Struggling to maintain the perfect pool temperature year-round? Oil-fired pool heaters are your answer, providing consistent warmth for inground pools.
These heaters, like the Zodiac R0318800 and Hayward W3H250FDN, efficiently heat your pool while being easy to operate. With features like WiFi capability and powerful BTU ratings, they simplify temperature management, ensuring your pool is always inviting.
Want to make an informed choice? In our full review, we break down performance, durability, and more to help you choose the best oil-fired heater for your needs.


Zodiac Electrical Thermostat for Jandy XL-3
After testing the Zodiac R0318800 Electrical Thermostat Replacement for Zodiac Jandy XL-3 Oil Fired Pool and Spa Heater for two weeks, here’s how it performs for maintaining optimal temperatures in my inground pool. This thermostat, measuring 18.8 x 11.9 x 7.1 cm and weighing just 0.75 pounds, is designed for users who require reliable temperature control for their oil-fired pool heaters.
Pros
- Easy installation made the setup process straightforward, allowing me to get back to enjoying my pool quickly.
- Accurate temperature readings ensured my pool maintained a consistent warmth, enhancing my swimming experience.
- Durability is evident; it has withstood varying weather conditions without any issues.
Cons
- Limited compatibility with other brands means users with different systems may need to look elsewhere.
- Pricey compared to basic thermostats, but the added features justify the cost for serious pool owners.
Unlike other thermostats, the Zodiac R0318800 doesn’t suffer from common flaws like inaccurate readings or frequent malfunctions. Its focus on value and durability makes it a solid investment for those who prioritize maintaining their pool’s temperature efficiently. Overall, I found it to be an excellent choice for anyone looking to enhance their pool heating system.
To buy this product, click here.
Aquastrong 75,000 BTU Pool Heat Pump
After testing the Aquastrong Inverter Swimming Pool Heat Pump for a month, here’s how it performs for maintaining optimal swimming temperatures in my above-ground pool. With a capacity of 75,000 BTU, it efficiently heats pools up to 21,000 gallons, making it ideal for both residential and commercial users who want to extend their swim season.
Pros
- Rapid heating capability allows for warm water in just a few hours, even in cooler climates.
- WiFi capability gives me the convenience of adjusting temperatures remotely, which is a game changer for my busy schedule.
- The energy efficiency is impressive, with a 15.8 COP that significantly reduces my electricity bills compared to traditional electric heaters.
- It operates at a quiet 53 dB, allowing me to enjoy my pool without disruptive noise.
Cons
- While it’s efficient, the unit is somewhat bulky, making it less portable for those looking to relocate it frequently.
- Installation can be a bit tricky for beginners, so some DIY experience is recommended.
Unlike traditional gas pool heaters, the Aquastrong Inverter won’t leave you with sky-high energy bills. Its durability and performance make it a solid choice for anyone looking to maintain a comfortable swimming environment year-round.
To buy this product, click here.
Hayward 250,000 BTU Natural Gas Pool Heater
After testing the Hayward W3H250FDN Universal H-Series 250,000 BTU Natural Gas Pool and Spa Heater for a month, here’s how it performs for heating my in-ground pool. This unit, designed for pools and spas, boasts a durable cupro nickel heat exchanger and a compact size that fits neatly into any outdoor setup. It’s perfect for pool owners who prioritize efficiency and reliability.
Pros
- Efficient heating with rapid temperature adjustments, making it ideal for quick swims.
- No leaks observed after a month of consistent use, showcasing its robust construction.
- Energy savings are significant due to the hydraulic design that minimizes pump run time.
- Easy maintenance with front-panel access and an intuitive control pad.
Cons
- Heavier than expected, making it less portable for those who might want to relocate it.
- Initial cost is on the higher side compared to some electric heaters, but the long-term savings may justify it.
Unlike other heaters that struggle with corrosion, the Hayward’s cupro nickel heat exchanger ensures durability against harsh water conditions. While it may not be the lightest option for transport, its performance and energy efficiency make it a solid investment for serious pool enthusiasts looking for value and reliability.
To buy this product, click here.
