A pool heat pump has to be sized according to water volume, target temperature, the season, whether the pool is covered, and local conditions. A COP figure without the stated air and water temperatures can be misleading. Ask any offer for realistic sizing and an explanation of noise levels.
- For what air and water temperature is the stated output valid?
- What is the noise level in normal and night mode?
- Is the pool covered, and how much does that reduce losses?
- Where will the unit sit in terms of airflow and neighbours?
Where the outdoor unit sits affects not only the airflow it needs to run efficiently, but also relations with neighbours — noise travels differently in a densely built garden than on an open plot. On smaller plots, consider a quieter model even at the cost of lower output, compensated by a longer heating time. Covering the pool at night reduces heat loss and shortens how long the pump needs to run.
Before ordering, also check how the pump performs at low outdoor temperatures at the start and end of the season, when the gap between air and water temperature is largest. A good model should keep reasonable efficiency in those conditions too, not just during the warm summer months.
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