A swimming pool heat pump will only operate efficiently if the ambient air temperature is over 15 degrees Celsius. A summer season heat pump won’t operate if the temperature falls below 8 – 10 degrees Celsius.
An extended season pump will come with defrost functionality so it can operate in cold air temperatures, while an all-season pump is capable of operating in a temperature as low as -10 degrees Celsius. It’s important to note, though, that when the air temperature is lower, there is a reduced kilowatt output, so the pool may not reach the same temperature as it would in warm weather.
Every heat pump has its own balance point at which it can no longer heat the pool to a temperature suitable for swimming. A large heat pump will help you to reach higher water temperatures, or extend your pool’s usable season. This balance point can be impacted by a range of factors including pipework and insulation.
Therefore, in some cases, you may find that your pump cannot achieve the same maximum temperature that the manufacturer claims. It’s therefore important to arrange a regular swimming pool heat pump service to ensure that it is working as efficiently as possible at all times, and if a problem is identified, to arrange a swimming pool heat pump repair immediately to prevent the issue from getting out of hand.