Hayward H-Series Gas Pool Heaters – Available in All Sizes

The Hayward H-Series Pool Heater is a proven, industry-leading gas heater known for fast heat-up times, durability, and dependable performance for both above-ground and in-ground pools and spas. Available in a full range of BTU sizes, the H-Series allows pool owners to select the right heater capacity for efficient temperature control throughout the swimming season.

Built with a cupro-nickel heat exchanger, the Hayward H-Series offers superior resistance to corrosion and chemical wear compared to standard copper exchangers. This makes it a reliable option for a wide range of pool environments, including saltwater pools when properly maintained. The fan-assisted combustion system delivers consistent heat output, even during cooler weather.

Digital electronic controls provide accurate temperature adjustment, while the compact cabinet design allows for easier servicing and flexible installation options. Whether you’re replacing an older heater or installing a new system, the H-Series continues to be a popular choice for pool professionals and homeowners alike.

Key Features & Benefits

• Available in Multiple BTU Sizes to match pool and spa heating needs

• Cupro-Nickel Heat Exchanger for improved durability and longer service life

• Fan-Assisted Combustion for fast, reliable heating performance

• Digital Electronic Thermostat for precise temperature control

• Natural Gas or Propane Models Available (model dependent)

• Compact, Service-Friendly Design simplifies installation and maintenance

• Compatible with Standard Pool Plumbing Systems

PTL Direct Pro Tip: Selecting the correct BTU size improves efficiency, shortens heat-up time, and helps extend heater lifespan—especially for early spring and late-season use.

Hayward H-Series Pool Heater Sizing Chart

Use this chart as a general guideline when selecting the correct Hayward H-Series heater size. Actual heating needs may vary based on climate, wind exposure, shade, and use of a solar cover.

Recommended Heater Size by Pool Volume & Dimensions

Pool Size (Gallons)	Pool Type	Recommended Heater Size	Approximate Pool Size Examples
Up to 10,000 gal	Above Ground / Small Inground	100,000 – 135,000 BTU	12' Round AG • 10' x 20'
10,000 – 15,000 gal	Above Ground / Inground	135,000 – 150,000 BTU	15' Round AG • 12' x 24'
15,000 – 20,000 gal	Inground	150,000 – 200,000 BTU	14' x 28' • 16' x 32'
20,000 – 25,000 gal	Inground	200,000 – 250,000 BTU	16' x 32' • 18' x 36'
25,000 – 30,000 gal	Inground	250,000 – 300,000 BTU	18' x 36' • 20' x 40'
30,000 – 40,000 gal	Large Inground	300,000 – 400,000 BTU	20' x 40' • 18' x 44'
40,000+ gal	Large / Commercial	400,000 BTU	25' x 45'+ • Custom Pools