Hayward W3H200FDN Universal H-Series, Low NOx, 200,000 BTU, Natural Gas, Pool and Spa Heater
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Availability:
In Stock.
Arrives
Mar 12 – Mar 17
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Size: 200,000 BTU (W3H200FDN)
Features
- "Totally Managed" Flow saving energy by reducing pump run time
- Silicon Nitride Ignition System
- Cupro-Nickel Heat Exchanger ensures compatibility with almost all pool systems including salt pools
- Low NOx certification
- 83-84% industry-leading thermal efficiency
Description
The Universal H-Series 200,000 BTU Natural Gas Pool & Spa Heater from Hayward provides reliable, long-lasting comfort for pools and spas with a surface area of up to 600 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.
Product Dimensions: 33.3 x 32.8 x 30.6 inches
Item Weight: 161 pounds
Manufacturer: Hayward
Item model number: W3H200FDN
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Mar 12 – Mar 17
This item is non-returnable:
Non-returnable. Transportation of this item is subject to hazardous materials regulation
View our full returns policy here.
Non-returnable. Transportation of this item is subject to hazardous materials regulation
View our full returns policy here.
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Top Amazon Reviews
Size: 400,000 BTU (W3H400FDN)
Easy to install. Not cheap, but efficient heater for my large pool. It has been 2yrs, and aside from the mice that ate the wiring harness to the display, it was worked great (display was easy to replace and parts are easily accessible which is also nice to make sure this lasts for a long time to come. I think the wires may have been soy based insulation which may be part of the problem). Otherwise it fit where my prior unit was as I just replaced the 20+ year old unit. Not the quietest of devices, but as this is my first pool/hot tub...not sure if they get quieter.
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Reviewed in the United States on September 5, 2025 by Rob
Size: 250,000 BTU (W3H250FDN)
We recently installed this heater to go with our Core 35 which is $1,400.00 itself to convert to a pool salt system. Usually our pool is cloudy but since going to salt it’s cleared up considerably. We decided to install a heater after talking about doing so for years now as the pool is almost always cloudy during the summer and Generally we can only swim May - September due to the water getting to chili in October- April. We are hoping with this heater to extend our swimming season to 11 months out of the year. It took roughly 4 days to install it So it was a little hard to hook up we had to run gas lines literally all over the side of our house and through our attic and underground to get to our heater as you can see from the pictures. We tested it out the first night and overnight it warmed our pool from 65* to 80*F, Def can feel the warm water coming out of the jets. Looking forward to trying this out more in October and November when temperatures really drop down but so far I’m pleased with it. Spent roughly $1,200.00 in labor to get the work done and another $800 in parts, like gas line pipes, fittings plumbing and valves… thankfully lowes was able to cut and put the fittings on our gas lines for us but I would say this is a minimum $4,500.00 project undertaking perhaps a bit more if using a pool company, professional plumber or if you live in a big city. We got the 250,000 btu heater and our pool is roughly 22,500 gallons which maybe overkill but wanted to go to big rather than to small on a nice heater…Just wanted to throw that out there for anyone considering getting one installed. That price includes the cost of the unit. The unit really isn’t loud. Update we have had it a little over a week now and we love it! We are in the pool almost daily now. I generally keep the heater on 78* degrees and when I get off work and home around 530pm I’ll cracked it up to 104* and by 7:30pm it’s over 94*! Talking about nice and relaxing I could literally sit in the pool as if it were a hot tub! Updated after a month we are in October now and still like the heater. Gas bill was about $60 more than it normally is for this time of the year and we generally keep the heater on 82F in the pool. One issue we have had is the heater will show the code LO every now and then and will go into a protection mode and will not work until you backwash and let the pressure out
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Reviewed in the United States on September 16, 2022 by wkmgator wkmgator
Size: 400,000 BTU (W3H400FDN)
I bought this in Jan 2024. I FINALLY installed it a few weeks ago as one of the last things to do as part of a huge renovation project. Had to run a new gas line etc. it starts right up. No worries. Then I get a HF error. Follow the manual and reset. Nope. Did my research. It’s either a bad board, or a bad gas valve. Their online help is effectively useless, especially if you are on your phone. I’ll call Hayward today. I’ll update this as soon as I get this resolved.
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Reviewed in the United States on April 25, 2025 by Eric R. Roberts
Size: 400,000 BTU (W3H400FDN)
So I purchased nearly identical model 17 years ago. Self installed except for need of larger supply line for gas input that required a licensed plumber. While I did have a couple failures related to the odd geckos crawling up behind a circuit board with 220 voltage (part easily obtained from Amazon and replaced myself) and shorting out. The heater performed wonderfully! Fast forward to this spring and it was not working after winter months. No input from control board. Tested things I was sure of to no avail. BUT then realized this was 17 years old! I purchased this newer version and it arrived. Unwired and unplumbed from old and connections identical to new. Rewired and replumbed in about 45 minutes and it was up and running 100%. Highly Recommend Hayward products. I also use there pool pumps and sand filters among other odds and ends. Always satisfied!
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Reviewed in the United States on September 1, 2023 by Douglas Pilcher
Size: 200,000 BTU (W3H200FDN)
Works well, needs a single 20 Amp breaker
Reviewed in the United States on October 4, 2025 by Brian Seaglund
Size: 400,000 BTU (W3H400FDN)
Heater works great had a 200,000 Hayward prior to this and a 20,000 gallon inground pool the 200,000 struggled to keep up and eventually stopped working so I decided to go big with the 400 great move because it pretty much slipped right into the same fittings that the 200 had the only thing I had to change was my gas and that was minimal Had it up and running in a couple hours and heated the pool 20° overnight. The shipping was excellent R & L carriers delivered it. It showed up without a mark on it. It was a few days late, so I was mad about that but other than being a few days late I definitely go back to that company again they did a great job shipping it
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Reviewed in the United States on August 20, 2023 by jim
Size: 150,000 BTU (W3H150FDN)
I purchased the 150,000 BTU natural gas unit on sale in late May. I installed the unit with my friend that is a licensed NYS electrician. The install was quite easy. I actually fired it up in minutes once we completed the installation. My pool holds 20,000 gals of water, the actual water Temperature at start up was 74 degrees. I ran the pool pump & Heater from 11:30 PM To 6:00 AM. In the 7 hours time the pool Temperature Rose from 74 degrees to 92 degrees, that is a rise of 18 degrees in 7 hrs. The ambient outside Temperature was 63 degrees, I did NOT use my solar pool cover for this test. This LITTLE hayward heater is a DYNOMO. For the past 7 years I had a 110k electric heat pump and it to 5 days to reach the above temperatures. I purchased it on Amazon for $4195 Biggest WASTE OF MONEY in the north east. I made the switch for the above reasons and MOST OF ALL MY ELECTRIC BILL was $810 a MONTH with that Stupid heat pump. I even called my electric company and spoke to the Director of Engineering which is my equivalent and he agreed heat pumps are NOT as economical as alot of the so called experts say. Lastly the Hayward 150k BTU heater is a FIVE STAR in my professional opinion.
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Reviewed in the United States on July 13, 2023 by eddie macina