Dantherm climate soloutions logo headers

How much does it cost to heat a swimming pool?

7 min read
Insights Content heat pumps

Heating a pool indoors or outdoors can be an energy-intensive process. To keep running costs down, we discuss what factors influence energy usage and how you can choose the optimal heating solution for your facility.

At one point or another, we all fantasise about bobbing in a perfectly warm pool at the height of summer; blue skies abound and the sun beaming down.

A private pool is a great way to get a taste of this inviting atmosphere. However, without the right solution in place, the energy needed to create this warm, welcoming pool can send costs skyrocketing.

To understand the costs associated with heating your swimming pool, it is crucial to gauge the power required, as energy usage is a considerable expense for private owners.

How to calculate the power needed to heat your pool

While there is no hard and fast calculation to estimate the precise energy required to heat your swimming pool, it is important to consider the following questions.

Is your pool indoor or outdoor?

If your facility is enclosed in a building, partially sheltered from the elements or entirely open-air, this will influence the rate at which the water, and the subsequent heat, is evaporated.

This is one of the largest factors that will influence the power required to heat your pool, as our own research suggests that 80% to 90% of heat energy is used just to replenish the warmth lost from evaporation.

Furthermore, wind exposure and wind speed is also highly influential on the heat loss of an outdoor pool.

Infographic showing how evaporation rates of swimming pool water are affected by element including heat and humidity

What size is your pool?

Beyond the nature of the facility’s shelter, the volume of water will influence the power required to heat it. Naturally, the more water there is, the more energy and time will be needed to reach and sustain the target temperature.

As well as that, the size of the pool itself can influence the rate at which warmth evaporates. Simply put, the larger the surface area, the faster the potential heat loss.

How do you plan on using your pool?

The intended use of the pool may also have an effect on the cost to heat it. If the facility was supposed to be more akin to a spa, for example, then the water would need to stay warmer than that of a standard swimming pool, requiring more energy

Water temperature isn’t the only bearing on the energy required. the cost to deliver the ideal amounts of heat may also be influenced by:

  • When you intend to use the pool throughout the year

  • How often you plan on using the facility every day

  • The average number of occupants

For instance, if you intend to have your pool available for the majority of the year, rather than simply the summer, access to a swimming pool heat pump capable of running in colder temperatures will be important.

What type of pool heater do you have?

As well as the size, scale and location of your facility, the heating solution you choose will also have a considerable impact on the energy required to maintain optimal conditions.

Each solution has a different coefficient of performance (CoP) that measures how energy efficient a specific solution is. To illustrate this metric as an example, a pool heater with a CoP of 1 will generate 1kW of heat energy for every 1kW of energy it uses.

Gas heaters

By burning gas in a combustion chamber, heat exchangers transfer heat to the pool water. Aside from having an impact on the environment, these heaters offer an average CoP of between 0.8 and 0.85.

Oil heaters

Oil heaters operate almost identically to gas heaters, however, the fuel used in the combustion process is different. This technology also often generates a CoP of between 0.7 and 0.75, and presents the same environmental issues.

Electric heaters

Instead of using combustible fuel as a source of energy, electric pool heaters utilise electricity to heat coils and warm pool water. Despite being greener than burning fossil fuels, these heaters often have a CoP of close to 1.

Solar power

By capturing the rays of the sun, solar panels can generate renewable energy independent of an electrical grid to heat the pool water. While this energy is free and clean, solar technology relies entirely on the weather and investing in solar panel technology, which can make it a substantial investment.

Swimming pool heat pumps

By exploiting the energy of the outside air in an evaporator, a swimming pool heat pump generates heat that is then transferred via a condenser into the pool water. This can generate a CoP of between 5 and 10. This means that for every 1kW of electrical energy put in, these heat pumps can deliver anywhere between 5kW and 10kW of efficient heat energy.

Comparing the energy efficiency of different types of pool heaters - Infographic and statistics

Further swimming pool heating considerations

Beyond the factors previously discussed, swimming pool water heating can also be impacted by a number of other elements, both inside the pool and out. Some of these considerations include:

Considerations that can affect Swimming pool heating rates - Infographic

In order to get a precise figure for the cost of heating your pool, speak to the experts at Dantherm by getting in touch online, or by filling out the contact form below

What type of pool heater is ideal?

