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Hayward Universal H Series Low NOx 150,000 BTU Natural Gas Swimming Pool Heater
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Hayward Universal H Series Low NOx 150,000 BTU Natural Gas Swimming Pool Heater

$2 799.00
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W3H150FDN previously H150FDN.

Product Name:
Hayward Universal H Series Low NOx 150,000 BTU Natural Gas Swimming Pool Heater
Product Code:
Maximum Altitude:
10,000 FT
BTU Rating:
150,000 BTUs
Heater Type:
Natural Gas
2 Inch Male Threaded
Voltage (if required):
120 / 240 V
Heater Dimensions:
33" x 33" x 30"
Replacement Parts
Shipping Dimensions:
33" x 33" x 26"
1 Year Parts / Labour

For Altitudes Up To 3,048 Meters (10,000 Feet)

Presenting Hayward®'s world-class heater with an Earth-friendly conscience; the Universal H-Series heater! While all Hayward H-Series heaters are energy-efficient, the Universal H-Series Low NOx heater has an 83-84 percent industry-leading thermal efficiency and complies with all current California and Texas air quality emission standards. The low NOx emission makes it a perfect choice for the environmentally concerned pool owner.

Enjoy a warmer pool this season without your fuel costs skyrocketing. Hayward's H-Series heaters represent innovative heating technology for pools and spas. Its hydraulic performance also saves energy by reducing the circulation time of the pump. It can raise the temperature of an 800 gallon pool 30 degrees in less than an hour and you'll feel the benefits the moment you step into the water. This approach to heating your pool is an efficient use of energy; showing once again our commitment to developing earth-friendly products.

Other performance and efficiency-enhancing advances include stainless steel burners, corrosion-resistant Finn Plate heat exchangers with Cupro nickel, and insulated Fire Tile combustion chambers. This traps the heat unlike other forms of insulation delivering the highest degree of performance from every BTU. Equipped with an LED control panel it monitors heater performance for added convenience and maximum comfort with minimum effort. The ignition system delivers dependable lighting and reliable operations with just a touch of a button. The forced draft system constantly moves air through the combustion chamber to eliminate all outside weather variables affecting heating performance, such as wind conditions, eliminating the need to install a high-wind stack.

Additionally, the Universal H-Series heater is easy to install and combines advanced technology with universal-fit flexibility making it virtually compatible with any new or existing equipment pad. This heating mixture sustains your swimming season, adds to your comfort, is energy efficient and reduces your fuel costs. This low NOx emissions heater is perfect for you and the environment—all at the same time.

WARNING: This heater will NOT work above 3,048 meters (10,000 feet)

Warranty Coverage: At the manufacturer's discretion. Limited warranty covers replacement parts and labour if the heater is installed with a pool or spa. The Applicable Warranty Period is one (1) year from the Purchase Date. The warranty does not cover damage caused by improper water chemistry. The warranty will be void if the heater is not installed by a licensed technician, or the heater has been installed on a soft sided pool. Please see product manual for specific warranty details.

Start a Warranty Claim:To begin a claim please email the model number, serial number, photo/video of the issue, and a detailed description of the issue the heater is experiencing to [email protected].


Works great!... very happy so far....

Written by steve p on April 13, 2020

Verified Review

Fantastic product! Costing approx. 25$ a month to heat 18x4 to 90 degrees F. day and night in Southern BC. Will be able to use our pool 6months of the year. Great customer service as well.

Written by Laura C on October 18, 2019

Verified Review

Awesome !!! worth every penny.. Temp at 90degrees F.

Written by Laura C on September 23, 2019

Verified Review

Heater works great, and a great company to deal with. When the heater I had initially ordered was back-ordered, they recommended this one and helped me out with the substitution for a modest price adjustment. The staff was knowledgeable and provided excellent advice! They shipped the same day, and the shipment arrived on time and in pristine condition. It was a bit of work to get the heat exchanger reversed to suit my installation, but I guess that's a luck of the draw thing. The instructions were clear, and with a bit of attention, there was really no issues getting it installed correctly. It seems appropriately sized for my 24 ft round above ground pool. Thanks for the excellent service and advice!

Written by Don on July 24, 2018

Verified Review

Bought it last year and it worked great. This year even better. Water in the pool was 2.7°C with a 12' X 50" hockey puck in it (May 19 good grief). Started pump and heater and 8 hours later, no ice and 8°C. 24 hours later the pool was ready to swim in at 27°C. Super easy to use, low maintenance and cost effective

Written by Dman on May 24, 2014

Verified Review

Great heater that works a treat..easy to install and operate..more compact than my old one..and I would thoroughly recommend it..

Written by Robert on April 15, 2014

Verified Review

Easy to operate and install. This heater works great!

Written by Thomas Scott on April 3, 2014

Verified Review

Pools not too huge but we're up there in altitude. Perfect heater for us. runs super

Written by AlexR on January 23, 2014

Verified Review

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Hayward Universal H Series Low NOx 150,000 BTU Natural Gas Swimming Pool Heater $2 799.00