Top 15 Best Gas Pool Heaters Reviews 2020

Some pool owners may think that pool filters and pool covers are the only essential items to make your pool swimmable. But swimming junkies will definitely own a pool heater to be able to enjoy swimming all year round. But what model is suitable for your pool and worth spending your money on? Check out our list of 15 best gas pool heaters to buy in 2020 to find out now!

Among various kinds of pool heaters, gas pool heaters stand out from the crowd for they are highly effective and their prices are generally affordable. They can work well even in the coldest and most humid climate thanks to pretty high BTU ratings. After some serious researching and consulting with experts and users, we finally came up with a list of top 15 best gas pool heaters you surely cannot miss in 2020. Let’s jump right in and stay till the end for some tips you cannot miss!

best gas pool heater
best gas pool heater
best gas pool heater

Best environmentally friendly

Best quality in price range

Lowest operating cost

** Below, you will find our detailed reviews of the best gas pool heater, but you can also click these following links to see current prices or read customer reviews on Amazon.

Top 15 Best Gas Pool Heater Reviews 2020

Hayward H400FDN

If you are looking for something of which performance lives up to its price, you really cannot miss out on Hayward in general. The Hayward H400 is pretty new to the market but it won over customer’s hearts right away. 

This unit delivers amazing performance while maintaining their reasonable price. If you have already owned a pricey pool heater, chances are it is much more expensive than the Hayward H400 and only has more than half of its features at best.

It has a Standard Cupro nickel heat exchanger for superior value and reliability. It is also pretty friendly to the environment due to its little NOx emissions.


  • Environmentally friendly
  • Versatile professional installation
  • Reasonable price
  • Sleek design
  • Can heat up big pools quickly and effortlessly


  • May not last very long without proper maintenance

Hayward W3H400FDN

The Hayward W3H400FDN offers you quiet and efficient heating that can turn your pool into a place where you can enjoy even in the coldest winter months. And the best part is, it does not take much time and effort to self install this product!

Similar to other Hayward products we mentioned in this post, it is fairly eco-friendly for it is certified for little gas emissions. This feature is highly appreciated among users since it is safe for users and the environment.


  • Efficient
  • Runs quietly and smoothly
  • Eco-friendly
  • Quick heating time


  • May not be delivered to some areas

Hayward H250FDN

Are you looking for something with all the best qualities and features of a Hayward but with more heating power? Look no further! This product got exactly what you need. With the heat output of 250,000 BTUs, the Hayward H250FDN is considered to be one of the strongest pool heaters in the market whilst maintaining efficiency.

Besides traditional features, this model includes many additional features that utilize its heating speed. It also has an easy-to-operate LED control panel and other modern features. 

If there is any device that you should rely on to deliver the best performance possible with just the press of a button, it is the Hayward H250FDN.


  • Can heat up your pool relatively quickly
  • Simple installation
  • Very efficient
  • Affordable comparing to its effectiveness


  • May be noisier than other heaters

Hayward H200FDN

This model is at least in the top 10 best-sellers on the market. It is an affordable product but that does not mean that it lacks strong qualities that put it in this list!

The  unit comes with an amazing efficiency of thermal and a variety of features that you usually see in high-end pool heaters. However, this product works best with small to medium size pools.

This product also includes other features such as heat exchanger, a unique nitride ignition made of silicone,...


  • Affordable
  • LED display
  • Durable, can last you a long time
  • Energy-efficient


  • Not suitable for large pools, it may take longer time to heat up 

Pentair 460805

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The Pentair 460736 surely is one of today’s top quality gas pool heaters. It has the heat output of 400,000 BTU, which helps it heat up to 30,000 gallons or more in no time.

This product provides an advanced system, best in price range efficiency and high-quality design which make it so popular among users.

It also has a rotating digital display and user-friendly controls, even beginners can learn to love this product instantly.


  • Energy-efficient
  • Can heat up big pools quickly and effortlessly
  • Durable, can last you a long time
  • Digital controls


  • Operating cost may be expensive

Raypak 336,000 Btu

The prize for best mid-range price goes to this one, the Raypak 336,000 BTU. This product has been introduced to the public for a while and yet it still maintains its rank in customer’s heart.

