Hayward Universal H Series Propane Pool Heater 250,000 BTU Low NOx W3H250FDP 400W and Hi-Flo—it’s a dependable choice

and Hi-Flo—it’s a dependable choice for both pros and DIY pool owners

and maintenance-free upkeep

Construction highlights include:

Keep your pool’s circulation efficient with the Pentair 355270Z diffuser

Active 40/60

Hayward Universal H Series Propane Pool Heater 250,000 BTU Low NOx W3H250FDP 400W and Hi-Flo—it’s a dependable choiceHayward Universal H Series Propane Pool Heater 250,000 BTU Low NOx (W3H250FDP) The Hayward Universal H Series Propane Gas Heater W3H250FDP delivers rapid, reliable warmth for residential pools. Fueled by propane and rated at 250,000 BTU, it heats quickly while maintaining consistent water temperatures. Its universal design enables straightforward replacement in many existing systems, minimizing installation downtime and disruption to your swim season.