Best Swimming Pool Heaters of 2025

Bryan Hicks Avatar
Bryan Hicks
Last Updated: Jan 10, 2025

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Swimming pool heaters are a great way to extend the swimming season and enjoy your pool even during cooler weather. These heaters come in a variety of types, including gas, electric, and solar-powered options. Gas heaters are typically the most powerful and can heat up a pool quickly, while electric heaters are more energy-efficient and cost-effective in the long run. Solar-powered heaters are the most eco-friendly option, harnessing the power of the sun to heat the water. No matter which type you choose, a swimming pool heater is a worthwhile investment for any pool owner looking to maximize their swimming enjoyment.

At a Glance: Our Top Picks

Pentair EC462025 MasterTemp Natural Gas Pool and Spa Heater Cover #TOP 1
Pentair EC462025 MasterTemp Natural Gas Pool and Spa Heater
ftb score rating icon 9.8
Hayward Universal H-Series 150K BTU Natural Gas Pool Heater Cover #TOP 2
Hayward Universal H-Series 150K BTU Natural Gas Pool Heater
ftb score rating icon 9.7
Raypak 206,000 BTU Digital Electronic Ignition Natural Gas Pool Heater Cover #TOP 3
Raypak 206,000 BTU Digital Electronic Ignition Natural Gas Pool Heater
ftb score rating icon 9.5

Top 10 Swimming Pool Heaters

#TOP 1

Pentair EC462025 MasterTemp Natural Gas Pool and Spa Heater

EC-462024
almond
Pentair EC462025 MasterTemp Natural Gas Pool and Spa Heater Cover
Pentair EC-462024 -Natural Gas 125K Heater - Limited Warranty

The Pentair EC462025 MasterTemp Natural Gas Pool and Spa Heater is a compact and efficient heater designed for smaller bodies of water up to 15,000 gallons. With 125,000 BTUs, this pool heater will keep your pool at the perfect temperature so you can always enjoy pool time. Thanks to its thoughtful, user-friendly design, this pool and spa heater is easy to operate and monitor. The rotating digital display allows for any installation rotation and is easy to read, while the user-friendly indicator lights allow for simple system operation and monitoring. Additionally, this swimming pool heater is equipped with safety features that prevent overheat, auto shut-off when the temperature exceeds factory limits, and manual shut-off for servicing. Certified for Low NOx emissions, this pool heater is a reliable and efficient choice for any pool owner.

What We Like
Compact and efficient design
User-friendly with safety features
Rotating digital display for easy reading
Quiet operation for peaceful leisure time
Certified for Low NOx emissions
#TOP 2

Hayward Universal H-Series 150K BTU Natural Gas Pool Heater

W3H150FDN
Hayward Universal H-Series 150K BTU Natural Gas Pool Heater Cover
Hayward W3H150FDN Universal H-Series 150,000 BTU Natural Gas Pool and Spa Heater for In-Ground Pools and Spas

The Hayward Universal H-Series 150,000 BTU Natural Gas Pool and Spa Heater is perfect for in-ground pools and spas up to 400 sq. ft. It offers fast premium heating performance, exceptional corrosion protection, and energy savings. Its low NOx emissions make it an excellent choice for areas where low-NOx emissions are required. The easy-to-use front control panel provides easy operation, service, and maintenance.

What We Like
Fast premium heating performance
Exceptional corrosion protection
Energy-efficient
Low NOx emissions
Easy-to-use front control panel
#TOP 3

Raypak 206,000 BTU Digital Electronic Ignition Natural Gas Pool Heater

P-R206A-EN-C
multi-colored
206,000 BTU
Raypak 206,000 BTU Digital Electronic Ignition Natural Gas Pool Heater Cover
Raypak 206,000 BTU Digital Electronic Ignition Natural Gas Pool Heater

Looking for a high-performance pool heater that offers convenience, efficiency, and versatility? Look no further than the Raypak 206,000 BTU Digital Electronic Ignition Natural Gas Pool Heater. With its intermittent spark ignition pilot safety controls, space-age material, and ability to withstand various weather conditions, this heater is designed to provide you with years of reliable use. Plus, it won't retain residual heat after it's turned off, so you won't need costly metal heat sinks. Whether you're heating a swimming pool or spa, this heater is the perfect solution.

