Description
Hayward W3H400FDP Universal H-Series, Low NOx, 400,000 BTU, Propane Gas, Pool and Spa Heater delivering durability, reliability, and energy efficiency.
- “Totally Managed” Flow saving energy by reducing pump run time
- Silicon Nitride Ignition System
- Cupro-Nickel Heat Exchanger ensures compatibility with almost all pool systems including salt pools
- Low NOx certification
- 83-84% industry-leading thermal efficiency
- Patented header by-pass design
- Corrosion resistance
- Digital LED display
- High and low voltage options (110V or 220V)
- 3/4″ Gas Connection at heater
- Choice of left-side or right-side electric, gas and water connections (delivered right-side by default)
- 2″ or 2-1/2″ plumbing connections
- Important: Instructions for Accepting Your Freight Shipment
Installation Instructions:
- Verify compatibility between the pool heater and your existing pool equipment.
- Ensure the surface is level and stable, and has enough ventilation (especially for gas heaters).
- Match and attach the inlet and outlet pipes of your pool pump to the pool heater.
- May require a certified technician to meet safety regulations and codes.
- Please reference additional installation instructions in the owner’s manual located in the Guides and Documentation section below.
- Please Note: We recommend professional installation or the warranty may be void. See Warranty section below.
| Product Type: | Pool Heater |
| Heat Exchanger: | Cupro-Nickel |
| Controls: | Digital |
| Ignition: | Electronic |
| Emission: | Low NOx |
| Fuel Type: | Propane Gas |
| Installation Type: | Residential |
| Pool Type: | Spa/Hot Tub |
| Eco-Friendly: | Yes |
| Energy Efficient: | Yes |
| Pool Type: | In Ground |
| Voltage: | 110V / 220V |
| Heat Output: | 400,000 BTU |
| Elevation: | 0 – 2,000 ft |
| Manufacturer: | Hayward |
| Elevation: | 2,000 – 7,700 ft |
| Product Weight: | 210 lbs. |
| Product Dimensions: | 36.5″ Width x 29.5″ Length x 24″ Height |
| Warranty: | 1-Year |





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