Hayward | W3H135FDP | Universal H-Series 135K BTU Propane Pool Heater, Low NOx
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The Hayward W3H135FDP is a Universal H-Series liquid propane pool and spa heater rated at 135,000 BTU. It is the compact end of the H-Series line, sized for above-ground pools and spas, and built with a cupro-nickel heat exchanger and Low NOx combustion.
Features
- 135,000 BTU heating capacity for above-ground pools and spas
- Cupro-nickel heat exchanger resists corrosion in salt and hard water
- Low NOx design meets air quality requirements in regulated regions
- Digital LED control panel for precise temperature setting
- Polymer header and bypass valve improve hydraulic efficiency and cut pump run time
- 120/240V, 60 Hz, single phase electrical
- Runs on liquid propane where natural gas service is unavailable
Specifications
- Brand: Hayward
- Manufacturer part number: W3H135FDP
- Heating capacity: 135,000 BTU
- Fuel: Liquid propane
- Heat exchanger: Cupro-nickel
- Electrical: 120/240V, 60 Hz, single phase
- Series: Universal H-Series
Frequently Asked Questions
What size pool does a 135,000 BTU heater suit?
It is the smallest H-Series output and fits above-ground pools and spas. Sizing depends on surface area, the temperature rise you want, and your climate, so have a pool professional size it for your install.
What is the difference between the W3H and W3HS series?
The W3HS models add built-in OmniX connectivity for app based control and diagnostics. The W3H models are the same Universal H-Series platform without it, controlled from the onboard panel or an external Hayward automation system.
Can this run on natural gas?
No. Gas type is set by model. This is the liquid propane version. Order W3H135FDN if you have natural gas service.
Why does the cupro-nickel heat exchanger matter?
Cupro-nickel resists corrosion better than standard copper, which matters on saltwater pools, hard water, and installs where chemistry swings.
What electrical supply does it need?
120/240V, 60 Hz, single phase. Confirm your pad wiring before ordering.
Can I install it myself?
Propane heater installation involves gas piping, venting, and electrical work, and most jurisdictions require a licensed installer. Improper installation can also affect warranty coverage.
Sold by AppaeTech Pool Supply, an authorized Hayward reseller.