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  • Heat your outdoor pool and enjoy swimming before summer even starts
Heat your outdoor pool and enjoy swimming before summer even starts

Heat your outdoor pool and enjoy swimming before summer even starts

Published on: 2025-05-09 Last edited on: 2025-05-22

Spring is a great time to open the pool season — but the water is still too cold? In this guide, you’ll find practical tips on how to efficiently heat even a frame pool in your backyard.

how to heat your outdoor pool in spring

Spring pool season: warm day, cold water

Even though the days are getting warmer, the pool water remains chilly. You may want to take a dip, but the cold drives you out. To start the season earlier, you need an effective heating solution.

1. Heat pumps – the best option for all pool sizes

heat pumps for outdoor pools

Heat pumps are suitable for both in-ground and above-ground pools — even medium-sized ones. They work efficiently even at lower air temperatures and help maintain a stable, comfortable water temperature all season long.

  • Very economical in the long run
  • Quiet operation and smart control (many models come with Wi-Fi)
  • Works even in +10 °C ambient temperature
  • Choose capacity based on pool volume

For example, a 5–7 kW heat pump is usually enough for a 20–25 m³ pool.

2. Electric heaters – fast, but costly

electric pool heater

Electric heaters quickly warm up a small pool, but if you plan to use them regularly, energy costs should be considered.

3. Heat exchangers – ideal if your home has a heating system

heat exchangers for pools

A heat exchanger connects to your home heating system (e.g., geothermal, wood-fired, etc.) and uses it to heat pool water. It’s especially suitable for larger in-ground pools where a separate circuit can be added.

  • Not suitable for frame pools
  • Requires technical setup
  • Highly effective if the system is well-balanced

4. Pool covers – heat retention and less maintenance

Pool covers – heat retention and less maintenance

A well-chosen cover helps retain heat and reduces debris entering the pool.

Floating cover

  • Flexible — can be cut to any shape
  • Helps reduce heat loss overnight
  • Somewhat protects from debris, but mostly aesthetic and convenient

Sliding enclosures

  • Best for larger or rectangular frame pools
  • Excellent heat retention
  • Less dirt and leaves in the water
  • Allows pool use even in cooler weather

5. Why solar heaters are not recommended in Europe

Although solar-powered pool heaters are available, they are not recommended in Europe. The climate simply doesn’t provide enough consistent sunlight to make them effective.

Moreover, they often damage the lawn — grass stops growing under them, can grow through the collector, and they tend to be unsightly and take up unnecessary space.

 

Quick overview: recommended outdoor pool heating and care

POOL TYPE RECOMMENDED HEATING
Small to medium frame pool Heat pump + floating cover
In-ground pool Heat pump or heat exchanger + sliding enclosure

Conclusion

Proper pool heating can extend your season by one or two months. With the right setup, even a frame pool can become a warm and cozy retreat by spring. The best overall solution is a heat pump. Additionally, using a pool cover helps retain heat overnight.

Curated by our team

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