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Hayward W3H400FDP Universal H-Series 400,000 BTU Propane Pool and Spa Heater for In-Ground Pools and Spas

3.9 3.9 out of 5 stars 194 ratings

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In The Swim Pool Supplies
Eligible for Return, Refund or Replacement within 30 days of receipt
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Eligible for Return, Refund or Replacement within 30 days of receipt
  • This item can be returned in its original condition for a full refund or replacement within 30 days of receipt. You may receive a partial or no refund on used, damaged or materially different returns.
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400,000 BTU (W3H400FDP)

Purchase options and add-ons

  • BEST FOR: In-ground pools and spas with a surface area up to 1,200 ft. where natural gas is available. Its low environmental impact makes it ideal for pools and spas located where low-NOx emissions are required.
  • PREMIUM PERFORMANCE: The Hayward Universal H-Series 400,000 BTU Propane Heater delivers premium heating performance for years of reliable, long-lasting comfort.
  • CORROSION PROTECTION: The Universal H-Series boasts exceptional protection against corrosion and premature failure caused by unbalanced water chemistry.
  • ENERGY SAVINGS: The efficient, industry-leading design reduces circulation pump run time to provide energy savings.
  • EASY-TO-USE: Intuitive front control panel provides easy operation, service and maintenance.

Customer ratings by feature

Easy to install
3.5 3.5
Value for money
3.2 3.2

Frequently bought together

$3,999.00
Get it Mar 25 - 28
In Stock
Ships from and sold by Spreetail.
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$29.55
Get it Mar 28 - Apr 2
In Stock
Ships from and sold by BackyardPoolSuperstore.
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Hayward W3H400FDP Universal H-Series 400,000 BTU Propane Pool and Spa Heater for In-Ground Pools and Spas
Hayward W3H400FDP Universal H-Series 400,000 BTU Propane Pool and Spa Heater for In-Ground Pools and Spas
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Price$3,999.00$2,195.95$1,749.95$2,297.95$639.00$2,499.00
Delivery
Get it Mar 25 - 28
Get it Mar 26 - 27
Get it Mar 25 - 26
Get it Mar 28 - Apr 5
Get it as soon as Wednesday, Mar 27
Get it Mar 25 - 28
Customer Ratings
Easy to install
3.5
4.5
4.5
4.4
4.1
4.1
Value for money
3.2
4.6
4.3
4.2
3.8
3.8
Tech Support
3.7
3.5
3.7
3.5
2.6
Energy efficiency
3.7
3.4
3.5
Sold By
Spreetail
FibroPool
FibroPool
FibroPool
ECOPOOLTECH
BackyardPoolSuperstore

Product information

Warranty & Support

Product Warranty: For warranty information about this product, please click here

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Hayward

Hayward W3H400FDP Universal H-Series 400,000 BTU Propane Pool and Spa Heater for In-Ground Pools and Spas


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Product Description

The Universal H-Series 400,000 BTU Propane Gas Pool & Spa Heater from Hayward provides reliable, long-lasting comfort for pools and spas with a surface area up to 1,200 ft. Built with a durable cupro nickel heat exchanger, it offers exceptional protection against corrosion and premature failure caused by unbalanced water chemistry, ensuring you get season after season of premium heating performance. The Universal H-Series boasts industry-leading hydraulic performance coupled with lightning-fast speed-to-heat capability— so you spend less time waiting, and more time swimming. Its low NOx emissions meet air quality standards in all low-NOx areas, so you can rest easy knowing its environmental impact is low, too.


From the manufacturer


About Hayward

For over 80-years, Hayward has been helping pool owners enjoy the pleasures of pool ownership by manufacturing cutting edge, technologically advanced pool equipment worldwide. Our goal is that at the end of the day, your only concern is to turn your equipment on and off.

Universal H-Series Propane Heaters

Right for so many reasons. Perfect for so many applications.