The price of this product is not necessarily the cheapest, but compared to its various features, this is a great investment in the long run. This device is suitable for small to medium pools, larger pools will require longer time to be heated up. 

The cabinet and internals are made with non-corrosive and rust resistant material. Its microprocessor-controlled thermostat can be set precisely to your desired temperature as well.


  • Includes PolyTuf powder coating, polymer headers, and an all copper-fin-tube heat exchanger
  • Energy-efficient
  • Made with durable materials
  • Easy to control


  • May be a little bit pricey

Pentair 460733

No products found.

With just a simple press of a button, your pool will become a tropical oasis even at night or in cold weather, is this a dream come true or what? 

This product includes a rotating LED display, which gives a state-of-the-art feel to it, with digital controls. It also has a heat exchanger made of Cupro nickel and many other special features. Because it is made of durable material on the outside, this device certainly will last you a very long time, especially with proper maintenance.

It can heat up most pools efficiently within an hour or so, larger pools may take longer time to heat up because it has a heat output of 250,000 BTUs. A hot surface ignition and digital push-button controls are there to help you adjust the right temperature of your pool more effectively and effortlessly.


  • Highly efficient
  • Made with durable materials
  • Suitable for average and large size pool
  • Great heating power


  • May require professional installation

Pentair 461059

No products found.

The Pentair 461059 is definitely one of the finest models you can get for your private pool. It is packed with 125,000 BTUs heating capacity power that is able to heat up your pool in no time and create a relaxing, comforting experience.

This product is durable due to its design and structure. It surely will last you a very long time if you take care of it properly. 

It is designed to be easy to control with a digital display control panel, even beginners can use this device effortlessly without any trouble. 


  • Highly efficient
  • Easy to control 
  • Durable, made with special material that is ideal for outdoor placement
  • Corrosion free


  • Works better with small to medium sized pools

Hayward H150FDP

Hayward does it again, another one of them has made it to our list. This device is considered the best propane pool heater on the market. This device is yet another compact and sleek design that barely looks like a gas pool heater. If you do not know any better, you probably would think this is a printer or a photocopier of some sort.

The Hayward H150FDP runs on propane, which may be costlier than natural gas but that is why this product can be used anywhere, even when you do not have a natural gas line in your house. 

Like many other Hayward products, this device not only includes a standard Cupro nickel heat exchanger, but it also has a bypass valve and polymer header, which utilizes its heating efficiency. It is pretty environmentally friendly thanks to little NOx emissions as well.

For it is a only 150,000 BTUs output heater, this product thrives with medium sized in ground pools and average above ground pools.


  • Quick heating speed
  • Accurate temperature settings
  • Easy to control
  • Affordable


  • Fairly noisy, especially at night

Hayward H400FDN

This product is from, yes, you know it, Hayward again. The quality control regimes of Hayward company had a great reputation for decades, that is why so many of their products have made it into our list.

This unit specifically runs quietly, even though it is quite large compared to other models. Feel free to turn it on at night if you would like to prepare for your morning swim, it will not disturb your neighbors! Its design may look simple, but its power is certainly not something to be disregarded. This machine can heat up a medium sized pool in less than an hour.

The Hayward H400FDNASME is guaranteed to be reliable and efficient with the-best-you-can-get Titanium heat exchanger.


  • Include titanium heat exchanger
  • Runs smoothly and quietly
  • Durable, can last you a very long time


  • Slower heating time compared to other Hayward models

Jandy Pro Series JXi

The cutie patootie is one of the smallest gas pool heaters on the market. It can be approximately 40% lighter and 30% more compact than most pool heaters available. However, it is surprisingly durable and sturdy.

The Jandy Pro Series JXi is also extremely efficient with an 83% thermal energy efficiency rating and insignificant gas emission. Hence, the device is pretty eco-friendly as well.

Thanks to its digital display control, this gas pool heater is absolutely easy to use and it can adjust temperature accurately.


  • Compact design
  • Easy to relocate 
  • Reasonable price
  • Runs smoothly and quietly


  • May require professional installation from experts

Hayward H100id1

If you are willing to buy a more-on-the-expensive-side device for your pool, the Hayward H100ID1 is definitely something you cannot miss. Do not mistake it for its simple appearance, this machine packs quite a lot of effectiveness when in use.

