10 Best Immersion Heater For Pool 2025 in the United States

The Raypak Crosswind Electric Heat/Cool Pool Heat Pump is designed to both heat and cool pools, offering flexibility for year-round use. With a power output of 45,000 BTU and operating on 208/230 volts, it suits medium to large pools. One standout feature is its inverter compressor paired with a low-speed fan motor, which helps keep operation whisper quiet—great if you want a peaceful poolside environment.

The spiral titanium heat exchanger is a durable choice, as titanium resists corrosion better than many other materials, increasing the unit's lifespan especially in pools with varying water chemistry. The heat pump includes an LCD digital display for straightforward temperature control, making it easy to set and monitor your desired water temperature. Installation and maintenance are typical for heat pumps of this size—given its weight (135 pounds) and size, professional installation is recommended to ensure proper setup and performance.

Customers rate it well for efficiency and quiet operation, though with a limited number of reviews. This model fits well as a reliable, quiet, and versatile heating and cooling solution for your pool, especially if you value corrosion resistance and digital controls. Professional installation is advisable.

The FibroPool Swimming Pool Heat Pump FH285-i is a high-efficiency, all-electric heater designed for both above and in-ground pools. With a power output of 85,000 BTU, it effectively warms pools up to 17,500 gallons for in-ground and up to 27-foot round or 18 by 33-foot oval for above-ground pools. Utilizing next-generation full inverter technology, it operates efficiently even at lower temperatures, reducing electricity usage and costs.

The heat pump is environmentally friendly, relying on clean electricity instead of natural gas or propane, making it a green choice for pool heating needs. Its rugged, weather-resistant design ensures durability and longevity, with a compact profile that offers flexible mounting options. Installation is straightforward with included fittings, and the digital control panel with Wi-Fi and app integration allows for easy temperature adjustments and monitoring from your phone.

It is best suited for humid climates and may not perform as well in dry climates below 55 degrees. Weighing 175 pounds and with dimensions of 28 x 26 x 37 inches, it is relatively heavy, which may be a consideration for installation and maintenance. The FibroPool FH285-i offers a blend of efficiency, ease of use, and environmental benefits, making it a solid choice for pool owners looking to extend their swimming season without a significant increase in energy costs.

The FibroPool FH255 Swimming Pool Heat Pump is a high-efficiency heater designed for both above-ground and in-ground pools. One of its major strengths is its use of clean electricity, which is a greener and often cheaper alternative to traditional heaters that use natural gas or propane. This makes it an environmentally friendly option that also helps save on energy bills. Its high-pressure differential compressors and titanium heat exchangers further bolster this efficiency, ensuring you get the most out of your energy consumption while enjoying extended swimming seasons.

The unit's rugged design, featuring an enamel-coated steel chassis, ensures durability and weather resistance, making it a reliable choice for outdoor use. The digital control panel is user-friendly, allowing easy temperature adjustments and monitoring, with the option to install an extension cable for added convenience.

However, there are some limitations. The heat pump is most effective in humid climates with temperatures down to 50 degrees. If you live in a dry climate, a traditional gas heater might be more suitable. Additionally, the unit's weight of nearly 150 pounds might make installation a bit challenging, although the included compression fittings do simplify the process somewhat. Despite these drawbacks, the FH255 remains a reliable product with solid performance.