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Raypak 407A Digital Low NOx ASME Pool Heater | 017708
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Raypak 407A Digital Low NOx ASME Pool & Spa Heater
The Raypak 407A Digital Low NOx ASME Gas Pool & Spa Heater stands as the most powerful unit in Raypak’s Low NOx ASME lineup, designed for large pools, spas, and commercial environments where maximum heating capacity is required. With an input rate of 399 MBTU/h and 82% thermal efficiency, this heater ensures fast, dependable performance while managing energy usage effectively. Certified to ASME standards, it meets the highest levels of commercial safety and durability.
Built for strength, the 407A features a galvanized metal cabinet that resists corrosion, along with bronze ASME headers for added structural integrity. A straight-tube heat exchanger, available in copper or cupronickel, eliminates unnecessary bends to reduce wear and improve durability. Raypak’s ProTek Shield module adds an extra layer of protection, absorbing corrosive elements in saltwater and chlorinated pools to extend exchanger lifespan and lower maintenance costs.
User-friendly operation is supported by digital microprocessor controls, offering precise temperature management and compatibility with remote automation systems. The self-adjusting burner automatically stabilizes combustion when gas pressure shifts, while Low NOx certification ensures compliance with strict environmental regulations in states such as California, Texas, and Utah. Combining robust construction, intelligent features, and exceptional output, the Raypak 407A is engineered for long-term performance in large-scale pool heating applications.
Key Features of the Raypak 407A ASME Low NOx Heater
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Input Rate – 399 MBTU/h: Powerful heating designed for high-volume systems, including large pools, spas, and commercial installations.
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82% Thermal Efficiency: Provides efficient operation with dependable heating output while helping reduce long-term energy costs.
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ASME-Certified Construction: Built with bronze headers and durable materials to meet strict commercial safety and code requirements.
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Low NOx Certified: Blower and gas valve system ensure precise combustion control, meeting demanding air-quality regulations.
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Copper or Cupronickel Heat Exchanger: Straight-tube design reduces internal wear and extends performance life in heavy-duty use.
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ProTek Shield Module: Specialized protective insert helps safeguard the exchanger against corrosive pool water elements.
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Self-Adjusting Burner: Maintains safe, efficient combustion by compensating automatically for pressure fluctuations.
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Digital Controls: Equipped with a microprocessor thermostat and intuitive interface, plus automation compatibility.
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Weather-Resistant Cabinet: Galvanized steel enclosure protects the heater against corrosion and outdoor exposure.
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Flexible Indoor/Outdoor Setup: Compact profile makes installation possible in both indoor and outdoor system layouts.
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120/240VAC, 1-Phase Voltage: Supports standard electrical configurations for simplified installation.
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Maximum Water Flow – 100 GPM: Built to handle high circulation systems, delivering reliable heating across large water volumes.

Digital Low NOx ASME 207A Specifications
- Model: 407A
- Input Rate: 399 MBTU/h
- Thermal Efficiency: 82%
- Indoor & Outdoor: ASME
- Energy Type: Gas
- Venting: Category I
- Voltage: 120/240VAC
- Phase: 1-Phase
- Max Water Flow: 100 GPM