Description
Hayward Universal H-Series Propane Pool Heater 400,000 BTU Low NOx W3H400FDP
Intro
Designed for performance-minded pool owners, the Hayward Universal H-Series Propane Gas Heater W3H400FDP delivers reliable warmth when you need it. With a 400,000 BTU input and a Low NOx footprint, it heats quickly while keeping emissions in check. The universal replacement design fits a wide range of existing systems, protecting your investment. An electronic ignition ensures fast starts, while a durable cabinet and corrosion-resistant heat exchanger withstand outdoor conditions. The intuitive digital interface makes temperature control effortless.
List of Features
- 400,000 BTU input ensures rapid heating and shorter wait times for warm water.
- Low NOx design minimizes environmental impact without compromising performance.
- Universal replacement design fits a wide range of pools, plumbing, and gas lines.
- Electronic ignition delivers reliable startup and avoids continuous pilot operation.
- Durable cabinet and corrosion-resistant heat exchanger withstand outdoor conditions.
- Intuitive digital controls enable precise temperature settings and quick status checks.
Final Thoughts
With powerful heating, efficient operation, and simple maintenance, this heater extends swim seasons and delivers consistent warmth. Ideal for larger residential pools and spa areas where quick recovery matters. Upgrade to Hayward H-Series propane heater for dependable warmth and lasting value.


