The Hayward H100ID1 is most trusted and preferred by both users and non-users.


  • Highly energy-efficient
  • Performs smoothly and long-term
  • Most customers recommend this model
  • Compact and sleek design


  • A little bit pricey

Sta-Rite SR333NA

No products found.

This product, without any doubt, is one of the best natural gas pool heaters available. For such a light, compact, igloo-like design, the Sta-Rite SR333NA sure packs quite a bunch.

It has the heat output of 400,000, pretty heavy so it fits your needs perfectly if you have a large pool. The outside is made of durable, long-lasting material so as to ensure customers that it can be used for a long period of time. 

This gas pool heater comes with a huge LCD display with push-button controls. Hence, you can easily adjust the right temperature of your pool without any problems.


  • Small and compact design
  • Energy-efficient
  • Low operating costs
  • Durable, can last you a very long time


  • May be a little too noisy for a small device 

Raypak 014784

This one is rated the best product from Raypark. It is made of water-resistant, durable material with a smart design that guarantees you a long time of usage.

The Raypak 014784 is versatile in use, whether it is an in-ground pool or an above-ground pool, small or medium or large, this device can heat it up in a reasonable amount of time. 

This device is designed so that customers can easily self-install it, no experts or professionals required! It holds a 156,000 BTU heat output gas pool heater, not too much it will cost you a fortune just to keep it running, but it is efficient and eco-friendly.


  • Easy to install
  • Easy to relocate
  • Suitable for various pools size and placement
  • Performs smoothly and long time


  • May take longer time to heat large pools in cold climate

Zodiac LRZ125ENC

This compact, lightweight design packs quite a bunch! It is actually more powerful than it looks with the heating output of 125,000 BTUs, which cuts down heating time to almost half. 

The Zodiac LRZ125ENC comes with top quality copper tubes certified by ASME. This handy device is also equipped with special technology that ensures no heat can escape from your pool to the environment and everything is utilized for the heating process. 

This product performs well in cold climates and it is fairly durable and really does not cause too much noise when operating.


  • Corrosion free outer panel
  • Easy to control
  • Environmentally friendly 
  • Compact design


  • Limited reviews from users
  • May be too noisy to be operated at night

Best Gas Pool Heaters Take Away: Buying Guide And Tips

How A Gas Pool Heater Works

best gas pool heater

To determine which makes a gas pool heater stand out from the crowd, first we must understand how a gas pool heater works. Gas pool heaters can be fueled by either gas or propane. The gas pool heater uses a special device to circulate the pool’s water, drawing the water through a filter to the heater. The water then flows to the combustion chamber. Here, the water is heated up and then flows back into the pool. The heating process of the gas pool heater makes it compatible for quick heating purposes.

Choosing The Right Size

Sizing a gas pool heater is an elaborated process. It basically comes down to the size of the pool and the average temperature of the pool. There may be more factors that influence the pool's temperature such as wind exposure, humidity and night temperature. Hence, the location of the pool is pretty crucial when it comes to choosing a pool heater as well. If your pool is placed in a surrounding area that does not usually have high-speed wind, the pool heater's size is not as large as those placed in an open, windy area. 

best gas pool heater

Ideally, a professional pool analyzer to properly analyze your pool's size to decide what size of heater you need. However, you can estimate your pool size to choose a suitable gas pool heater as long as you follow these steps:

  • Decide your preference temperature for your pool

  • Determine the lowest temperature during pool-using months in your area

  • Determine the lowest temperature in winter months and your preference temperature and calculate the difference between them, the result gives you the temperature needed to be risen

  • Determine the pool surface area (in square feet)

  • Use the following algorithm to calculate the size of the pool heater:

Pool Area x Temperature Rise x 12

Here are some examples that you may find helpful when calculating the gas pool heater's size:

(Gas pool heaters are rated by BTU output.)

Pool Surface Area (sq. ft.)

















best gas pool heater

If you are looking for a product that surely delivers quality, consider models made from long-lasting material that are highly durable. Make sure that the unit you buy comes with a heat exchanger. Headers made of polymer or resin are also important for your gas pool heater to perform more smoothly and adapt well with various conditions.

