Lo on hayward pool heater

Check the Gas Valve. Start by ensuring that the gas valve is open and allowing the flow of gas to the pool heater. If the gas valve is closed or partially closed, the heater won't receive the necessary fuel to ignite. Make sure the valve is fully open and functioning correctly.

Lo on hayward pool heater. Hayward Commercial Pool's Universal H-Series ASME gas heaters are designed and certified for commercial use. The flagship of our H-Series line encompasses high-end features and construction materials as standard.

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Low NOx Pool Heaters: Low NOx refers to a type of pool heater, typically gas heaters, that are designed to emit fewer Nitrogen Oxides (NOx) when burning fuel. NOx emissions can contribute to air pollution and have harmful effects on the environment and human health. ... The Hayward Universal H-Series gas heater – the versatile and energy ...Jun 7, 2020 ... Diagnosis of common problems on a Hayward pool heater.Examples: Gas heater and heat pump exchangers, temperature and pressure sensors, VSP drives, pump motors, blowers, fan motors, compressors, robotic cleaner motors and power supplys, circuit boards, flow-switches, UV lamps, and keypads. 1 year parts warranty only. No labor coverage. XE series Power Ends and single speed Super Pump® TEFC motors.1. Locate the control panel. 2. Press the ‘Power’ button. 3. Set your desired temperature with the ‘Up’ and ‘Down’ buttons. 4. Press ‘Mode’ to activate the heating function. Pool Basics: How To Start/Light a Hayward H-Series Pool Heater.The Universal H-Series Low NOx heater has an 84 percent industry-leading thermal efficiency and complies with all current California 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.The Hayward 135,000 BTU Propane Heater for above ground pools combines state-of-the-art technology with ease of operation and superior performance. Electronic display with intuitive controls for an easy to use experience. The Hayward heater features an electronic, hot surface ignition system, the Hayward heater provides 135,000 BTU input, while ...For hayward pool heater if code repair, check the pressure switch and ensure proper pressure is being reached. Hayward pool heaters display an “if” code when the pressure switch is not closed. This is caused by insufficient water flow, closed valves, air in the system, or a clogged filter. It is important to identify and fix the issue ...

The Hayward H-Series' Finn Plate cupro-nickel heat exchanger has special V-groove design for faster heating and longer life. Hayward Universal H-Series, Low NOx, 250,000 BTU, Propane Gas, Pool and Spa Heater delivers energy efficient heating to your pool's water that you can trust. Hayward Universal H-Series - Versatility & PowerThe Hayward pool heater spa mode is designed to maintain a specific "spa-like" temperature in the pool. To use this mode, enable "Spa mode" from the control panel, set the required temperature, and let the pool heater warm the water. Once ready, test the water. This process is a joy to behold for those who want to soak themselves in ...LO on a Hayward Heater#VSP#2speedpump#backwashfilter#cleanfilter#aqualogicIt is compatible with the HAYWARD pool heater models listed in the bullet points. Please verify your model before purchasing. Highlights. OEM part # FDXLIGN1930; Compatible with HAYWARD universal H-series low nox pool heater models H150FDN, H150FDP, H200FDN, H200FDP, H250FDN, H250FDP, H300FDN, H300FDP, H350FDN, H350FDP, H400FDN, and H400FDP ...Oct 18, 2020 ... was getting CE code, aka Communication Error. Replaced main board, display board, and display panel.FibroPool Swimming Pool Heat Pump - FH255 55,000 BTU - for Above and In Ground Pools and Spas - High Efficiency, All Electric Heater - No Natural Gas or Propane Needed 4.1 out of 5 stars 73 1 offer from $2,199.992. Defective diaphragm valve or gas switch inside the pool heater. When we put the NG heater in for the pool, I also had a fire pit and BBQ on the same line. The gas company asked me for the total number of therms I had to supply to all water heaters, ovens, pool heaters, etc.The Hayward pool heater spa mode is designed to maintain a specific "spa-like" temperature in the pool. To use this mode, enable "Spa mode" from the control panel, set the required temperature, and let the pool heater warm the water. Once ready, test the water. This process is a joy to behold for those who want to soak themselves in ...

