To take full advantage of your swimming pool, you must have essential equipment such as an electric robot, a filtration pump, a sand filter, a technical room, a cover or a heat pump. This last tool is a swimming pool heating system that provides water at the ideal temperature and significantly extends the swimming season. Choosing a pool heater, however, can be a real challenge with the multitude of models available on the market. We give you 5 tips for choosing the right swimming pool heat pump for your needs.
Consider the size of the pool when choosing your heat pump
The size of your swimming pool is a very important criterion to take into account when choosing your heat pump.
The power of your pool heat pump
This equipment is indeed programmed for a certain number of cubic meters. The greater the volume of water in your pool, the more powerful the heat pump must be. If you choose a device that is too powerful, it will certainly heat your pool in record time, but it will consume a large amount of energy because it will work continuously. If, on the other hand, you opt for undersized equipment, it will take a long time to heat the water, and will have difficulty maintaining an ideal temperature. Here is a summary of heat pump power adapted to each volume of water :
- 3 kW for 10 to 20 m³,
- 4 kW for 15 to 25 m³,
- 5.5 kW for 20 to 30 m³,
- 7 kW for 35 to 45 m³,
- 9 kW for 40 to 50 m³,
- 12 kW for 55 to 65 m³,
- 15 kW for 70 to 80 m³,
- 18 kW for 80 to 90 m³,
- 20 kW for 90 to 110 m³.
For these calculations to be verified, you must also use a roller shutter or a bubble cover. When you do not have an isothermal system, the heating power required must be doubled for the same pool. Note that these powers are given simply as an indication and that they must be refined in each particular case.
The performance of a swimming pool heat pump
The operation of a swimming pool heat pump is based on air-water heat exchange. This energy-efficient and economical system consist of consuming the calories naturally present in the air and then returning them to the water. The coefficient of performance (COP) makes it possible to determine the efficiency of a swimming pool heat pump by considering the ratio between the quantity of energy consumed and that returned (between 4 and 7 on average).
The efficiency of the air-water heat pump increases as the COP is high. The higher the latter, the less the heat pump consumes, which reduces your electricity bills. Manufacturers usually state the coefficient of performance of 15°C for heat pumps. Before buying a heat pump, it is advisable to look for this indication in order to know its COP and the value of the temperature that suits it.
Climate and weather conditions
Climate and weather conditions are important factors when choosing a swimming pool heat pump. In France, for example, these factors vary from one region to another. Seasonal temperatures and phenomena such as frost, wind, or sun vary whether you are in the south, in the north, in the mountains, or even by the sea. The power requirement of a heat pump swimming pool is therefore not the same in all geographical areas. You must therefore choose a heat pump that corresponds to the climatic conditions of your area. If your swimming pool is located in a region that is too hot, it is advisable to opt for a reversible heat pump. This will prevent you from having the inconvenience of swimming in water whose temperature is around 30°C.
Moreover, the treatments become totally ineffective or deficient when the temperature of the water in your swimming pool approaches 30°C or more. This can make it difficult to maintain water balance and promote algae growth. If your pool is in a temperate region, on a shady site, or in a windy or high-altitude location, it is advisable to choose a powerful heat pump. Many other variables must be considered to determine the ideal pool heat pump model for each region. You can seek advice from specialists to make the optimal choice.
The characteristics of the swimming pool
There is a correlation between the heat pump and your swimming pool. To choose the right heat pump, you must know its characteristics well. You must take into account the volume of your pool, the base temperature, the desired average temperature, the presence or not of night protection and the degree of sunshine. With regard to this last criterion, the ideal is that your swimming pool is well exposed to the sun and sheltered from the wind and elements that can shade it such as walls or trees. You must also take into account the period during which you wish to use your swimming pool. In some regions, it is possible to open the bathing season in the spring as soon as the temperature first rises and to use it until the end of autumn.
The climate, the type of your pool, and the construction materials and coatings used are also very important criteria. If you live in a humid region, frequent rains can cause the water temperature to drop. Regarding the type of pool, note that in-ground pools generate less calorie loss compared to above-ground pools. A hard-built swimming pool does not have the same heating needs as one with a polyester shell. Basins made with insulating formwork blocks have a high heat storage capacity. Their wall limits the loss of calories. If your pool is built with this type of material, you won’t need a very powerful heat pump. The price of electricity and the presence of a roller shutter or shelter are also factors affecting the choice of a heat pump.
What budget is for your CAP?
The pool heat pump is a fairly expensive device to buy. Compared to solar or electric heating, this method of heating is quite expensive. It is, therefore, necessary to reserve a substantial budget to obtain it. Taking into account its yield, it nevertheless represents a fairly significant return on investment. The price of a heat pump is determined according to its power. To buy a small device intended to heat a small swimming pool of 20 m³ for example, you must plan an average budget of 400 euros. For a more efficient device that can heat a large pool of at least 60 m³, you should allow 2000 to 4000 euros. To install an aerothermal pump, you should allow around 1000 or 2000 euros for labor. For the installation of a geothermal device, the professional can charge you between 5000 and 6000 euros.