Swimming Pool Heat Pumps and Their Benefits

May 16, 2023 | News

pool heat pump benefits

As a pool owner, you might be constantly seeking efficient and cost-effective ways to heat your swimming pool. With numerous options available such as boilers, in-line heaters, solar panels, and wood burners, it is important to understand the benefits of each method. Among these, air source heat pumps have emerged as a popular, environmentally friendly, and cost-effective solution. This comprehensive guide will address common questions and provide insights into the workings, benefits, and best practices for heat pump usage.

Understanding Heat Pumps and Their Installation

Heat pumps work by absorbing heat from the air and transferring it to your pool water. For each kilowatt (kW) of energy consumed, a heat pump can transfer up to 6 kW of heat to your pool, making them up to 80% cheaper to run and more environmentally friendly than traditional heating methods. Key factors to consider while installing a heat pump include location, clearance distances, sunlight exposure, size, electrical connections, and compatibility with existing pool equipment.

Efficiency and Cost Savings with Heat Pumps

Heat pumps are rated based on their coefficient of performance (COP), which measures the ratio of heating output to electrical energy consumed. A higher COP means greater efficiency and lower operating costs. As heat pumps extract heat from the surrounding air, they are more efficient when air temperatures are higher, which subsequently results in higher pool water temperatures. Surprisingly, larger heat pumps do not necessarily cost more to run. They have higher power input but can heat the water in a shorter period, allowing you to heat the pool during the warmest part of the day for maximum efficiency.

 Year-Round Pool Heating: Is It Possible?

Heat pumps are most efficient at ambient air temperatures above 15°C. While some models are designed for summer use only, others are built for extended or all-season use, featuring defrost functions and the ability to operate at lower temperatures. However, as air temperatures drop, heat pumps’ capacity to heat the pool decreases, and heat loss increases. To achieve optimal heating during colder months, consider investing in a larger heat pump and maintaining proper pool insulation.

Proper Heat Pump Installation and Maintenance

To ensure efficient operation, heat pumps should be installed outside, on a solid base, and away from walls, fences, and dense vegetation to facilitate proper air circulation. Most heat pumps are built for durability and quiet operation, with noise levels ranging from 50dB to 60dB. A bypass kit is recommended for controlling flow rate, winterizing, and maintaining your heat pump without disrupting the filtration circuit.

Inverter Technology: A Game Changer in Heat Pumps

Inverter heat pumps utilize variable-speed compressor motors, allowing them to reach and maintain desired temperatures more quickly and efficiently. Inverter technology offers up to 30% more energy efficiency and quieter operation compared to fixed-speed motors. With a COP of up to 13, inverter heat pumps can transfer up to 13 kW of heat to your pool for each kW of energy consumed.

Inverter heat pumps also employ a soft-start mechanism, which gradually increases the current from 0 A to the rated current, reducing the power wastage associated with on/off heat pumps that start with higher currents.

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Selecting the Right Heat Pump for Your Pool

Choosing the right heat pump for your pool requires careful consideration of factors such as pool size, usage patterns, desired temperature, existing equipment, pipework, and equipment location. Consulting with an expert can help you make an informed decision tailored to your specific needs. Many pool owners opt for larger heat pumps than what their pool size suggests, as it offers additional heating capacity, extended swimming seasons, and increased water temperature. While the initial investment may be higher, the long-term benefits and cost savings often outweigh the additional cost.


Heat pumps have become a popular choice among pool owners for their energy efficiency, cost-effectiveness, and eco-friendliness. By understanding the principles behind their operation, installation requirements, and benefits, you can make an informed decision on the right heat pump for your pool. Inverter technology further enhances the advantages of heat pumps, making them an even more attractive option for pool heating. Ultimately, selecting the right heat pump and following proper installation and maintenance practices will result in years of reliable service, improved comfort, and reduced energy costs, allowing you to enjoy your swimming pool to the fullest.

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