Hayward H-Series Low NOx Induced Draft H400IDL pool heater parts are available at Parts4Heating. We carry Hayward H400IDL control boards, flame sensors, pressure switches and many other replacement components. Both homeowners and HVAC professionals count on us for fast shipping and accurate orders.POOL AND SPA/HOT TUB HEATERS H150FD, H200FD, H250FD, H300FD, H350FD, H400FD & H500FD MODELS SERVICE & INSTALLATION MANUAL FOR YOUR SAFETY This product must be installed and serviced by authorized personnel, qualified in pool/ ... Tel: 08-355-75 www.hayward-pool.comConnect the water supply: Attach the pool heater to the water supply, following the manufacturer's instructions. Make sure to use the appropriate fittings and ensure a secure connection. Connect the gas supply: If you have a gas-powered hayward pool heater, connect it to the gas supply line using the correct fittings.Universal H-Series Natural Gas 400,000 BTU Low NOx. Hayward. SKU: W3H400FDN. The Universal H-Series is an energy efficient, high performance, installation adaptable commitment to the pool service professional. Add to Compare. Add to Export.The Superstore has all the Commercial Pool Heaters by Hayward to fit your pool supply needs! The store will not work correctly in the case when cookies are disabled. Free Shipping on orders $100 or more i. Hayward Sand Filters. Low as $399.00. Harris Pool Pumps. Low as $149.99. Pool Perfect. Low as /L. Hayward Pumps. Low as $ ...Here are a few tips to help you get your heater ready for the winter months: 1. Drain the water from your pool heater. This will help prevent any damage to the unit from freezing water. 2. Disconnect the power supply to your pool heater. This will prevent any accidental damage to the unit while you are working on it. 3.

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The Hayward Universal H-Series gas heater is one of the most energy-efficient Pool and Spa heating solutions on the market! Its ground-breaking hydraulic design reduces pump circulation run time, giving you an energy savings of up to 18%! This unit is perfect for the environmentally conscious Pool and Spa owner thanks to its Low NOx capabilities.Fix: Have the owner get a filter replacement/cleaning. Another common water flow issue is an open heater bypass valve. A bypass valve is put in place near the intake to stop water from flowing through the heater when it's not in use. When in bypass, the heater's water flow switch (i.e., the pressure switch) should open, and the heater will not run.Follow the included steps to place the heater in bypass mode for external control. Step 1. Press the ‘MENU ICON’ button to place the heater in ‘STANDBY’ mode. Step. The ‘SPA’ …The tech did the install and ran the heater only for a few minutes to check for ignition and stuff. He had done some other plumbing work so he didn't want to run in too long, or the pool pump either, so that the PVC glue really had some time to cure. The heater is a 400,000 BTU Hayward Universal HC Series Model HDF400 Pool Heater.Home - Trouble Free Pool | Trouble Free Pool

This item: Hayward W3H250FDN Universal H-Series 250,000 BTU Natural Gas Pool and Spa Heater for In-Ground Pools and Spas $3,179.00 $ 3,179 . 00 Get it Apr 24 - 29Hayward W3HP50HA2: Heat pump: Electric: 50,000: In-ground: Raypak P-R266-A-EP-C: Gas heater: Propane: 266,000: ... Pool heaters keep your pool at a comfortable temperature at all times, no matter ...The Hayward Universal H-Series gas heater is one of the most energy-efficient Pool and Spa heating solutions on the market! Its ground-breaking hydraulic design reduces pump circulation run time, giving ... Shop our wide selection of Hayward Pool Heaters; Return Policy; Product Information. Internet # 311793695. Model # HPPW3H150FDN. Store SKU ...cannot get hayward pool heater to heat past 80 degrees. it shuts off once it reaches 80. and I cannot even raise the temp on the panel past 80 ... HI, I have a Hayward Pool Heater Lo Hox (I think the name) it is about 40,000 BTU natural gas 240 Volt. Blower moter in side. It has ran great for the past 6 or so years.When it comes to troubleshooting Hayward pool heaters, theres not too much difference between the problem solving process for other gas-fired heaters, made by POOL LOVE CLUB. Saturday, April 6, 2024 ... A LO code on a Hayward heater can be caused by any of the following: a faulty water pressure switch, a faulty vent pressure switch, a faulty ... HeatPro Series Heat Pump. Hayward. SKU: HP21405T. Our new HeatPro Series of Heat Pumps utilize industry-first microchannel technology to get your pool water to the perfect temperature. Add to Compare. Add to Export. Overview. Specifications. The Universal H-Series 150,000 BTU Propane Gas Pool & Spa Heater from Hayward provides reliable, long-lasting comfort for pools and spas with a surface area of up to 400 ft. Built with a durable cupro nickel heat exchanger, it offers exceptional protection against corrosion and premature failure caused by unbalanced water chemistry, ensuring ...Homemade Solar Water Heaters - Homemade solar water heaters can help you save money for more important matters. Visit HowStuffWorks to learn all about homemade solar water heaters....Hayward H400IDL pool heater rust on burn tubes, corrosion on heat exchanger. Thread starter cowgs; Start date Apr 9, 2021; Jump to latest Follow Reply Forums. Equipment - Build, Use, and Repair. Everything Else . C. cowgs 0. Sep 5, 2009 2. Apr 9, 2021; Add bookmark #1 Hello I just took apart my 16 year old Hayward natural gas pool heater to ...(4 out of 5 stars) Efficient, easy to use Pool Heater. Reviewed By: David B. from Boston, MA (9/7/2010) The Hayward 250 BU Lo-Nox natural gas heater is efficient and works quite well. More efficient than our old Hayward microvolt 250 BTU heater.The Hayward H-Series' Finn Plate cupro-nickel heat exchanger has special V-groove design for faster heating and longer life. Hayward Universal H-Series, Low NOx, 250,000 BTU, Propane Gas, Pool and Spa Heater delivers energy efficient heating to your pool's water that you can trust. Hayward Universal H-Series - Versatility & Power

