Raypak 017707 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 is engineered for large residential pools, spas, and commercial systems that require powerful heating paired with reliable durability. With an input rate of 332 MBTU/h and 82% thermal efficiency, this model is designed to deliver strong performance while keeping long-term energy consumption under control. Certified to meet ASME commercial standards, it provides the level of quality and compliance pool professionals depend on.

Durability is central to the 337A’s construction. The heater is housed in a galvanized metal cabinet that protects against harsh outdoor conditions, while heavy-duty bronze ASME headers ensure strength in demanding installations. A copper or cupronickel straight-tube heat exchanger reduces internal stress by eliminating unnecessary bends, improving overall reliability. Raypak’s ProTek Shield module further enhances longevity by absorbing corrosive elements, protecting the exchanger in both saltwater and chlorinated pool environments.

Ease of operation is ensured with digital microprocessor controls that allow precise temperature management and smooth integration into automated systems. A self-adjusting burner compensates for fluctuations in gas pressure to maintain a clean, efficient burn, while the low-profile design supports both indoor and outdoor installations. With its balance of strength, performance, and efficiency, the Raypak 337A is built to serve larger pools and spas with consistent reliability.

Key Features of the Raypak 337A ASME Low NOx Heater

• Input Rate – 332 MBTU/h: Provides ample heating capacity for larger pools, spas, and light commercial systems, ensuring dependable temperature control.

• 82% Thermal Efficiency: Maintains strong heating performance while helping to reduce ongoing operating costs over time.

• ASME-Certified Build: Bronze headers and high-grade components ensure compliance with commercial codes and provide reliable durability.

• Low NOx Certified: Designed with a blower and gas valve system that optimizes combustion, meeting environmental air-quality regulations.

• Copper or Cupronickel Heat Exchanger: Straight-tube exchanger design improves durability and supports both chlorinated and saltwater systems.

• ProTek Shield Module: Protects the heat exchanger by absorbing corrosive elements, extending the heater’s service life under harsh conditions.

• Self-Adjusting Burner: Adapts automatically to gas pressure changes, maintaining steady, safe, and efficient performance.

• Digital Control System: Microprocessor thermostat with a user-friendly interface, fully compatible with remote pool automation.

• Durable Galvanized Cabinet: Rugged exterior provides resistance to weather and corrosion, ensuring dependable operation year-round.

• Flexible Indoor/Outdoor Installation: Compact profile supports a variety of placement options across different system setups.

• 120/240VAC, 1-Phase Voltage: Designed to work with standard electrical setups for straightforward installation.

• Maximum Water Flow – 100 GPM: Handles high circulation rates to support larger pool and spa systems with consistent heating.