10 Best Immersion Heater For Pool 2025 in the United States

The FibroPool FH135 Swimming Pool Heat Pump is a high-efficiency, electric heater designed for both above-ground and in-ground pools and spas. One of its standout features is its environmentally friendly design, as it runs on electricity and transfers heat from the air to the water, making it cost-effective and easy to maintain. This model is suitable for in-ground pools up to 7,500 gallons and above-ground pools up to 18-foot round or 12 by 24-foot oval, although it performs best in humid climates and may not be ideal for dry areas where traditional gas heaters might be better suited.

The heat pump is built for durability with an enamel-coated steel chassis that withstands outdoor conditions, and its slim profile offers flexible installation options. For user convenience, it includes a digital control panel that's easy to read and operate, with an optional extension cable for flexible placement. Despite its robust features, it weighs 98 pounds, which may require some effort during installation.

This heat pump is an excellent choice for those looking for an eco-friendly and efficient pool heating option, as long as they are in the right climate for optimal performance. However, its effectiveness might be limited in colder, dry climates, and it is best used in areas that stay above 50 degrees.

The ECOPOOLTECH Swimming Pool Heat Pump is designed for both above-ground and in-ground pools, suitable for pools with water capacities of up to 10,000 gallons. Its standout feature is the inverter technology, which allows the device to adjust its compressor speed automatically to maintain optimal energy efficiency, making it a cost-effective choice with its high COP score of 5.5. This means you can get up to 4.7 times more heat than the electricity it consumes, which is a big plus for those looking to save on energy costs.

In terms of power, it offers a maximum output of 38,864 BTU, ensuring efficient heating even in cooler climates where ambient temperatures are above 20°F. The pool heater operates on a voltage range of 208V to 230V with a frequency of 60Hz, which is standard for residential use, ensuring compatibility with most household electrical systems.

The automatic temperature control is another convenience, keeping your pool at the desired warmth without requiring constant adjustments. This feature, along with easy installation and low maintenance, makes it user-friendly, especially for those who might not be technically inclined. On the downside, the heater’s performance might be limited in regions where the temperature falls below 20°F, so it's essential to consider local climate conditions when choosing this product. Additionally, with a weight of 86 pounds and dimensions that may not be compact, installation might require extra assistance or space considerations.

For families or individuals looking to extend their swimming season without significant increases in electricity bills, this pool heater is a dependable choice. However, potential buyers should ensure it matches their climate requirements and check the space availability for installation.