I have a hayward H250 pool heater. Keeps cycling on and off. I have checked all of the limited switches w/ a ohm meter and all seem to be fine. The pressuse switch seems to be fine however i'm wondering about the pool pump not being to produce enough pressure . ... H250 hayward heater goes right into LO and dervice light comes on ...

From the Manufacturer. Hayward H400FDP Universal H-Series Low Nox Propane, Heater, 400,000 BTU. The Hayward Universal H-Series gas heater is the "universal" energy efficient remedy for any Newer existing pool or spa.Billy, Im still working on the LO code. I jumpered 1) The water pressure switch, and 2) the vent pressure switch which is a series with the water press switch.Hayward's pool heater saves money by being the most energy efficient solution for any pool/spa. It's designed for ultimate performance, comfort and durability while being environmentally responsible. For rapid comfort, we offer the Universal solution. Universal H-Series. H300FDP Universal H-Series Propane Gas 300,000 BTU Low NOx (Expert Line ...HeatPro In Ground Heat Pump, 140,000 BTUs, Square Platform. Hayward has an advanced lineup of gas heat and electric heat and heat+chill solutions to deliver the ultimate control of your water temperature.1.3 Heater Cycling On And Off. 2 Troubleshooting Steps. 2.1 Check Gas Pressure And Fuel Supply. 2.2 Inspect Air Supply And Venting. 2.3 Ensure Proper Water Flow. 2.4 Clean Filters And Pump. 2.5 Adjust External Bypass If Needed. 3 Tips For Diagnosing Problems. 3.1 Follow The Heater Start Sequence.Hayward Insights provides expert advice, tips, and industry updates to help pool owners and enthusiasts with their swimming pool experience. Gain insight. ... Phase Heaters: 1.0000: Pool Type: In Ground: Product Dimensions: 24 " x 40 " x 29.5 "Product Height: 24 in: Product Length: 29.5 in: Product Weight: 245 lb: Product Width: 40 in:Sep 15, 2020 ... 3:11. Go to channel · Pool Heater Won't Start. Swimming Pool Steve•212K views · 3:10. Go to channel · Hayward Heater on LO. B&L Pools•...

