Hayward W3H400FDP Universal H-Series Propane Gas 400,000 BTU Low NOx

Hayward W3H400FDP Universal H-Series Propane Gas Pool Heater – 400,000 BTU Low NOx

The Hayward Universal H-Series W3H400FDP is a high-capacity propane gas pool heater delivering 400,000 BTU of heating performance for larger residential pools and spa systems. Engineered for rapid heat-up and reliable operation, this heater allows pool owners to quickly reach desired water temperatures.

The heater incorporates a durable Cupro-Nickel heat exchanger and advanced hydraulic design to improve resistance to corrosion and erosion from high water flow rates. Its Low NOx emissions system helps meet strict environmental standards while maintaining strong heating performance. :contentReference[oaicite:1]{index=1}

Maximum Heating Power for Residential Pools

The Universal H-Series platform features fan-assisted combustion technology and digital electronic controls for precise temperature management. Its compact cabinet and universal plumbing unions allow simple integration with modern pool equipment systems.

Key Features

• 400,000 BTU propane gas heating capacity
• Universal H-Series Low NOx emissions heater
• Cupro-Nickel heat exchanger for corrosion protection
• Fan-assisted combustion system for consistent heating
• Electronic ignition with digital control interface
• Flexible plumbing and gas connections
• Designed for larger residential in-ground pools and spas
• Durable cabinet for outdoor equipment pad installations