10 Best Immersion Heater For Pool 2025 in the United States

The FibroPool Swimming Pool Heat Pump FH270 offers impressive power with a 70,000 BTU output, making it suitable for both above-ground and in-ground pools and spas. It operates on a 240-volt circuit, ensuring robust performance and efficiency. The use of clean electricity to power this heater is environmentally friendly and cost-effective, as it avoids the higher expenses associated with natural gas or propane heaters.

The high-pressure differential compressors and titanium heat exchangers contribute to its high efficiency, promising lower energy bills while maintaining optimal performance in humid climates down to 50 degrees. However, it's less effective in dry climates, where traditional gas heaters might be preferable. The enamel-coated steel chassis adds durability, designed to withstand outdoor elements across seasons.

Installation is user-friendly with the included 1 1/2 inch compression fittings, although it requires a 240-volt circuit, which might need professional assistance. The digital control panel is straightforward, allowing easy temperature settings and monitoring, with an optional extension for flexible control placement. This heat pump is ideal for eco-conscious users seeking an efficient and durable heater for humid climates. The ease of operation and maintenance further enhances its appeal, though installation might require electrical expertise.

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 Dr Infrared Heater DR-650HP Full DC Inverter Heat Pump is a strong option for those with in-ground or above-ground pools up to 18,000 gallons. With a power output of 65,000 BTU and a voltage requirement of 208 - 230 Vac, this heat pump is energy-efficient, converting 3.39 kilowatts to a substantial amount of heat. The variable power setting, adjusting between 20% - 100%, ensures energy savings and tailored heating performance.

Its twin rotary compressor reduces vibration and noise, making it quieter and more durable, which is reinforced by its CSA and AHRI certifications. The built-in WiFi for remote control via an app is a convenient feature, though it may require some tech-savviness to set up initially. Safety is addressed with features like Soft-Start, which helps prolong the unit's life by reducing startup strain. However, at 137 pounds and dimensions of 37.8 x 16.5 x 25.9 inches, it might be bulky and require significant space for installation.

The USA-based customer support is a bonus, offering reliable assistance. Ideal for larger pool owners looking for a durable, energy-efficient heating solution with modern connectivity features, but be prepared for some upfront effort in setting up and installing the unit.