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Hayward Insights provides expert advice, tips, and industry updates to help pool owners and enthusiasts with their swimming pool experience. Gain insight. ... Phase Heaters: 1.0000: Pool Type: In Ground: Product Dimensions: 24 " x 34 " x 29.5 "Product Height: 24 in: Product Length: 29.5 in: Product Weight: 195 lb: Product Width: 34 in:LO on a Hayward Heater#VSP#2speedpump#backwashfilter#cleanfilter#aqualogicI have a hayward h300 series heater with a lo pressure always on. I have replaced the pressure switch and cleaned - Answered by a verified Pool and Spa Expert. ... HI My Hayward Hseries pool heater shows a LO and stops working when it rains. My temp dropped from 92 to 80. ...Hayward W3H135FDP H-Series 135K BTU Propane Above Ground Pool and Spa Heater $ 1,999.00 Read more Hayward HAXPLT1932 ED1 LP Pilot $ 198.00 Add to cart Hayward CZXPRS1105 Water Pressure SwitchStep 2: Locate the inlet and outlet valves on your pool heater. These are typically labeled with "in" and "out" indicators. Step 3: Turn the valves to the closed position. This will stop the water flow through the pool heater. Step 4: Install a bypass pipe between the inlet and outlet pipes on the pool heater.The flow in a particular pool is affected by a number of factors, many of which you can't easily change like the size of your pipe, number of 90deg connections, etc. Heaters require 40gpm to operate.Our network of certified personnel can help you build your pool, recommend a product, repair a faulty product, and test your water. Find a professional near you. Hayward offers environmentally responsible, cutting-edge pool and spa equipment for residential and commercial, in-ground and above-ground pools.NOTE: the maximum temperature set point is 104° F. 13. Hayward H400FDN | Universal H Series Troubleshooting Guide - Page 14. in bypass mode for external control. Step 1 Step 2 Press the 'MENU ICON' button to place the heater in 'STANDBY' mode. Step 3 Press and hold the minus & plus buttons for 3 seconds. ….