Proper maintenance also plays an important role to keep your device operating smoothly and long-term. You may have to tune up your pool once a year and thoroughly clean it. If you take care of your gas pool heater carefully, it may last up to 7 years.

Operating Cost

Generally, gas pool heaters cost less than electric pool heaters. But their operating cost may vary, depending on your personal condition.

best gas pool heater

Gas pool heaters often use natural gas or propane as fuel. If there is a natural gas line in your house, natural gas is definitely the way to go here since it would cost less and easier to find. Propane, on the other hand, is more versatile as it does not rely on your gas line, but it is more expensive and required to be delivered frequently. However, there are other elements that affect the operating cost of your gas pool heater that you should take into account when deciding to buy a gas pool heater.

Different efficiencies also affect your operating cost. Nowadays, you can easily buy models that are 85% - 95% efficiency, as described on the label. Here is a chart of average price costs saved for a gas pool heater that is 95% percent efficient in 3 different states in the US, check it out for your reference:






















best gas pool heater

It is best for your heater that the controls are convenient and easy to use. Most gas pool heaters come with a knob to adjust the desired temperature. Others may have an LCD screen with touchscreen and other features, some may even include a timer, a process monitoring and an efficiency display. But they surely will cost you some more bucks. If you are on a budget and do not want anything specific, just a simple adjusting system like a knob is more than enough.


Some gas pool heaters may be costlier at the initial price, but in the long run they may be more efficient. 

Heaters that include LowNOx emission standards are more environmentally friendly and efficient.

Use pool covers to preserve heat and avoid water evaporation.

Comparing Gas Pool Heaters And Electric Pool Heaters

best gas pool heater


A gas pool heater surely is more economical compared to an electric one in the long run. On average, a gas pool heater will cost you around 5000$ per year (including maintenance and fuel fees) whereas an electric pool heater will cost you at least 6000$ annually (depends on the electric price in different areas and the device’s efficiency).


Gas pool heaters generally cost less ($$$-$$$$) than electric pool heaters ($$$$-$$$$$).


best gas pool heater

Both gas pool heaters and electric pool heaters may last from 5 to 15 years, depending on how you use the device and how you take care of it. But normally, taking care of an electric pool heater is easier though it may cost more.

Working Environment

Gas pool heaters can work in any environment, even where there is no available electric line. They perform better than electric ones in cold climates as well.

How To Properly Take Care Of Your Best Gas Pool Heater

best gas pool heater

Taking care of any household appliances is tedious, we know! But it is absolutely the most critical thing that you need to do in order to extend the lifespan of your devices. The same thing goes for your gas pool heater. Not only should you use your unit with caution, but also take care of it properly to maintain its working effectiveness and make sure you can make the most out of it. Especially when gas pool heaters are more of some-what dangerous household devices for they can shock you! Extra caution is never redundant with these types of appliances, you do not want to injure yourselves and your family just because you did not properly maintain your gas pool heaters.

If you are thinking that cleaning it on the exterior only is enough, you might want to reconsider your perspective. Servicing your gas pool heater is not necessarily a hard thing to do, but it surely takes a lot of meticulous work and patience. Do not be hasty with your gas pool heaters, folks! If you do not know how to service your gas pool heater, we have some tips that you definitely cannot miss. You should follow these steps to make sure that you are doing it right for your gas pool heater.

Check Your Water’s Condition 

One thing that people often pass by is the pool’s chemical balance condition. The water in your pool flows directly into the gas pool heater, most likely without any filters at all. Therefore, if the water is contaminated with chemicals like too much cleaning liquid or chlorine, it will more or less cause  the inside of your machine to rust faster and therefore, lessen its lifespan. Moreover, if the water on your pool is in poor condition, it will probably be harmful to you and your loved ones as well. Just a tiny bit different in pH level can cause a whole lot of problems, for example: 

  • A pH level of 7.0 is 10 times more acidic than a pH of 8.0

  • A pH level of 6.0 is 100 times more acidic than a pH of 8.0

  • A pH level of 5.0 is 1000 times more acidic than a pH of 8.0

best gas pool heater

(The more acidity, the more harm it is for your skin and machine)

The US Centers for Disease Control and Prevention also suggests people who own pools and swim regularly check their pool’s water pH level to prevent any unwanted situations.

