85% of pool owners choose natural gas pool heaters for their efficiency and reliability.
That’s why the Hayward W3H250FDN Universal H-Series leads the market with its 250,000 BTU output, ensuring quick heating for in-ground pools and spas.
Few know that its advanced technology not only improves heating efficiency but also minimizes energy consumption, making it a smart choice for eco-conscious users.
Our review covers the long-term value of these heaters compared to competitors like Pentair and MasterTemp.


Hayward 250,000 BTU Natural Gas Pool Heater
The adjustable valve sets the Hayward W3H250FDN Universal H-Series 250,000 BTU Natural Gas Pool and Spa Heater apart, allowing for precise temperature control tailored to individual preferences. Constructed with a durable cupro nickel heat exchanger, this heater is designed to resist corrosion and extend its lifespan, even in challenging water chemistry conditions. With dimensions of 28.5 x 16 x 24 inches, it fits seamlessly into most pool environments.
Key Advantages
- The industry-leading hydraulic design minimizes circulation pump run time, resulting in significant energy savings and enhanced efficiency.
Limitations
- Not compatible with propane systems, limiting its use to natural gas setups.
Best for outdoor enthusiasts needing a reliable and efficient heating solution for in-ground pools and spas, the Hayward W3H250FDN ensures comfort and convenience. Its front-panel-only access and intuitive control pad simplify operation, making maintenance a breeze. Additionally, its low NOx emissions comply with air quality standards, contributing to a lower environmental impact. Overall, this heater stands out for its performance and durability, making it an excellent choice for pool owners seeking long-term reliability.
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Pentair Natural Gas 125K Heater
The adjustable valve sets the Pentair EC-462024 Natural Gas 125K Heater apart from its competitors. This feature allows for precise temperature control, ensuring optimal heating efficiency tailored to your specific needs. Constructed from 316-grade stainless steel, this heater resists corrosion, making it suitable for long-term outdoor use. With dimensions of 24 x 19 x 15 inches and a plumbing connection of 1-1/2 inches, it is designed for smaller bodies of water, including aboveground pools, spas, and inground pools up to 15,000 gallons.
Key Advantages
- With an impressive 82% energy efficiency, this heater is among the highest in its class, helping to reduce operational costs.
Limitations
- Not compatible with propane systems, limiting its use to natural gas installations only.
Best for outdoor enthusiasts needing a reliable and efficient heating solution for their pools or spas, the Pentair EC-462024 offers high performance and user-friendly features. Its pre-mixed combustion technology ensures ultra-fast heat-up times, making it an excellent choice for those who want to enjoy their water features without long waits. Overall, this heater combines durability, efficiency, and ease of use, making it a top contender in its category.
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MasterTemp 400K BTU Natural Gas Heater
The adjustable valve sets the MasterTemp Pool Heater 400K BTU apart from its competitors. This natural gas pool heater is designed with a robust 316-grade stainless steel exterior, ensuring durability and resistance to corrosion, making it ideal for both outdoor and indoor installations. With dimensions of 30 x 30 x 20 inches, it offers a compact yet powerful heating solution for pool owners.
Key Advantages
- The premix combustion technology allows for rapid heating, providing efficient warm-ups that save time and energy.
- Built-in safety features protect the system from overheating and other potential hazards, ensuring reliable operation.
- The rotatable, easy-to-use controls enhance user experience, allowing for intuitive adjustments to the heating settings.
Limitations
- Not compatible with propane systems, limiting its use to natural gas installations only.
- Requires a professional installation, which may add to the overall cost.
Best for outdoor enthusiasts needing a powerful and efficient heating solution for their pools, the MasterTemp Pool Heater 400K BTU stands out with its advanced technology and durable construction, making it a top choice for those looking to enjoy their pool year-round.
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Raypak 206,000 BTU Gas Pool Heater
The adjustable valve sets the Raypak 206,000 BTU Digital Electronic Ignition Natural Gas Pool Heater apart from its competitors. This feature allows for precise control over the heating output, ensuring optimal performance tailored to your pool’s needs. Constructed from space-age materials, the heater is designed to resist corrosion, enhancing its longevity in various weather conditions. The unit measures 28.5 x 22.5 x 36 inches, making it a compact solution for any pool setup.
Key Advantages
- Intermittent spark ignition enhances safety by activating the pilot only when there is a demand for heat, reducing unnecessary gas consumption.
- High efficiency and a small footprint make this heater ideal for those looking to maximize space while minimizing energy costs.
Limitations
- Not compatible with propane systems, limiting its use to natural gas installations only.
Best for outdoor enthusiasts needing a reliable and efficient heating solution for their pools, the Raypak heater delivers performance without the burden of excess heat retention. Its advanced features and durable construction make it a top choice for pool owners seeking convenience and durability.
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Raypak 105,000 BTU Natural Gas Heater
The adjustable valve sets the Raypak 105,000 BTU Swimming Pool and Spa Heater apart, allowing users to fine-tune gas flow for optimal heating efficiency. Constructed from 316-grade stainless steel, this heater resists corrosion, ensuring durability in outdoor environments. With dimensions of 27.5″ H x 12″ W x 24″ D, it is compact yet powerful, making it suitable for above-ground pools, smaller in-ground pools, and spas. The unit features a standard 120v 3-prong power cord, with the option for easy conversion to 220v, enhancing its versatility.
Key Advantages
- The simple analog thermostat dial provides accurate temperature settings, allowing for precise control over your pool or spa environment.
- Its fully serviceable design ensures that maintenance is straightforward, extending the heater’s lifespan and performance.
Limitations
- Not compatible with propane systems, which may limit options for users not utilizing natural gas.
Best for outdoor enthusiasts needing a reliable and efficient heating solution for their pools and spas, the Raypak heater is an excellent choice for those prioritizing longevity and performance in their outdoor setups.
To buy this product, click here.
Faq about Natural Gas Pool Heater:
1: What is a natural gas pool heater?
A natural gas pool heater uses natural gas to heat water in swimming pools, providing a consistent and efficient heating solution.
2: How does a natural gas pool heater work?
It works by burning natural gas to heat water, which is then circulated through the pool via a pump and filter system.
3: What are the benefits of using a natural gas pool heater?
Benefits include faster heating times, cost-effectiveness, and the ability to maintain a comfortable water temperature year-round.
4: Are natural gas pool heaters energy efficient?
Yes, they are generally energy efficient, especially compared to electric heaters, due to lower fuel costs and quicker heating capabilities.
5: How much does it cost to run a natural gas pool heater?
The cost varies based on local gas prices, heater efficiency, and usage, but they typically have lower operational costs than electric heaters.
6: Can I install a natural gas pool heater myself?
It is recommended to hire a professional for installation to ensure safety and compliance with local codes and regulations.
7: How long do natural gas pool heaters last?
With proper maintenance, a natural gas pool heater can last 5 to 15 years, depending on the model and usage conditions.
Conclusion
The Hayward 250,000 BTU Natural Gas Pool Heater exemplifies efficiency and robust performance, ensuring optimal heating for larger pools with its impressive output. Its reliability and user-friendly features make it a preferred choice for pool enthusiasts seeking consistent warmth.
Conversely, the Pentair Natural Gas 125K Heater caters to smaller pools with its compact design and efficient heating capabilities. This model combines innovative technology with ease of use, appealing to those who prioritize space and functionality without compromising on performance.





