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Home » What are the Different Options for Heating My Pool?

What are the Different Options for Heating My Pool?

In the case of heating the water in your pool there are two kinds of heating systems that you can choose from two types of systems: Primary and Secondary.

The primary system permits the bather to set thermostatic controls at a particular temperature, typically between 22degC to 30degC. The heating system will continue to operate until the water is at the desired temperature, regardless of the external conditions (i.e. the temperature of the air, weather conditions and sunlight etc.)

A secondary system can increase the temperature of water, however it is dependent upon external influences. Secondary systems typically cannot ensure that the water temperature will be at the temperature that is desired, and being such, are typically utilized as a backup to the primary systems.

If used together when used in conjunction, a primary and a secondary system can provide substantial savings on operating costs. This is due to the fact that the secondary system kicks into action when external forces favor it and it will step in when external circumstances are not.

Air-source heat pumps are an excellent example of this. If the weather is pleasant and the temperature in the surrounding area is quite high, the heat pumps function very effectively as a second system. But, if the weather is bad and the temperature of the surrounding area is cooler and cooler, the heat pumps will not function as effectively. To counter this the problem, a gas heater (primary system) is a good option to make sure the desired temperature is attained.

Primary Heating Systems

Below are the most popular heating systems that can be utilized to provide heat to the swimming pool.

High-performance fuel oil boiler for high performance

In a pool with a dedicated heater, domestic fuel oil is burned to heat the fluid inside a closed loop to an extremely high temperature. The heated fluid circulates through a set of titanium or stainless tubes, which come in contact with the pool’s water which heats the water up.


The source of heat is always at hand, regardless of the weather.
Rapidly warms pools.
Could be an investment opportunity, particularly in the event that the existing boiler is near that pool’s system.
It is a perfect fit with other systems (i.e. renewable energy systems that are secondary to the primary system).


The running costs are relatively high when being used as the sole source of heating.
Fueled by fossil fuels, which means the carbon footprint is high.
Costs of fuel rising for oil.

High-performance gas boiler

A high-performance swimming pool boiler install operates exactly the same way as the fuel oil boiler, however they utilize natural gas LPG or even butane to be the primary source of fuel.


Similar advantages to the boiler that uses fuel oil (above).
Gas boilers are small and require the smallest amount of space.
Lower emissions from oil boilers.


The running costs are relatively high when employed as the sole source of heat.
If there isn’t a gas source nearby, the charges for connecting could be costly.

Note Propane (LPG) and butane solutions have the same benefits like natural gas even when gas supplies are not readily available in the area you reside. However, the operating costs are about 280% higher, so they are very expensive to operate when compared to natural gas.

Air/water heat pump.

As fossil fuels continue to be rising heating systems are receiving significant media attention for their eco-friendly credentials as well as highly efficient performance. In addition, they are becoming increasingly popular option for heating swimming pools.

How do they work

A heat pump that is air-to-water absorbs warmth from the atmosphere, and transfers it to the water in the pool. The air around you doesn’t need to be warm, even cold or cool air contains energy from it, which a heat-pump is able to extract. However, the more warm the air warmer, the more heat the heat pump will be in a position to absorb and the better it can operate.

The natural energy of the environment is absorbed into the heat pump through an enormous fan. The energy is absorbed first by the first heat exchanger, also known as an evaporator, which is comprised of a highlyconductive chilled refrigerant fluid. A smaller pump is utilized to move the the heat pump and allow that the fluid to absorb out of the atmosphere. In this process the liquid changes from being a cold liquid to the cool vapour.

The cool vapour is then passed through a compressor that squeezes it and dramatically raises temperatures of vapour. The hot vapour now is then pumped through a pool water heat exchanger where it is transferred to the pool water, causing it to heat up. When it releases its heat it condenses into an icy liquid before going via an expansion valve, which converts it to an icy liquid and it restarts the process.

They’re an excellent choice

The most notable feature of heat pumps is that they can produce more energy from the heat source than they consume in their operation. This is called the ‘coefficient effectiveness’ (COP) and explains the reason why heat pumps have more than 100% COPs..

For instance, the heat pump that has an COP of 5 indicates that it will generate 5kWh of air heat for every kWh it consumes for electricity to operate. That’s effectively an output of 500 percent.

The latest generation of water-to-air heat pumps, like those we have in our swimming pools, have COPs ranging from 5.22 as well as 5.73 (i.e. 52 percent efficiency and 473% output). If you compare it to the highest COO value that is 1.09 in modern boilers using gas, it’s difficult to comprehend why heat pumps are gaining in popularity.


A low-cost system that offers a high return on investment when compared to heating systems that use fossil fuels.
Full-scale primary heating when the capacity of output is +0.35 kWh per m3 of pool water.
Fantastic ecological credentials and perfect for creating an energy-separate swimming pool that is powered by photovoltaic panels.
It works by utilizing the heat of the air around it, which means it can heat your pool even when the sun doesn’t shine.
It is possible to heat water at late at night, and you can benefit from lower electricity prices at night.


It’s usually not feasible to utilize a heat pump to warm the water so that you can swim in winter months, since its effectiveness is reduced when temperatures drop to below 10 degrees Celsius.
Its benefits are vast, however, they are difficult to convey to a broad audience.

How do you choose the right heat pump?

Choose a model that has a the titanium exchanger. This type of material provides the highest heat transfer and is essential to the efficiency of the heat pump. It also is resistant to some of the chemicals that are employed to keep the water clean.
Find COP values that are 15degC or more temperature. The top air-to water heat pumps have COPs of at minimum 5.2 for this particular temperature.
Get a written warranty for five years. The legal minimum is two years, but since components such as heat exchangers can be costly to replace, it is recommended that companies back their products by extending their warranty.
Beware of products that are cheap. Although the initial price may be appealing, you’ll ultimately in the red in the event that the product fails or gets less effective over time.

Secondary Heating Systems

Solar panels

Solar panels absorb sunlight’s rays and, with the help of a liquid, store the energy in an initial circuit. They then convert the energy into heat using the use of a heat exchanger, prior to transmitting the energy to the water in the pool. Since they are an element of nature and are among the most popular forms in renewable energy.


Frost-free system thanks to the addition of glycol to the primary circuit.
Aesthetic designs.
There is a relatively small area required as compared to the other systems that use solar energy (i.e. 12-14m2 needed to heat 50m3).
Use diffused light, as well as the sun.


Very expensive system, and takes an extended time to reach break-even (at minimum 12 to 18 years).
A costly heat exchanger plate is required to ensure yield in the months of spring and autumn.
Despite the substantial investment it is able to achieve the expected results under ideal conditions (30deg slope that faces to the south).

EPDM Mats made of PE or rubber. Mats

Mats for sun can be put on flat roofs or sloping roofs in the event that there is enough space. The majority of manufacturers recommend that 67 percent of the area is a suitable mat area. However, we believe this isn’t the case based on our experience, we believe that 100 percent is more realistic. 150% is an ideal area.

These mats take in the pool’s water and then heat it up with their plastic cover that is warmed up. Simple measurement and control technique is used later to heat the water in the pool.


Affordable heating systems.
Simple technology.
Aesthetic because of the installation on flat roofs.
Break-even period is limited (3 up to four years).


Not the most attractive on sloped roofs.
Highly sensitive to storm-related damage.
Only work only when the sun is shining.
Block any work that is needed to be repaired for the roofing.
Don’t allow the temperature of your pool’s water to be controlled.