While there are several types of solutions on the market, swimming pool heat pumps offer the best blend of energy efficiency, practicality and power. As a result, this technology is the ideal choice to keep running costs to a minimum.

While power usage is an important concern, the last thing you want is to be restricted from using your pool because your heater is unable to operate in certain conditions. In this respect, heat pumps also prove themselves as the optimal solution, requiring only electricity and air to operate.

Furthermore, in comparison to gas or oil-based heaters, heat pumps are more efficient and generate fewer emissions, making this technology better for the environment.

Aside from the advantages discussed above, Dantherm favours swimming pool heat pump technology because they:

  • Require no fuel storage tanks or high-capacity power supply

  • Operate year-round in a wide variety of conditions and countries

  • Can pair with other solutions, such as solar panels

Infographic showing why inverter pool heat pumps are energy efficient compared to standard on/off swimming pool heat pumps.

Which swimming pool heat pump is ideal?

While a swimming pool heat pump is the ideal type of solution to tackle sky-high pool bills, not every pump is built equally. To harness the full spectrum of advantages this technology can provide, choose a product from a brand you can trust.

Dantherm is a leading name in pool climate control. With over 60 years of experience, our knowledge continues to guide the installation and design of cutting-edge technology that places reliability, sustainability, efficiency and usability at the heart of our solutions.

Our range of heat pumps harness inverter technology. This means that rather than being simply on or off, the pump will run at maximum capacity to heat the pool, then slow down to its optimal control point – when the exact amount of heat it provides off-sets the amount lost through evaporation.

This unlocks potentially huge energy savings while the pump is running slower, as well as reduced noise, while maintaining a consistent, comfortable temperature for all users.

Product showcase comparing 2 Dantherm inverter swimming pool heat pump models with features information.

Talk to the experts

If you are looking for a cost-effective and eco-friendly solution to keep your pool temperature at the optimal level indoors or out, choosing the right type of heater is only the beginning.

To select the right solution for your needs, and operate your selected heater as effectively as possible, get in touch with the experts at Dantherm or fill out the contact form below.

Related products

Dantherm HPP-iw 12-16-22-28 – inverter swimming pool heat pumps
Dantherm climate soloutions tab flip

Swimming pool heat pumps – inverter

The low energy consumption coupled with high heat production makes the HPP-i heat pump an environmentally friendly way to heat your swimming pool.

Calorex V-PAC 12-16-22 – inverter swimming pool heat pumps
Calorex tab flip

Top outlet swimming pool heat pumps

Top outlet energy efficient pool water heating by inverter-controlled heat pump technology.

Dantherm HPP-iw 12-16-22-28 – inverter swimming pool heat pumps
Dantherm climate soloutions tab flip

Swimming pool heat pumps – inverter

HPP-iw heat pumps are designed to work all year round when temperatures are above -10°C. Thus, the pool season can be extended for several months.

Calorex I-PAC+ 12-16-22-28 – inverter swimming pool heat pump
Calorex tab flip

Small inverter heat pumps

All year round heating for indoor and outdoor pools by inverter-controlled heat pump technology.

Calorex I-PAC 8-12-16-22 – inverter swimming pool heat pumps
Calorex tab flip

Small inverter heat pumps

Energy efficient pool water heating by inverter-controlled heat pump technology.

I PAC 100 – inverter swimming pool heat pumps
Calorex tab flip

Large inverter heat pumps

I-PAC commercial heat pumps are specifically designed to economically provide heating to high activity and larger pools such as those in camp sites, leisure parks, hotels

Featured insights

Insights Content Dan X CF
Dantherm climate soloutions tab

Meet the latest addition to Dantherm’s market-leading range of swimming pool air handling units.

Photo of Niels Nautrup
Niels Nautrup 5 min read
Insights Content pool dehum
Dantherm climate soloutions tab

Gain valuable insight into what you need to select the right size dehumidifier for your pool.

Photo of Niels Nautrup
Niels Nautrup 6 min read
Insights Content 6 must know
Dantherm climate soloutions tab

Finding the ideal balance of air quality, climate control and cost-saving

Photo of Nic Holm
Nic Holm 9 min read

Reach out to an expert

Need help with choosing the right solution? Our team of over 100 climate control experts can assist.
You can also reach out or join the discussion on our Social Media. Check out our LinkedIn page.