Model # W3H150FDN
Warranty 1-Year Parts-Only Warranty
Hayward® Universal H-Series Low NOx Pool & Spa Heater – W3H150FDN
150,000 BTU | Natural Gas | Electronic Ignition | Cupro Nickel Heat Exchanger
The Hayward® Universal H-Series W3H150FDN is a high-performance, low NOx natural gas pool and spa heater engineered for efficiency, durability, and easy installation. With a Cupro Nickel heat exchanger and industry-leading hydraulic performance, this compact model is ideal for new and existing in-ground pool systems, even those with saltwater or aggressive water chemistry.
Key Features:
Cupro Nickel Heat Exchanger – Provides superior corrosion resistance in saltwater and high-flow environments
Low NOx Emissions – Meets strict air quality standards in California and Texas
Forced Draft Combustion System – Ensures consistent, weather-resistant performance without a high-wind stack
LED Digital Control Panel – Displays water temperature and diagnostic codes for easy troubleshooting
Polymer Header Design – Maximizes hydraulic efficiency and protects against erosion
Flexible Installation – Right or left-side gas, water, and electric connections; 2" x 2½" CPVC union fittings
Low Profile, Lightweight Design – Fits easily on tight or existing equipment pads
Applications:
In-ground pools and spas
Ideal for saltwater and aggressive water chemistry setups
Compliant with the California South Coast AQMD and Texas Natural Resource Commission Low NOx requirements
Specifications:
Model: W3H150FDN
BTU Output: 150,000
Fuel Type: Natural Gas
Ignition: Electronic
Union Size: 2" x 2.5" CPVC
Installation: Outdoor, in-ground pools/spas
Emissions: Low NOx Compliant
Warranty:
1-Year Limited Parts-Only Warranty
Overall Dimensions
How do you know if a pool heater is a propane heater or a natural gas heater?
Reply
Typically in the product name we use the abbreviation of "LP" for propane or "NG" for natural gas. Click here for a full listing of our >Pool Heaters.
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Will a gas heater operate at the low speed of a dual speed motor?
Reply
Probably not - Most gas heater will shut off at low GPM levels (20-40) to keep the heater cores from overheating - 20 for 200 BTUs, 40 for 400 BTUs. Depending on your pool system you might get these GPM levels at the low speed but generally these heaters must be run at the motor's high speed.
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What is the difference between an Electronic and Millivolt ignition?
Reply
The basic answer is that Millivolt is the old style of ignition, using a standing pilot light. While the electronic ignition uses a spark start system like a gas grill. Electronic ignitions are more efficient in gas usage and also are better suited for high wind areas where a pilot light might get extinguished.
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Is a vent required for typical outside installation for the Hayward 150k Ng Lo Nox heater?
Reply
For the Hayward Lo Nox heater, you would not need to purchase an additional vent if you are using it outside. If you are installing the heater outside, we recommend you purchasing a heater cover. This will protect your heater from debris, rain, snow, heat- or pretty much anything that could get caught in your heater. The Weather-Out Pool Heater Cover can be viewed on our website.
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$92.12
$3,199.00
$3,929.00
$2,179.00