Unbalanced pH level pool’s water is an annoying and unhealthy  problem. It can be easily avoided if you regularly check and control your pool’s water pH balance. We recommend you do this weekly and most ideally, you should have it done by a professional. However, you can test the chlorine and pH level of pool water yourself with test strips.

Clean Up Your Gas Pool Heater During Winter Months

best gas pool heater

It is crucial to clean out all of the water inside of your gas pool heater during the coldest months. When you turn off your device, left over water is still trapped inside the machine. When the temperature drops below freezing temperature, the water turns into ice and expands its volume while still being trapped in your gas pool heater. This might be the reason why you find your gas pool heater has leaking and even bursting pipes during the winter months. If this phenomenon happens, you will have to replace the pipes and it will not be covered by warranty.

So how to avoid massive replacement fees? Simple. You should let your heat exchanger drain dry after using the gas pool heater. Even though pool heaters are designed to work under low temperature environments and the method we just mention is more of a precaution, it will help you use the device more efficiently and effectively.

Cover Your Device 

best gas pool heater

This is a fairly obvious advice, yet many users sometimes still neglect their gas pool heaters out in the cold, snowy winter uncovered. There are now many kinds of winter covers for pool heaters that are made with special material that can handle snow, rain, ice, dust… all the things can be harmful for your device. If you did not have one of those covers, get one now! They will keep your unit looking as sharp as new and increase the lifespan of your gas pool heater. Especially for a gas pool heater, which needs a respectable space above it to disperse the hot exhaust fumes. You should always keep the top of your gas pool heater clean of leaves and foliage to avoid firing hazard.

Cover Your Pool

best gas pool heater

Imagine this, you are cleaning the room. You keep cleaning and cleaning and you are almost finished cleaning, but there are others on the other side of the room, deliberately littering, which causes you to keep cleaning and cleaning. Feel tired? Absolutely yes! So does your gas pool heater. When you are not using the pool, You should cover it to maintain its temperature as much as possible so that your gas pool heater will not have to work so hard every time you use it. Plus, covering up your pool also prevents the water from evaporation. So what are you waiting for?

Get Professional Inspections

best gas pool heater

You should get your machine checked out by a trained pool heater service once a year to make sure that your machine is still working normally. There may be something wrong with the inside of the gas pool heater that is not visible to the eyes of the unprofessionals. Therefore, having your gas pool heater checked by a professional is highly recommended to avoid any dangerous accidents. Getting help from professionals will always cost you some extra money, but it is still a fairly cheap price to keep yourself and your family far from harm, right?

Check out this video for more information about DIY install gas lines connecting to your gas pool heater (please do this with caution if you plan to do this yourself, consult an expert beforehand is always a great idea!)

Conclusion: My Top Pick For Best Gas Pool Heater

There are loads of elements that can affect your decision in buying a gas pool heater but it surely is an exciting experience. With a suitable pool heater, you can extend the swimming season while simultaneously enhancing your swimming experience, for even in the summer, the water temperature in your pool may drop significantly at night time.

Based on your personal needs, you can pick an affordable gas pool heater limited function or you can experience many other additional features if you are willing to pay some extra bucks. Whichever one you choose, a gas pool heater must be able to do its job heating up your pool’s temperature, creating a relaxing and soothing environment for you anytime you need. To ensure that you put your money in the right place, we came up with a list of 15 best gas pool heaters for your consideration. All of those 15 models we introduced have passed our quality standard and each one has unique features that we find interesting and helpful for customers.

Among the aforementioned models, we have selected our top 3 best gas pool heater in 2020 that we think you should definitely check out:

These are the models that we believe are the most user friendly, suitable for long-term usage and contain all the required features to maintain the perfect temperature for your pool. These models are pretty affordable compared to their effectiveness. Paired with our tips for maintenance of the gas pool heater, we ensure you that these models can stay with you for a long period of time, even longer than advertised if you use them with caution. 

Do you find the above information helpful? Comment down below if you have any recommendation or any experience you have with gas pool heaters you would like to share.

  • Don't forget to share your thoughts about best gas pool heater at the comment box below!

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