What Size Swimming Pool Heat Pump Do I Need?
Choosing the correct swimming pool heat pump is one of the most important factors in achieving efficient pool heating and economical running costs. A heat pump that is too small may struggle to maintain your desired swimming temperature, while an oversized unit may increase installation costs unnecessarily.
Factors That Affect Heat Pump Sizing
The correct heat pump size depends on several factors:
- Pool length and width
- Average water depth
- Total water volume
- Indoor or outdoor location
- Use of a swimming pool cover
- Desired swimming temperature
- Length of swimming season
- Geographical location
Every pool is different, which is why professional sizing advice is recommended before purchasing a heat pump.
Indoor vs Outdoor Pools
Outdoor pools generally require larger heat pumps than indoor pools because they lose more heat through wind, evaporation and changing weather conditions.
Indoor pools are usually easier and more economical to heat because heat loss is significantly reduced.
Why Pool Covers Are So Important
A swimming pool cover can dramatically reduce heat loss through evaporation. Using a cover not only lowers heating costs but can also reduce the size of heat pump required.
For maximum energy efficiency, we strongly recommend using a suitable pool cover whenever the pool is not in use.
Please check out our Solar Cover and Retention Cover section
Typical Swimming Pool Heat Pump Sizes
Small Domestic Pools
Smaller pools and plunge pools often require heat pumps in the 9kW to 13kW range depending on use and location.
Medium Domestic Pools
Most domestic swimming pools require heat pumps between 12kW and 20kW.
Large Domestic and Commercial Pools
Larger pools, hydrotherapy pools, hotel pools and commercial facilities may require larger heat pumps or multiple units operating together.
Why Choose an Inverter Heat Pump?
Modern inverter heat pumps automatically adjust their output to match heating demand.
Benefits include:
- Lower running costs
- Higher efficiency
- Quieter operation
- Faster heat recovery
- More stable water temperatures
This makes inverter heat pumps the preferred choice for most modern swimming pools.
Need Help Choosing the Right Heat Pump?
At Dolphin Leisure, we supply swimming pool heat pumps from leading manufacturers including Dantherm, Calorex, Waterco, Heatseeker and IPAC.
If you are unsure which heat pump is right for your pool, contact our team with:
- Pool length
- Pool width
- Average depth
- Indoor or outdoor location
- Whether a pool cover is used
- Desired swimming season
We'll be happy to recommend the most suitable swimming pool heat pump for your requirements.
Browse Our Range of Swimming Pool Heat Pumps
Visit our Swimming Pool Heat Pumps section to view our full range of domestic and commercial heat pumps from leading manufacturers.