The Hayward Universal H-Series 250K BTU Natural Gas Heater (H250FDN) delivers dependable, high-capacity warmth for residential pools while standing up to the elements. Designed to extend your swim season with precise temperature control, this gas pool heater combines robust construction with intuitive operation for years of hassle-free comfort.

Why this Hayward H-Series stands out

• 250,000 BTU heating capacity provides strong, reliable performance for medium-to-large residential pools, delivering faster warmth when you need it most.
• Natural gas operation uses a common, efficient fuel source that’s widely available where natural gas lines exist, helping you heat more water with steady cost efficiency.
• Reliable ignition ensures quick, dependable starts so you don’t wait when you’re ready to swim.
• Corrosion-resistant cabinet and weather-ready construction are built to endure outdoor poolside environments, resisting the elements and saltwater exposure.
• User-friendly controls enable straightforward temperature setting and monitoring, making pool temperature management simple for homeowners and pros alike.
• Standard gas and plumbing connections streamline installation and serviceability, reducing downtime and simplifying routine maintenance.

Designed for real-world pool owners

Ideal for residential setups where natural gas is available, the H250FDN is purpose-built to keep your pool comfortably warm through cooler seasons. Its sturdy construction, combined with intuitive controls, makes it accessible for homeowners while still meeting the reliability demands that service professionals expect. Whether you’re cooling off on a summer evening or planning an extended pool season, this heater delivers consistent water temperature control with minimal fuss.

Who should consider the Hayward H-Series H250FDN

• Residential pool owners seeking a dependable, gas-powered heater with robust outdoor durability.
• Pools requiring up to 250,000 BTU of heat output for efficient warm-up cycles.
• Properties with natural gas supply looking for an efficient heat source with straightforward operation.
• Professionals specifying a proven gas heater that combines ease of installation with long service life.

Practical use cases and benefits

Use your H250FDN to:

• Extend swimming seasons in shoulder months when outdoor temperatures drop.
• Maintain comfortable pool temperatures for night swims or family gatherings without waiting for the sun to warm the water.
• Provide consistent heat across mid-sized residential pools with a single, reliable unit.
• Balance performance and ease of maintenance in outdoor pool equipment rooms or equipment pads.

Installation and maintenance tips

• Professional installation is strongly recommended to ensure proper gas connections, venting, and compliance with local codes.
• Regularly inspect the cabinet for debris and ensure clear airflow around the unit to preserve efficiency and longevity.
• Schedule routine maintenance to verify ignition reliability, gas pressure, and electrical connections for safe, dependable operation.

Common questions

• Q: What fuel does this heater use?

  A: This model operates on natural gas.

• Q: How much heat power does this provide?

  A: It produces 250,000 BTUs, suitable for medium to larger residential pools.

• Q: Can I adjust the water temperature easily?

  A: Yes — the intuitive controls allow for simple temperature setting and monitoring.

• Q: Is this heater suitable for outdoor installation?

  A: Yes. The corrosion-resistant design and weather-ready construction make it ideal for outdoor poolside environments.

• Q: Should professional installation be used?

  A: Yes — professional installation is strongly recommended to ensure proper gas connection, venting, and local code compliance.