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If the water in your swimming pool is too cold, then you probably will not swim in it. If you want to enjoy your pool not only on sunny days, then you are best advised to choose an efficient pool heating system.
Without heating, the pool water will not get any warmer than 22 °C, or perhaps 25 °C on very hot days. Sports swimmers like to swim in pool water that is at least 26 °C. Most pools are even heated to 29 or 30 °C.
Moreover, pool heating allows you to extend your swimming season. Without heating, you can only swim during the summer months, from the end of May until the end of August. With heating, you can easily swim for up to 4 months longer, from April until the end of October. With some systems, you can even swim the whole year round.
However, which type of heating or system should you choose? There is a wide choice and the ideal choice depends on numerous factors such as the type and size of the pool, the existing residential heating system, how often you wish to swim, and at which temperature and in which period you wish to swim. A number of popular pool heating systems are briefly discussed below.
Heating your pool with sunlight appears at first to be simple and attractive. It is an energy-efficient and environmentally friendly method for heating your pool. However, within this category of pool heating systems, there are a number of options, each having its advantages and drawbacks.
Solar water heaters are mainly used for residential heating or for sanitary facilities. The exact application depends in part on the number of panels installed on the roof. You can also use a solar water heater to heat not only your home but your pool as well.
This is far more environmentally friendly than gas or fuel heating, but you do need energy to power the solar water heater.
A good-quality solar water heater will set you back around €5,000. However, solar water heaters are not our first recommendation for a pool heating system. They have the disadvantage of working at reduced efficiency on overcast days. It is precisely on days like these that the solar water heater has to work hard to heat up the pool or keep it warm. For a warm pool, you will therefore have to continue to rely on sunlight.
Solar panels produce energy instead of heat. This is the biggest difference from a solar boiler. The energy is totally environment-friendly and is used to heat the home and the pool with an electric heating system.
To quickly heat up your home or pool, it is best to combine solar panels with an electric heating system such as a heat exchanger.
The price of such solar panels depends on the number of panels, the type and quality of the solar panels, the capacity of the panels, and the size of the family. The larger the family, the more energy has to be generated. The purchase of solar panels will quickly set you back around €10,000.
Solar panels, too, require a large surface area, which should preferably be south facing.
Heating your pool with solar panels is perfectly possible. It is environment-friendly and the energy is completely free. You do, however, need a considerable budget and surface to install the solar panels.
These solar mats are commonly used to heat small swimming pools that are taken down in the winter. In a pool heating system based on EDPM or solar mats, the water is pumped through the mats. There it is heated by the sun. The sun causes the solar mats to become warm. The mats then transfer the heat to the pool water.
As indicated earlier, this solution is intended mainly for smaller pools. First of all, because a large-volume pool requires more time to pump the entire volume of water through the solar mats. As a result, it takes a very long time to completely heat up a large pool with these mats.
In addition, you need a large area to install the mats. The area of solar mats should preferably be as large as the area of the swimming pool. These heating mats are usually installed on a flat roof. This means, however, that the pump must have sufficient capacity to pump the water all the way up to the roof. If the pump is not powerful enough, the water will heat more slowly.
A serious disadvantage of these EPDM or solar mats is their weather dependence. Without sunlight, the mats will not transfer enough heat to the pool water.
The price of such mats amounts to around €50 per square metre (without installation). For an 8 m by 4 m pool, this yields a purchase cost of approximately €1,600.
The operation of these solar collectors is quite similar to that of solar mats. Here, however, the piping is rolled up in some kind of dome, where the water is heated up. Compared with solar mats, this system takes up far less space. One dome heats up a volume of no less than 5,000 L. For an 8 m by 4 m pool that is 1.5 m deep, you will therefore need 10 of these domes.
However, this pool heating system, too, is advisable only for comparatively small pools. It is also dependent on the sunlight and uses a great deal of energy to pump the water through the domes.
The price for one dome works out at around €100. For the same pool, it is therefore slightly cheaper than solar mats.
Solar energy pool heating makes you reliant on the amount of sunlight. A heat pump is therefore a perfect alternative that does not rely on the sun for energy. That is also why it has for years been the most popular pool heating system in Belgium.
Using a heat pump for heating your pool water in fact provides numerous benefits. A heat pump is highly efficient, economical, easy to use, and durable. This type of heating is much more environmentally friendly than a gas or fuel pool heating system. In addition, heat pumps have a long service life. If you want efficient pool heating, you should choose a high-quality heat pump.
A heat pump uses electricity to extract heat from the outside air and distribute it into the water. The heat pumps do not generate any heat themselves.