What We Like
Electronic ignition and digital thermostat provide convenience and ease of use
Designed to withstand various weather conditions, making it a durable and reliable option
Exceeds federal and state fuel efficiency standards, helping you save money on energy costs

Pentair EC-462025 Heaters

EC-462025
White
Pentair EC-462025 Heaters Cover
Pentair EC462025 MasterTemp 125 125,000 BTU Compact Energy Efficient Swimming Pool and Spa Propane Gas Heater for Small Pools Up to 15,000 Gallons

Pentair Pool Heater is great for smaller pools up to 15,000 gallons, boasting 125,000 BTUs for efficient heating. Its compact design with 82% efficiency ensures quiet operation, not disturbing your leisure pool time. The rotating digital display allows for easy reading, while user-friendly indicator lights simplify system operation. Safety features like water pressure and stack flue sensor prevent overheating, ensuring a secure experience. With Low NOx emissions certification, this heater provides both convenience and safety for your pool.

What We Like
Efficient Heating
Compact Design
User-Friendly Features
Safety Certified

Varpoolfaye Electric Pool Heater 30000 BTU

Varpoolfaye
Varpoolfaye Electric Pool Heater 30000 BTU Cover
Varpoolfaye Electric Pool Heater for Inground Pool 30000 BTU Swimming Pool Heater Pump Above Ground Pool Heater 120V 8000 Gallon Heating or Cooling WiFi Control Schedule

The Varpoolfaye Pool Heater is designed for optimal heating and cooling of your swimming pool. With a powerful 30,000 BTU output, it effectively maintains a comfortable temperature for pools up to 8,000 gallons. You can enjoy all-season swimming, as it offers both heating and cooling modes, ranging from 46°F to 104°F for heating and 46°F to 82°F for cooling. Plus, its WiFi-enabled controls allow you to manage your pool's settings remotely, giving you the convenience to adjust temperatures from anywhere. Additionally, this energy-efficient heater operates quietly, ensuring a peaceful environment while you swim.

What We Like
High-performance heating
WiFi-enabled control
Energy-efficient operation
Quiet operation
#TOP 6

Hayward H-Series 135k BTU Heater

W3H135FDN
Beige
Hayward H-Series 135k BTU Heater Cover
Hayward W3H135FDN H-Series Pool/Spa Heater, 135k BTU, Natural Gas Model

The Hayward 135k Heater offers a reliable heating solution for your pool or spa. Its durable cupro nickel heat exchanger ensures long-lasting performance, allowing you to enjoy warm water for years to come. With its advanced hydraulic design, this heater heats your water quickly, so you can spend less time waiting and more time swimming. The electronic panel is user-friendly, making it easy for you to adjust settings without any hassle. Additionally, the heater features a unique water flow management system that optimizes efficiency, ensuring you get the best heating experience while being environmentally friendly with low NOx emissions.

What We Like
Durable heat exchanger
Fast heating capability
User-friendly electronic panel
Efficient water flow management
Low emissions
#TOP 7

EcoSmart SMART POOL 27 Electric Tankless Pool Heater

Smart POOL 27
Black
17 x 14 x 5.5
EcoSmart SMART POOL 27 Electric Tankless Pool Heater Cover
EcoSmart SMART POOL 27 Electric Tankless Pool Heater, 27kW, 240 Volt, 112.5 Amps with Self Modulating Technology

The EcoSmart SMART POOL 27 Electric Tankless Pool Heater is a reliable and long-lasting pool heating solution. It features flow activation technology that reduces the risk of burned elements, and a digital thermostat control that allows you to set the temperature to your desired level with ease. This compact and easy-to-install pool heater is compatible with an EcoSmart remote control, and can be used as an alternative or booster to heat pumps. With a wattage of 27,000, this pool heater is an efficient and effective way to keep your pool warm.

What We Like
Reliable and long-lasting
Easy-to-install
Compatible with EcoSmart remote control
Can be used as an alternative or booster to heat pumps
Efficient and effective
#TOP 8

FibroPool FH255 Heat Pump

FH255
Gray
FibroPool FH255 Heat Pump Cover
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

The FibroPool Heat Pump FH255 is an eco-friendly and cost-effective solution for heating your above or in-ground pool. By utilizing electricity instead of natural gas or propane, this heat pump helps you save money and reduces environmental impact. It is suitable for pools up to 10,000 gallons and offers high efficiency with its titanium heat exchangers. The rugged design ensures durability, and the easy operation with a digital control panel makes temperature setting convenient. Enjoy late-season swimming without worrying about high electric bills with the FibroPool Heat Pump.