An efficiently heated pool or spa lets you control your swim season and provides luxurious comfort that fits your lifestyle. Universal H-Series heaters from Hayward offer hydraulically efficient solutions for any pool or spa. They also are environmentally responsible because of their low NOx emissions so you can enjoy efficient luxury and peace of mind - season after season.

Cupro Nickel State-of-the-art Finn Plate Heat Exchanger

Only Hayward constructs ALL heat exchangers of highly resilient Cupro Nickel for greater durability and longevity even in salt-based, high flow or aggressive water chemistry conditions.

Superior Hydraulic Performance and Reliability

Patented polymer header design provides superior hydraulic performance to save energy and protect against the damaging effects of erosion from high flow conditions to further improve reliability.

Forced Draft Combustion System

The Forced draft combustion system constantly moves air through the combustion chamber at a precise flow rate, eliminating all outside weather variables that can affect heating performance, such as high wind conditions.

L.E.D. Digital Control Panel

Intuitive and easy to read L.E.D. Control Panel provides digital temperature readout, diagnostics and electronic 'lock-out' of temperature set-point. Digital control accuracy saves time and money getting the pool to the perfect temperature.

W3H400FDP W3H350FDP W3H300FDP W3H250FDP W3H200FDP W3H150FDP
Customer Reviews
3.7 out of 5 stars
43
3.7 out of 5 stars
90
3.7 out of 5 stars
90
3.8 out of 5 stars
35
5.0 out of 5 stars
5
3.8 out of 5 stars
20
BTU/HR 400,000 350,000 300,000 250,000 200,000 150,000
Thermal Efficiency 83% 83% 82.7% 83% 83% 82.7%
Width 36" 33" 30" 28" 25" 21"
Indoor Vent Pipe Diameter 8" 8" 8" 6" 6" 6"
Heater Weight (LBS) 160 158 145 134 123 110
Gas Connection At Heater 3/4" 3/4" 3/4" 3/4" 3/4" 3/4"
Water Connections 2" x 2 1/2" 2" x 2 1/2" 2" x 2 1/2" 2" x 2 1/2" 2" x 2 1/2" 2" x 2 1/2"
Heat Exchanger Cupro Nickel Cupro Nickel Cupro Nickel Cupro Nickel Cupro Nickel Cupro Nickel

Customer reviews

3.9 out of 5 stars
3.9 out of 5
194 global ratings

Customers say

Customers like how easy it is to install the outdoor living product. They say the plumbing is pretty straight forward. However, some customers have reported issues with leakage. Opinions are mixed on quality.

AI-generated from the text of customer reviews

9 customers mention9 positive0 negative

Customers find the installation process of the outdoor living product to be easy and straightforward. They mention that the plumbing was pretty straight forward.

"No worries. Easy to install and works as promised." Read more

"...Plumbing it in was pretty straight forward...." Read more

"Price was the beast I could find on the internet. It was not too hard to install, but I had help from a friend, that is a licensed plumber, and my..." Read more

"Product was received and installed by me. Simple enough; two water connects, a single gas connection, and single power connection...." Read more

28 customers mention19 positive9 negative

Customers are mixed about the quality of the hot tub heater. Some mention that it works great and is easy to install, while others say that it's not a great product and stopped working after one season.

"No worries. Easy to install and works as promised." Read more

"...When it fires up, it has a low rumble, and the water is very noticeably hot. It only kicks on a couple of times a day...." Read more

"...Obviously this is a known quality issue. He also stated the blower was affecting thr control electronics and display through the ground...." Read more

"...Great product and the family was enjoying the pool the next day." Read more

3 customers mention0 positive3 negative

Customers are dissatisfied with the leakage of the outdoor living product. They mention that it leaks continuously and water pours out from inside the heater.

