Skip to product information
1 of 3


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

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

Regular price $3,999.00
Regular price $4,399.00 Sale price $3,999.00
Sale Sold out
Shipping calculated at checkout.

The Hayward Universal H-Series Propane Gas 400,000 BTU Low NOx Pool Heater, often identified as the W3H400FDP, is a high-performance and energy-efficient heating system designed to warm your swimming pool or spa water efficiently. Here's a detailed description of this product:

Powerful Heating Capacity: The Hayward Universal H-Series Pool Heater boasts an impressive 400,000 BTU (British Thermal Units) heating capacity, making it capable of rapidly and effectively heating your pool water, even in larger pools or spas.

Propane Gas-Powered: This pool heater is designed to operate on propane gas, which is a popular and efficient fuel source for heating pool water. Propane is clean-burning and offers a rapid response for quick heating.

Low NOx Emissions: One of the standout features of the W3H400FDP is its low NOx (nitrogen oxide) emissions. It's built to meet strict air quality standards, reducing the environmental impact while ensuring safe and clean operation.

Versatile Installation: The Hayward Universal H-Series Heater is versatile and suitable for both in-ground and above-ground pools. It offers flexibility in terms of installation, making it compatible with various plumbing setups.

Digital Control Panel: The pool heater typically comes equipped with a user-friendly digital control panel, allowing you to set and adjust the desired water temperature and operating settings with ease. The digital display provides clear and precise information about the heater's operation.

Cupro-Nickel Heat Exchanger: The heat exchanger inside this heater is constructed from durable cupro-nickel material. This enhances its resistance to corrosion, ensuring a longer lifespan and consistent performance.

Energy-Efficient Operation: Hayward is known for designing energy-efficient pool heaters, and the Universal H-Series is no exception. It is built to maximize heat transfer while minimizing energy consumption, helping you save on heating costs.

Reliable and Durable: Hayward pool heaters are renowned for their durability and reliability. The W3H400FDP is constructed to withstand exposure to pool chemicals, weather conditions, and continuous operation.

Safety Features: This pool heater typically includes safety features such as a high-limit switch, pressure switch, and diagnostic LED indicators, which enhance the safety and monitoring of the heating process.

The Hayward Universal H-Series Propane Gas 400,000 BTU Low NOx Pool Heater (W3H400FDP) is a powerful and eco-friendly solution for maintaining your pool or spa at the desired temperature. Its low NOx emissions, energy efficiency, and durable construction make it a top choice for pool owners seeking optimal heating performance with a reduced environmental footprint. Whether you have an in-ground or above-ground pool, this heater is designed to provide consistent warmth and extend your pool's usability throughout the year.



Product Depth (in.) 29.5 in Product Height (in.) 24 in
Product Width (in.) 34 in


BTU Rating 399900 Controls Digital
Features No Additional Features Fuel Type Propane Gas
Heat Exchanger Cupro-Nickel Ignition Type Electrical
Outdoor Living Product Type Pool Heaters Pool Gallons (approx) 40000
Pool Type Above Ground, In Ground Product Weight (lb.) 205 lb
Returnable 90-Day

    Why Choose Aqua Terra?

    At Aqua Terra, we take immense pride in offering the finest selection of patio and pool products crafted with the highest quality materials, ensuring durability and long-lasting enjoyment for our valued customers. Discover the difference of being part of Aqua Terra and elevate your patio and pool experiences to new levels of satisfaction. Choose Aqua Terra today and elevate your patio and pool experiences to new horizons!

    View full details