Exiting Bypass Operation. To exit bypass operation and resolve the bO Code problem, follow these steps: First, set the heater to standby mode. Next, press and hold the Down key and MODE key for three seconds. Finally, verify that the display no longer shows the "bO" indication.May 31, 2023 · Professional Assistance: If you have followed these steps and the IF code persists, it is recommended to contact a professional technician who specializes in pool heater repairs. They have the expertise to diagnose and resolve complex issues and ensure your heater is functioning properly. Hayward Pool Heater LO Code What Does The LO Code Mean? This blower vacuum switch is designed to use with Hayward Universal H-Series Low NOx pool heater models H150FDN, H150FDP, H200FDN, H200FDP, H250FDN, H250FDP, H300FDN, H300FDP, H350FDN, H350FDP, H400FDN, H400FDP. Weighs 4.8 pounds.I have a Hayward 300k BTU heater. It's light comes on and shows low. When water pressure increases the "Lo" sign goes away but I can't get the mode to switch to pool.Hayward Insights provides expert advice, tips, and industry updates to help pool owners and enthusiasts with their swimming pool experience. Gain insight. ... Phase Heaters: 1.0000: Platform: Round: Pool Type: In Ground: Product Dimensions: 40 " x 31.5 " x 31.5 "Product Height: 40 in: Product Length: 31.5 in: Product Weight: 247 lb:Turn the thermostat all the way up on the heat pump. These units are not compatible with 3 wire remotes. For 2 wire air switch installations remove the jumper between terminals 1 & 2 and replace it with the 2 wires from your switch. Set the thermostat on the heat pump to the desired temp. Wiring Diagram HPABG / HP380.My Hayward h400 pool/spa heater will not turn on any longer. It is getting power but the combustion blower which turns on first is not turning on. There is no gas smell and no igniter spark happening. …Connect the water supply: Attach the pool heater to the water supply, following the manufacturer's instructions. Make sure to use the appropriate fittings and ensure a secure connection. Connect the gas supply: If you have a gas-powered hayward pool heater, connect it to the gas supply line using the correct fittings.Factory original Hayward part. For H300FD Series Heaters. Hayward part number UHXPOSHZ13001. Learn More. Add to Cart. Wishlist. Compare. Hayward CHXGEN1930 Pilot Generator - Comfortzone / Heatmaster HM2. $88.99. Lo on hayward pool heater, Hayward pool heaters offer several advantages, including affordability, a wide range of options, and user-friendly controls. The company's heaters are designed to be easy to use and install, making them a popular choice for pool owners who want a reliable heating option without breaking the bank. Hayward also offers a range of heater sizes ..., First, check the power source. Make sure the heater is properly plugged in and that the circuit breaker or fuse hasn’t tripped. Next, check the water flow. A low water flow can cause the heater to overheat and shut down. Check the pool pump and filter for any clogs or debris that could be restricting water flow., 6.99K subscribers. Subscribed. 25. 8.9K views 1 year ago. If you're looking for help fixing your Hayward Pool Heaters, look no further! Our comprehensive Hayward Pool …, FAQ: What are the Hayward pool heater lockout settings? The maximum lockout settings for the pool mode are 90ºF and 104ºF for the Spa mode by default., Buy a Hayward W3H200FDN Universal H-Series H200 Low NOx Pool Heater, 200,000 BTU, Natural Gas at The Pool Supplies Superstore. FREE Shipping. Guaranteed Lowest Price., Swimming Pool Heater Hayward H250FD Owner's Manual. Pool and spa/hot tub heaters (16 pages) Heater Hayward H250FDN Service & Installation Manual ... may relate to water flow. Verify the pump is running & adequate water is flowing through heater. “LO” is NORMAL when the pump is turned off. Inspect water pressure switch Continuity test Step ..., Use the “Mode” key to change your heater’s settings. Select the “Standby” Option and put the heater on it. Press the remote’s “Down” key and hold it and then press the Mode key and hold it simultaneously. For 3 seconds, hold down both the “Down” and “Mode” keys as long as the “bo” code doesn’t remove from your ..., The Hayward Universal H-Series gas heater is one of the most energy-efficient Pool and Spa heating solutions on the market! Its ground-breaking hydraulic design reduces pump circulation run time, giving you an energy savings of up to 18%! This unit is perfect for the environmentally conscious Pool and Spa owner thanks to its Low NOx capabilities., Factory original Hayward part. For H300FD Series Heaters. Hayward part number UHXPOSHZ13001. Learn More. Add to Cart. Wishlist. Compare. Hayward CHXGEN1930 Pilot Generator - Comfortzone / Heatmaster HM2. $88.99., Hayward H400IDL pool heater rust on burn tubes, corrosion on heat exchanger. Thread starter cowgs; Start date Apr 9, 2021; Jump to latest Follow Reply Forums. Equipment - Build, Use, and Repair. Everything Else . C. cowgs 0. Sep 5, 2009 2. Apr 9, 2021; Add bookmark #1 Hello I just took apart my 16 year old Hayward natural gas pool heater to ..., My pool heater quit working. It would try to start, but then fail. The error code "IF" was displayed. It was an "Ignition Failure Lockout". I looked at a..., Our network of certified personnel can help you build your pool, recommend a product, repair a faulty product, and test your water. Find a professional near you. Hayward offers environmentally responsible, cutting-edge pool and spa equipment for residential and commercial, in-ground and above-ground pools., The Hayward Universal H-Series gas heater is one of the most energy-efficient Pool and Spa