10 Best Above Ground Pool Heaters 2025 in the United States

The Aquastrong 75,000 BTU Inverter Swimming Pool Heat Pump is a strong choice for above-ground pool owners who want to extend their swim season, thanks to its dual heating and cooling capabilities. It can heat pools up to 21,000 gallons, making it suitable for most medium to large above-ground pools. The powerful 75,000 BTU output means it can warm water quickly, even in cooler climates. One standout feature is its energy efficiency — it uses advanced inverter technology to save up to 70% energy compared to traditional electric heaters and runs quieter than many similar models, producing only about 53 dB of noise. This makes it less intrusive while operating.

The heater’s smart WiFi control lets you adjust settings and monitor energy use remotely, adding convenience for busy users. Installation is straightforward with multiple adapter options that fit common pool plumbing sizes, although the unit is quite heavy (218 pounds), which might require some help to position. It’s built with durable cast iron and includes an auto-defrost function that keeps it running smoothly through cold weather.

Since it requires a 220V power supply, you may need to check your home’s electrical setup before purchase. Despite being larger and heavier than some other models, its strong heating power, energy savings, and smart features make it an ideal option for pool owners seeking reliable, year-round temperature control with minimal hassle.

The Raypak 266,000 BTU Digital Electronic Ignition Natural Gas Pool Heater is a solid choice for those looking to efficiently heat their above-ground pool or spa. This heater is designed to withstand various weather conditions, making it a reliable option for outdoor use. With a substantial BTU output, it ensures quick and efficient heating, which is ideal for larger pools or spas.

The intermittent spark ignition pilot safety controls enhance safety by only activating the pilot when there is a need for heat, reducing unnecessary energy use and wear on the system. Additionally, the use of space-age materials means that the heater does not retain heat after it is turned off, allowing for installations without costly metal heat sinks. It is also equipped with a programmable thermostat, providing convenience and precise temperature control.

The unit has a significant weight of 210 pounds, which might make the installation process challenging without professional help. Furthermore, it is floor-mounted, which could limit placement options. The higher initial investment and the need for natural gas access might be a consideration for some users. This pool heater is well-suited for those seeking a durable, efficient, and relatively user-friendly heating solution for larger pools or spas, particularly in outdoor settings.

The TURBRO 50,000 BTU Swimming Pool Heat Pump offers a range of features that can enhance your swimming experience, particularly in cooler climates. One of its notable strengths is its inverter technology, which intelligently adjusts heating power to maintain a stable water temperature. This is complemented by its high energy efficiency, with a COP rating of up to 16.2, making it a cost-effective choice compared to natural gas or propane heaters.

Additionally, it is suitable for both in-ground and above-ground pools up to 16,000 gallons, and even larger pools up to 21,100 gallons, but not recommended for inflatable pools. The unit is also WiFi enabled, allowing remote control and monitoring via a smartphone app, which adds a layer of convenience. Safety features include multiple built-in sensors to monitor various operational parameters, ensuring safe use and preventing damage.

The TURBRO heat pump requires professional installation, which might be a drawback for some users. It's also most efficient when outdoor temperatures are above 60°F, so its performance may be less optimal in colder conditions. Another consideration is its size and weight, as it is quite large and heavy (146.3 pounds and dimensions of 25.9 x 15.7 x 38.5 inches), which might be cumbersome for some setups. Those looking for a simple plug-and-play solution might find this product less suitable. If you're in the market for a smart, energy-efficient pool heater and are prepared for the professional installation, the TURBRO Beluga series could be a great fit for your needs.