What We Like
Eco-friendly
Cost-effective
High efficiency
#TOP 9

Hayward 400K BTU Propane Heater for In-Ground Pools and Spas

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

The Hayward Universal H-Series 400,000 BTU Propane Heater is designed for in-ground pools and spas up to 1,200 ft² and where natural gas is available. With low-NOx emissions, it is eco-friendly and energy-efficient, reducing circulation pump run time. The heater boasts exceptional protection against corrosion and unbalanced water chemistry, ensuring long-lasting durability. It features an intuitive front control panel for easy operation, maintenance, and service. Enjoy premium heating performance and reliable comfort for years with this efficient pool and spa heater.

What We Like
Premium heating performance for reliable, long-lasting comfort
Eco-friendly and energy-efficient with low-NOx emissions
Exceptional protection against corrosion and unbalanced water chemistry for durability
#TOP 10

Raypak PR106AENC Natural Gas Pool Heater

014779
Raypak PR106AENC Natural Gas Pool Heater Cover
Raypak 014779 PR106AENC 105000 BTU Natural Gas Pool Heater

The Raypak Gas Pool Heater is designed with polymer headers to prevent rust stains, an all-copper-fin-tube heat exchanger for efficient heating, and the ability to operate smoothly in various weather conditions. This heater doesn't need fans to handle drafting issues, ensuring uninterrupted heating. The polymer headers protect your pool or spa surface, while the copper heat exchanger delivers consistent heating performance. You can rely on this heater to work effectively even in challenging weather conditions, providing you with hassle-free heating for your pool or spa.

What We Like
Rust stain prevention
Efficient copper heat exchanger
Operates smoothly in all weather
Buying Guide Image

All You Need to Know About Buying Swimming Pool Heaters

Introduction

Swimming pool heaters are an essential piece of equipment for any pool owner who wants to extend their swimming season and enjoy the benefits of a warm and comfortable pool. With so many different models and types of heaters available on the market, choosing the right one can be a daunting task. In this article, we will provide some tips and guidelines to help you make an informed decision and find the best swimming pool heater for your needs.

Considerations

Before making a decision, there are a few key factors to consider when choosing a swimming pool heater. These include the size of your pool, the climate in which you live, your budget, and the type of fuel source you want to use.

Pool Size

One of the most important factors to consider when choosing a swimming pool heater is the size of your pool. Heaters are rated by their BTU (British Thermal Unit) output, which indicates how much heat they can produce. The larger your pool, the more BTUs you will need to adequately heat it. As a general rule of thumb, you will need approximately 50 BTUs per square foot of surface area for an inground pool, and 75 BTUs per square foot for an above ground pool.

Climate

The climate in which you live will also affect your choice of a swimming pool heater. In warmer climates, you may not need as much heating power, while in colder regions, a more powerful heater may be necessary.

Budget

Your budget is another important factor to consider when choosing a swimming pool heater. Heaters can range in price from a few hundred dollars to several thousand dollars, depending on their size and features. It's important to consider the long-term costs of operating the heater, as well as the initial purchase price, to ensure that you get the best value for your money.

Fuel Source

Finally, you will need to consider the type of fuel source you want to use for your swimming pool heater. The most common options are natural gas, propane, and electric. Each has its own advantages and disadvantages, so it's important to consider your specific needs and preferences when making a decision.

Types of Swimming Pool Heaters

Once you have considered the factors above, you can begin to look at the different types of swimming pool heaters available on the market. The two most common types are gas heaters and electric heaters.

Gas Heaters

Gas heaters are the most popular type of swimming pool heater, and they are typically more powerful and efficient than electric heaters. They use natural gas or propane as a fuel source, and they can heat a pool quickly and effectively. However, gas heaters can be more expensive to operate than electric heaters, and they require regular maintenance and upkeep.