"I installed this pool heater and in less than 2 months it started leaking...." Read more

"...However, about 10 months in, I came out to find water pouring out from inside the heater...." Read more

"...Product defective upon installation it leaked continuously...." Read more

3 customers mention0 positive3 negative

Customers are dissatisfied with the pressure of the outdoor living product. They mention that the tank freezes over and loses pressure. They also say that there is insufficient pressure from the blower and that the problem was low water pressure.

"...I finally watched a video and it explained that the problem was LOW WATER PRESSURE...." Read more

"...The unit would not get through it's start check, insufficient pressure from the blower. Call to Hayward tech/customer support was worthless...." Read more

"...that the tank freezes over and looses pressure because the liquid propane is to cold to turn to a gas...." Read more

DO NOT BUY THIS POOL HEATER THEY DON'T TELL YOU THEY NOR HAYWARD WON'T WARRANTY IT.
1 Star
DO NOT BUY THIS POOL HEATER THEY DON'T TELL YOU THEY NOR HAYWARD WON'T WARRANTY IT.
I installed this pool heater and in less than 2 months it started leaking. I found the return tubes defective and contacted Doheny's, who said they do not warranty Hayward pool heaters. I contacted Hayward who stated they do not warranty pool heaters installed be homeowners. I am left with a defective pool heater that HAS NO WARRANTY! Doheny's passed the buck to Hayward and Hayward passed back to Doheny's. Meanwhile I here I sit with a $2000.00 defective pool heater. Doheny's do not tell you that there is no warranty on the product THEY sell when you buy it. DO NOT BUY A HAYWARD POOL HEATER FROM DOHENY'S SPEND THE EXTRA MONEY AND BUY FROM A AUTHORIZED COMPANY AND HAVE THEM INSTALL AND WARRANTY IT WHEN YOUR HAYWARD POOL HEATER GOES BAD AND IT WILL!!!!
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Top reviews from the United States

Reviewed in the United States on February 2, 2024
Size: 150,000 BTU (W3H150FDP)Verified Purchase
Reviewed in the United States on July 21, 2020
Size: 150,000 BTU (W3H150FDP)Verified Purchase
53 people found this helpful
Report
Reviewed in the United States on September 23, 2021
Size: 150,000 BTU (W3H150FDP)Verified Purchase
Customer image
1.0 out of 5 stars DO NOT BUY THIS POOL HEATER THEY DON'T TELL YOU THEY NOR HAYWARD WON'T WARRANTY IT.
Reviewed in the United States on September 23, 2021
I installed this pool heater and in less than 2 months it started leaking. I found the return tubes defective and contacted Doheny's, who said they do not warranty Hayward pool heaters. I contacted Hayward who stated they do not warranty pool heaters installed be homeowners. I am left with a defective pool heater that HAS NO WARRANTY! Doheny's passed the buck to Hayward and Hayward passed back to Doheny's. Meanwhile I here I sit with a $2000.00 defective pool heater. Doheny's do not tell you that there is no warranty on the product THEY sell when you buy it. DO NOT BUY A HAYWARD POOL HEATER FROM DOHENY'S SPEND THE EXTRA MONEY AND BUY FROM A AUTHORIZED COMPANY AND HAVE THEM INSTALL AND WARRANTY IT WHEN YOUR HAYWARD POOL HEATER GOES BAD AND IT WILL!!!!
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Customer imageCustomer image
12 people found this helpful
Report
Reviewed in the United States on June 21, 2020
Size: 250,000 BTU (W3H250FDP)Verified Purchase
12 people found this helpful
Report
Reviewed in the United States on February 10, 2024
Size: 400,000 BTU (W3H400FDP)Verified Purchase
2 people found this helpful
Report
Reviewed in the United States on May 26, 2021
Size: 150,000 BTU (W3H150FDP)Verified Purchase
14 people found this helpful
Report
Reviewed in the United States on November 12, 2021
Size: 250,000 BTU (W3H250FDP)Verified Purchase
2 people found this helpful
Report
Reviewed in the United States on July 27, 2023
Size: 250,000 BTU (W3H250FDP)Verified Purchase