Heat pumps are therefore dependent on the outside temperature. Heat pumps are efficient so long as the temperature is higher than 10 °C. They generate up to 5 kW of heat for 1 kW of energy.
If the outside temperature falls below 10 °C, it is best to shut off the heat pump. That is why heat pumps are ideal for those who want to swim from April until the end of October. There are, however, specific heat pumps that can be used at lower temperatures. If you want to swim the whole year round, you can use a heat exchanger in the winter months.
An electric pool heating system is expensive to use. It uses so much electricity that it can only be considered for whirlpools up to 1,500 L. An electric system is unsuitable for a standard pool of approx. 50,000 L.
The main drawback of gas or fuel oil heating systems is their low efficiency. These heating systems require 5 kW of energy to generate 1 kW of heat, whereas for a heat pump it is just the other way around. As a result, a great deal of energy is needed to heat a large swimming pool.
Solar systems are also quite popular pool heaters, but then you have to rely solely on the sun.
The principal advantage of a pool heat pump is its high efficiency and low energy cost. Subject to normal use, the pool heating cost of a heat pump works out at 600 to 700 euros per year. This does, however, imply the use of a good-quality pool cover.
Unfortunately, heat pumps are slow heaters, so it will take a couple of days to heat the pool from around 15 °C to 28 °C. You can expect to achieve a daily gain of 2 °C.
A heat pump is also dependent on the ambient temperature. The efficiency of a heat pump increases at higher temperatures, and decreases at temperatures below 10 °C.
Pool heat pumps are often thought of as being extremely noisy, but in fact they are not. The sound level corresponds to a whispered conversation. The heat pump does not cause any noise pollution except within a 5 m radius.
Your heat pump should preferably be installed outdoors. This eliminates the need for a service area that requires proper air supply and exhaust.
If the heat pump is installed outdoors, this is ideal to blow out the cooled air as far away as possible. This will benefit the direct ambient temperature of the heat pump and therefore improve its efficiency.
The heat pump need not necessarily be installed in the sunlight. The only parameter that matters is the ambient temperature. Around the heat pump, however, a clearance of 50 cm should be provided on each side. Along the side of the fan, a clearance of 3 to 5 m is indicated, again to allow the cooled air to escape as far as possible.
Noise is another parameter to be considered when installing the pool heating pump. While increasingly low-noise heat pumps are being manufactured, it is still preferable to reduce this noise to an absolute. This can be achieved, for example, by installing the heat pump just around the corner or behind the poolhouse.
To quickly heat up your swimming pool, we advise you to use a titanium heat exchanger. This is ideal for people who are not often at home to enjoy their pool. It will heat up your pool in just one day, making it ideal for a pool at a country retreat or for those who swim only sporadically.
Heat exchangers contain a corrosion-resistant heating element made from titanium. The electricity heats the resistor, which in turn transfers the heat to the water flowing past the resistance.
This titanium heat exchanger is connected to the residential heating system. This makes it a relatively inexpensive heating system to install. High energy consumption is the biggest disadvantage here. If you were constantly to use a heat exchanger to heat up your pool, it could cause a huge run-up in your costs.
Furthermore, this pool heating method is less eco-friendly than solar collectors or a heat pump pool heating system. The advantage of a heat exchanger is that it can heat up the swimming pool water even at colder temperatures and without the sun having to shine. For this reason, a heat exchanger is often combined with a heat pump or solar boiler.
With the titanium heat exchanger the water is quickly heated to a pleasant temperature. You can then let the heat pump or solar boiler take over to maintain the desired temperature without the pump having to be powered up all the time.
You can also use a wood stove to heat your pool. In this system, the water needs to run along the stove, where it picks up the heat that is caused by the fire.
This type of heating is mainly used on smaller pools for occasional use. Heating a pool with wood is quite labour-intensive and wood is also expensive (except if you happen to own a forest).
We do not recommend this system. If you want to heat a large pool with such a system, you will constantly have to supply it with wood.
Heating the water is important, but what is even more important is to keep the water warm for as long as possible, so that the heating system has to be used less often. That is why it is advisable to cover the pool with a tarpaulin or, better still, an automatic roller system. This will greatly reduce the cooling down of the pool water.
If you go for solar slats, the water temperature will rise automatically when the pool is not in use. This saves you a lot of energy every year!
It can pay back your investment in 2 to 3 years, reducing the energy consumption of your heating system. Using a swimming pool cover can limit the heat loss by 50%. If you decide to combine an automatic cover with solar slats, you can actually increase your pool's water temperature by using your pool cover.
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