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HAYWARD UNIVERSAL H-SERIES H500FDNASME 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: Low-Lead Bronze
Certification: ASME
Water Flow Rate: 40-125 GPM
Maximum Pressure: 125 PSI
The Hayward H500FDNASME Universal H-Series ASME Low NOx Natural Gas Pool & Spa Heater delivers 500,000 BTU - the largest output Hayward builds in this platform, and the standard specification for commercial pools and any installation where code requires an ASME-certified vessel.
ASME certification is the practical difference. The unit ships with an ASME pressure relief valve as standard and is rated to 125 PSI. It pairs a patented Cupro-Nickel Finn Plate heat exchanger with a low-lead bronze header using Hayward's patented bypass design - the 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. The 24-inch cabinet height is the lowest in the industry for this output, and a forced-draft combustion system removes the need for a high-wind stack.
Key Features
- 500,000 BTU heating capacity
- Natural Gas
- ASME certified with pressure relief valve standard
- Rated to 125 PSI maximum pressure
- Patented Cupro-Nickel Finn Plate heat exchanger with totally managed flow
- Low-lead bronze header with patented bypass design
- 40-125 GPM water flow rate
- Approximately 21.9 F delta-T at minimum flow
- 24" cabinet height - lowest in the industry
- Low NOx design
- Forced-draft combustion system
- 2" x 2-1/2" CPVC flanged plumbing connections
- 3-year parts and labor warranty
Specifications
| Specification | Details |
| Brand | Hayward |
| Part Number | H500FDNASME |
| Series | Universal H-Series ASME |
| Fuel Type | Natural Gas |
| BTU Input | 500,000 BTU |
| Heat Exchanger | Cupro-Nickel Finn Plate |
| Header Material | Low-Lead Bronze |
| Certification | ASME |
| Maximum Pressure | 125 PSI |
| Water Flow Rate | 40-125 GPM |
| Delta-T | Approx. 21.9 F at Minimum Flow |
| Plumbing Connections | 2" x 2-1/2" CPVC Flanged |
| Gas Connection | 3/4" NPT |
| 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 |
| Warranty | 3-Year Parts & Labor |
What's Included
- Hayward H500FDNASME Universal H-Series ASME Low NOx Natural Gas Pool & Spa Heater
- Cupro-Nickel Finn Plate heat exchanger with low-lead bronze header
- ASME pressure relief valve
- 2" x 2-1/2" CPVC flanged plumbing connections
- Installation and operation documentation
The Hayward H500FDNASME delivers 500,000 BTU of ASME-certified natural gas heating with a cupro-nickel exchanger and bronze header - built 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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