conscious operation, helping lower long-term fuel expenses.

• ASME-Certified Design: Bronze headers and premium-grade components meet strict commercial safety and durability standards.

• Low NOx Certified: Equipped with a blower and gas valve system that maintains a clean, stable burn in compliance with environmental air-quality regulations.

• Copper or Cupronickel Exchanger Options: Straight-tube exchanger design reduces wear while supporting both standard and high-chloride pool water applications.

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

• Self-Adjusting Burner: Automatically balances combustion to account for gas pressure changes, ensuring safe and efficient performance.

• Digital Controls: Features a microprocessor thermostat and intuitive interface, with integration capability for remote automation systems.

• Durable Galvanized Cabinet: Built with a rugged weather-resistant housing designed to perform year-round in harsh outdoor conditions.

• Flexible Installation Layouts: Compact and low-profile design allows for both indoor and outdoor setups, making it adaptable to varied applications.

• 120/240VAC, 1-Phase Voltage: Works with standard electrical configurations, simplifying installation for contractors and service teams.

• Maximum Water Flow – 100 GPM: Maintains strong circulation to support larger volume systems without sacrificing heating consistency.