Electric Heaters

Electric heaters are a less expensive option, and they are relatively easy to install and operate. They use electricity as a fuel source, and they are typically less powerful than gas heaters. As a result, they may not be able to heat a large pool as quickly or effectively. However, they are a good choice for smaller pools, and they are generally more cost-effective to operate.

Conclusion

Choosing the right swimming pool heater can be a challenging task, but it is an important decision that will affect the enjoyment and longevity of your pool. By considering the factors discussed above, you can make an informed decision and find the best heater for your needs. With the right heater, you can extend your swimming season and enjoy the comfort and relaxation of a warm pool.

Frequently Asked Questions (FAQs)

1. What is the most efficient type of pool heater?

Heat pump pool heaters are considered the most efficient type of pool heater. While they may have a higher upfront cost compared to gas pool heaters, they have much lower annual operating costs due to their higher efficiencies. With proper maintenance, heat pump pool heaters also tend to last longer.

2. What is the cheapest way to heat a pool?

The cheapest way to heat a pool includes using solar heating as the primary source, utilizing a heat pump during the warmest time of the day, using pool blankets to control evaporation, and shielding the pool from wind. These measures can help reduce heating costs and make pool heating more affordable.

3. What is the best way to heat a swimming pool?

Boilers are commonly used to heat swimming pools. They can heat the water by passing it through the boiler or by using an external heat exchanger. Commercial boilers can be powered by natural or propane gas and can be installed outdoors or indoors.

4. Is it worth getting a pool heater?

Having a pool heater is beneficial if you want to use your pool year-round. While it may not be necessary in areas with cold winters, having a pool heater allows you to enjoy swimming even during colder months. However, the necessity and benefits of a pool heater may vary depending on your location and climate.

5. What are the cons of a pool heater?

Gas pool heating systems have a few drawbacks. They can add to your utility bill due to the fuel they require, and they are only efficient when used for short periods of time. Additionally, gas pool heaters produce emissions and are not considered environmentally friendly.

6. Does a pool heater use a lot of electricity?

The electricity usage of a pool heat pump is approximately 5 kilowatts per hour per 100,000 BTU. For a general 100,000 BTU pool heat pump, you can expect to use around 5,000 Watts per hour. The actual electricity usage may vary, but it's important to consider the power consumption when operating a pool heater.

7. Is it cheaper to heat a pool with gas or electric?

Electric swimming pool heaters are generally cheaper to operate in the long run compared to gas heaters. While electric heaters may have higher upfront costs and installation expenses, the overall cost of using electric heaters tends to be lower over time.

8. What temperature do you keep a heated pool at?

To keep the majority of swimmers comfortable, set your pool heater's thermostat to a temperature between 78°F and 82°F (26°C and 28°C). Adjust the temperature slightly depending on your climate, with slightly cooler temperatures in hot summers and slightly warmer temperatures in milder climates.

9. Is it cheaper to heat a pool or keep it warm?

Heating a pool to a higher temperature will cost more. Each degree rise in temperature can result in a 15-18% increase in operation cost. While a pool at 88°F may be comfortable, maintaining a pool at 85°F will be more cost-effective in terms of heating expenses.

10. How many hours a day should a pool heater run?

The time required to heat a pool depends on factors such as the volume of water, desired temperature increase, and the size of the heater. On average, it may take around 6 hours for a standard heater (300k BTU) to heat a rectangular pool (16x36) by 10 degrees. It's important to consider these factors when determining the operating hours for your pool heater.

Editor's Notes

During our swimming pool heater research, we found 24 swimming pool heater products and shortlisted 10 quality products. We collected and analyzed 6,085 customer reviews through our big data system to write the swimming pool heaters list. We found that most customers choose swimming pool heaters with an average price of $1,688.49.

The swimming pool heaters are available for purchase. We have researched hundreds of brands and picked the top brands of swimming pool heaters, including Pentair, Hayward, Raypak, Varpoolfaye, Ecosmart US. The seller of top 1 product has received honest feedback from 698 consumers with an average rating of 4.5.

Written by
Bryan Hicks Avatar

Bryan Hicks is a professional gardener and a writer who lives in North Texas with his family and his dog. Bryan has spent more than half of his life surrounded by garden products. He has extensive experience in garden makeovers and maintenance and lawn care. His areas of expertise include outdoor decoration, gardening and garden design.