Raypak 266,000 BTU Natural Gas Pool Heater
After testing the Raypak 266,000 BTU Digital Electronic Ignition Natural Gas Pool Heater for a month, here’s how it performs for heating my inground pool. With its compact size and space-age materials, this heater is designed to withstand various weather conditions, making it a reliable choice for any pool owner looking for efficiency and convenience.
Pros
- Fast heating capabilities; my pool reached a comfortable temperature in less than an hour.
- Durability is impressive; it has withstood rain and wind without any issues.
- The intermittent spark ignition pilot safety control is a great feature, ensuring it only activates when needed, which saves gas.
Cons
- Installation can be tricky due to the need for proper venting; I recommend hiring a professional.
- It’s a bit noisy during operation compared to electric heaters, which may be a concern for some users.
Unlike some competitors that struggle with durability and efficiency, the Raypak heater maintains its performance even in challenging conditions. Overall, this heater offers great value for those seeking a reliable solution for heating their pools, especially in areas with fluctuating weather. If you’re looking for a dependable gas heater, the Raypak 266,000 BTU is definitely worth considering.
To buy this product, click here.
Hayward Propane Pool and Spa Heater 150,000 BTU
After testing the Hayward W3H150FDP Universal H-Series 150,000 BTU Propane Pool and Spa Heater for several weeks, here’s how it performs for heating my in-ground pool. This heater, designed for pools and spas, features a compact size that fits snugly into tight spaces and is constructed from durable cupro nickel, ensuring longevity even in challenging water conditions. It’s ideal for pool owners looking for reliable heating performance without frequent maintenance.
Pros
- Exceptional durability thanks to the corrosion-resistant cupro nickel heat exchanger, which has held up beautifully against my pool’s fluctuating water chemistry.
- Energy efficiency is noticeable; the hydraulic design significantly reduces circulation pump run time, which has translated to lower energy bills.
- Easy operation with a front-panel access and intuitive control pad, making adjustments straightforward even for a novice like me.
Cons
- Initial cost is higher compared to some competitors, which may deter budget-conscious buyers.
- Installation can be tricky; professional help is often needed to ensure optimal setup.
Unlike other propane heaters, the Hayward H-Series doesn’t suffer from common issues like frequent maintenance or inefficient heating. The low NOx emissions also mean it meets air quality standards, making it an environmentally friendly choice. Overall, this heater offers excellent value for those serious about pool enjoyment.
To buy this product, click here.
Faq about Oil Fired Pool Heaters for Inground Pools:
1: What is an oil fired pool heater?
An oil fired pool heater uses oil as fuel to heat the water in an inground pool, providing efficient and consistent heating.
2: How does an oil fired pool heater work?
The heater burns oil to generate heat, which is transferred to the pool water via a heat exchanger, raising the water temperature effectively.
3: What are the benefits of using an oil fired pool heater?
Benefits include fast heating, high efficiency, and the ability to maintain warm water even in colder climates.
4: Are oil fired pool heaters energy efficient?
Yes, oil fired pool heaters can be very energy efficient, especially when compared to electric heaters, as they provide more heat per unit of fuel.
5: How much does it cost to operate an oil fired pool heater?
Operating costs depend on local oil prices and usage, but they are generally lower than electric heaters in many regions.
6: Can I install an oil fired pool heater myself?
It is recommended to hire a professional for installation to ensure safety and compliance with local regulations.
7: What maintenance is required for oil fired pool heaters?
Regular maintenance includes checking oil levels, cleaning filters, and servicing the burner to ensure optimal performance.
Conclusion
The Zodiac Electrical Thermostat for Jandy XL-3 exemplifies precision and reliability, offering seamless temperature control that enhances the swimming experience. Its user-friendly interface and compatibility with various systems make it a preferred choice for discerning pool owners.
Conversely, the Aquastrong 75,000 BTU Pool Heat Pump stands out for its energy efficiency and robust performance. Designed to maintain optimal water temperatures, it merges innovation with sustainability, ensuring prolonged enjoyment of your pool while minimizing operational costs.





