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HAYWARD UNIVERSAL H-SERIES ASME LOW NOX NATURAL GAS POOL & SPA HEATER – 500K BTU, BRONZE HEADERS, CUPRO-NICKEL HEAT EXCHANGER
Dimensions: 24" H x 40" W x 29.5" D
Heating Capacity: 500,000 BTU
Fuel Type: Natural Gas
Heat Exchanger: Cupro-Nickel Finn Plate
Header Material: Bronze
Certification: ASME
Water Flow Rate: 40-125 GPM
Emissions: Low NOx
The Hayward HS500FDNASME Universal H-Series ASME Natural Gas Pool & Spa Heater delivers 500,000 BTU - the largest output in the Universal H-Series range and a common specification for commercial pools, large residential installations, and any application where local code requires an ASME-certified vessel.
ASME certification is the practical difference here. The unit ships with an ASME pressure relief valve as standard and pairs a patented Cupro-Nickel Finn Plate heat exchanger with a bronze header, a combination specified for commercial duty cycles and aggressive water chemistry.
At 40 to 125 GPM the heater produces roughly a 21.9 F delta-T at minimum required flow. A forced-draft combustion system removes the need for a high-wind stack, and the cabinet installs indoors or outdoors with 12" side and 6" rear clearances.
Key Features
- 500,000 BTU heating capacity
- Natural Gas
- ASME certified with ASME pressure relief valve standard
- Patented Cupro-Nickel Finn Plate heat exchanger
- Bronze header for commercial-duty corrosion resistance
- 40-125 GPM water flow rate
- Approximately 21.9 F delta-T at minimum flow
- Low NOx design
- Forced-draft combustion system
- 2" x 2-1/2" CPVC flanged plumbing connections
- Low ambient operation down to 40 F
- 3-year parts and labor warranty
Specifications
| Specification | Details |
| Brand | Hayward |
| Part Number | HS500FDNASME |
| Model | H500FDNASME |
| Series | Universal H-Series ASME |
| Fuel Type | Natural Gas |
| BTU Input | 500,000 BTU |
| Heat Exchanger | Cupro-Nickel Finn Plate |
| Header Material | Bronze |
| Certification | ASME |
| Water Flow Rate | 40-125 GPM |
| Delta-T | Approx. 21.9 F at Minimum Flow |
| Plumbing Connections | 2" x 2-1/2" CPVC Flanged |
| Dimensions | 24" H x 40" W x 29.5" D |
| Unit Weight | 260 lbs |
| Voltage | 120/240V |
| Phase | Single Phase |
| Frequency | 60 Hz |
| Circuit Amps | 5.5 A |
| Maximum Breaker Size | 15 A |
| Emissions | Low NOx |
| Clearances | 12" Sides / 6" Rear |
| Minimum Operating Temperature | 40 F |
| Warranty | 3-Year Parts & Labor |
What's Included
- Hayward HS500FDNASME Universal H-Series ASME Natural Gas Pool & Spa Heater
- Cupro-Nickel Finn Plate heat exchanger with bronze header
- ASME pressure relief valve
- 2" x 2-1/2" CPVC flanged plumbing connections
- Installation and operation documentation
The Hayward HS500FDNASME brings 500,000 BTU of ASME-certified natural gas heating with a cupro-nickel exchanger and bronze header - the right specification for commercial pools and code-driven installations.
Learn more at Hayward:
https://hayward.com/universal-h-series-asme-500-000-btu-natural-gas-low-nox-h500fdnasme.html
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