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How to Heat a Pool – Which Heater is Right for My Pool? 
Depending on the type of pool, a different heating method may be suitable (Photo: nata777_7 - stock.adobe.com)

How to Heat a Pool – Which Heater is Right for My Pool? 

Read about how to heat a pool in this article.

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Heat Your Swimming Pool Effectively

Thinking about getting a pool and wondering how to keep it warm? Or do you already have one and need an alternative or temporary heating solution? We´ve got the answers on how to heat your swimming pool effectively.

Choosing the Right Pool Heater – It´s All About the Intended Use

Heating a pool can be complex and costly if you choose the wring method. But with the right heater, you can comfortably extend your swimming season beyond summer. We´ll explain your options for both long-term and short-term heating, and what to do if your heating system fails.

What´s the Best Way to Heat a Pool?

When it comes to heating your swimming pool, you have several options. The best method depends on your specific circumstances and how long you plan to use the heater.

1. For Private or Commercial Use: Pool Cover

Simply using a pool cover, whether manual or automatic, can help retain heat for longer. A dark cover is especially effective as it absorbs sunlight and transfers the warmth to the water. Pool covers can also be used alongside other heating methods to make the process more efficient.

2. Heating Private Pools – Short-Term Use and Pools up to 15 m3: Immersion Heaters/Electric Pool Heaters

If you need to heat your pool occasionally, like at a vacation home, an electric heater is a good choice. These heaters are easily to connect to your power supply. However, due to their high energy consumption, they aren´t ideal for long-term or regular use.

3. Heating Private Pools – Long-Term Use and Pools up to 80 m3: Solar Heating

Once installed, solar technology provides pool heat at no ongoing cost. If you have plenty of space, you can use solar mats or covers. Solar collectors, such as those installed on your roof, are also a great option. The collector setup should cover at least 25% of the pool´s surface area, but more is better to ensure you´re not too dependent on the weather. Keep in mind that larger pools will require more expensive and complex solar setups. Even with a large number of collectors, you´re never entirely weather-independent; prolonged cloudy weather or long nights outside of summer can limit your heat supply. Combining solar with a heat pump can be a smart solution.

4. For Regular Use in Private or Commercial Settings: Heat Pumps

Techniker installiert neue Wärmepumpe für den Swimming Pool
Tomasz Zajda – stock.adobe.com
Heat pumps, which run on electricity, harness ambient air to heat your pool and are especially efficient for long-term use.

Commercial Pool heating

If you operate a commercial pool or swimming facility, you might need a heating system that works independently of weather conditions. In these cases, a permanently installed system is often the best choice. Here´s how to heat a commercial pool:

1. Regular Commercial Use: Heat Exchangers

You can use your building´s existing heating system to heat your pool or swimming facility by installing a heat exchanger. This device transfers thermal energy to the pool water. It can work with traditional boilers or in combination with heat pumps. As long as the building´s heating is running, the pool can be heated simultaneously. During summer, heating the pool via a heat exchanger is efficient when combined with a heat pump or solar collectors.

2. For Temporary Commercial Use, When No Permanent Heating or Heat Exchanger Is Available – For Pools Up to 2,000 m3: Mobile Boilers

If your pool´s heating system or heat exchanger is down, a mobile heating system can step in. A mobile boiler, with or without a heat exchanger, can be connected to your existing setup. Mobile pools for events can also be heated using a temporary system. In such cases, a mobile heater, heat exchanger, and pump are hooked up to the pool.

Reliable Heat Supply

Mobile Wärme 24 has heated various outdoor pools, including Europe´s larges mobile outdoor pool at the Airbeat One Festival. Mobile heating systems are particularly useful for large events to ensure a continuous heat supply.

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Conclusion: Which Heater for Which Pool?

Heating Method
Private
Commercial
Size Limitation?
Cover
Yes
Yes
No
Immersion Heaters/Electric Pool Heaters
Yes
No
Up to 15 m3*
Solar Heating
Yes
Not recommended
Up to 80 m3
Heat Pump
Yes
Yes
No
Heat Exchanger
Not recommended
Yes
No
Mobile Boiler
No
Yes
Nein

*These are recommended values. Depending on your setup, you might also be able to use them for larger pools, but it could be less efficient or more costly.

Is Heating Pools Allowed?

Yes. A temporary energy-saving regulation was in place from September 1, 2022, to April 2023 due to gas shortages and rising energy prices, which prohibited heating private pools with electricity or gas from the public grid. Commercial pool operators or those using solar heating were not affected by this regulation. The ban has since been lifted for everyone.

Learn more about pool heating here.

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