heating solutions on the market! This unit is perfect for the environmentally conscious Pool and Spa owner thanks ... Shop our wide selection of Hayward Pool Heaters; Return Policy; Product Information. Internet # 311793700. Model # HPPW3H250FDN. Store ..., Hayward H-Series Heater High Wind Stack | HWS250. $422.59. Quantity. As low as $19.50/mo*. Platinum Preferred Manufacturer. Proposition 65 Warning. Product description. Warranty., Hayward W3H150FDN Advanced Features. Standard cupro nickel heat exchanger. Excellent salt water and chemical corrosion resistance. Exclusive "Totally Managed" cupro nickel heat exchanger water flow. Same water velocity through all tubes for faster heating. Patented header by-pass design. Up to 18 percent savings by reducing pump run-time, This blower vacuum switch is designed to use with Hayward Universal H-Series Low NOx pool heater models H150FDN, H150FDP, H200FDN, H200FDP, H250FDN, H250FDP, H300FDN, H300FDP, H350FDN, H350FDP, H400FDN, H400FDP. Weighs 4.8 pounds., Hayward H-Series heater for above ground pools and spas combines reliable technology with ease of operation and superior performance. H-Series heaters boast industry-leading hydraulic performance coupled with a 135,000 BTU rating for faster speed-to-heat capability. Their intuitive electronic panel is also quick and easy to operate, so pool ..., Here are a few tips to help you get your heater ready for the winter months: 1. Drain the water from your pool heater. This will help prevent any damage to the unit from freezing water. 2. Disconnect the power supply to your pool heater. This will prevent any accidental damage to the unit while you are working on it. 3., Home - Trouble Free Pool | Trouble Free Pool, The Hayward H-Series' Finn Plate cupro-nickel heat exchanger has special V-groove design for faster heating and longer life. Hayward Universal H-Series, Low NOx, 250,000 BTU, Propane Gas, Pool and Spa Heater delivers energy efficient heating to your pool's water that you can trust. Hayward Universal H-Series - Versatility & Power, THE PERFECT HEATER FOR ANY POOL APPLICATION! Hayward's NEW Universal H-Series Heater combines advanced technology with universal fit flexibility, making it the perfect heater for new or existing installation. This new design offers left-side or right-side electric, gas and water connections, with 110v or 220v electric hook up., ManualsLib has more than 81 Hayward Swimming Pool Heater manuals. Click on an alphabet below to see the full list of models starting with that letter: A C E H S T W. Popular manuals. 43 pages. HeatPro® Owner's Manual. 12 pages. H100ID1 Installation & Operation Manual. 16 pages., Find helpful customer reviews and review ratings for Hayward W3H250FDN Universal H-Series 250,000 BTU Natural Gas Pool and Spa Heater for In-Ground Pools and Spas at Amazon.com. Read ... 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 …, Fits hayward universal h-series low nox pool heater models h150fdn, h150fdp, h200fdn, h200fdp, h250fdn, h250fdp ; Also fits hayward universal h-series low nox pool heater models h300fdn, h300fdp, h350fdn, h350fdp, h400fdn, h400fdp ; Weight 5.9 pounds ; Customer ratings by feature . Easy to install . 4.4 4.4 ., Step 4: Disconnect Blower connector from the Control Module.Set the heater to the Pool or Spa setting. To generate a call for heat, lower the set point temperature. Step 5: Measure 120VAC along pins 1 and 2 during the pre-purge period., Fits hayward universal h-series low nox pool heater models h150fdn, h150fdp, h200fdn, h200fdp, h250fdn, h250fdp ; Also fits hayward universal h-series low nox pool heater models h300fdn, h300fdp, h350fdn, h350fdp, h400fdn, h400fdp ; Weight 5.9 pounds ; Customer ratings by feature . Easy to install . 4.4 4.4 ., 1.3 Heater Cycling On And Off. 2 Troubleshooting Steps. 2.1 Check Gas Pressure And Fuel Supply. 2.2 Inspect Air Supply And Venting. 2.3 Ensure Proper Water Flow. 2.4 Clean Filters And Pump. 2.5 Adjust External Bypass If Needed. 3 Tips For Diagnosing Problems. 3.1 Follow The Heater Start Sequence. , The Hayward Universal H-Series gas heater is one of the most energy-efficient Pool and Spa heating solutions on the market! Its ground-breaking hydraulic design reduces pump circulation run time, giving ... Shop our wide selection of Hayward Pool Heaters; Return Policy; Product Information. Internet # 311793695. Model # HPPW3H150FDN. Store SKU ..., Hayward H-Series Pool Heater Pressure Switch - FDXLWPS1930. $55.99. Qty: ADD TO CART. IN STOCK. FREE SHIPPING. Details Q&A: Ask a Question Q&A: See Answers (3) Customer Reviews (1) Parts (3) Part # 6223-180. By Hayward Pool Products., Hayward Heaters H-Series ED2 Parts Diagram H-Series Heaters, H150ED2,H200ED2,H250ED2,H350ED2, H400ED2 Heaters. Hayward Heaters H-Series Parts List H-Series Heaters. Key Model Description Product ID Buy Me; 1: HAXJKT1150: Jacket Top Assembly, 150: HE-05510: BUY ME : HAXJKT1200: Jacket Top Assembly, …, We have a 30,000 gallon salt pool with a Hayward model H400FDN pool heater. The water turns green and the vinyl liner and fiberglass stairs get badly stained. I'm told by 2 pool companies that the hea …, Hayward Universal H-Series Induced Draft Pool Heater 250K BTU Natural Gas W3H250FDN (also known as H250FDN) is energy-efficient. 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 Universal H-Series Induced Draft Pool Heater represents innovative heating technology for pools ..., While all Hayward H-Series heaters are energy-efficient, the Universal H-Series 200 Low NOx natural gas heater has an 83-84 percent leading thermal efficiency. Cart. ... Hayward Universal H Series Low NOx 200,000 BTU Natural Gas Swimming Pool Heater SKU: W3H200FDN. 4.8 See Reviews (4)