How is a pool heater installed?

You have decided on a pool heater and would now like to find out how to connect it to your pool? We would like to explain how the proper installation of a pool heater works. We distinguish between the different pool heating types: electric heating, heat pump and solar heating.

In principle, the location where the pool heater is installed is the same for all heating variants. The heater should always be installed between the filter and the pool in the return line so that the pool water is only heated after cleaning.

Installation of an electric pool heater

An electric pool heater is installed directly at the pool pump. To do so, the inlet hose is attached to the lower connection of the heater. If the pool is already filled with water, then the ball valves should first be closed, the filter screen removed and the cap placed on the opening of the skimmer. Now the return hose can be removed from the pump and connected to the upper connection of the electric pool heater. Then connect the inlet hose to the lower outlet of the pump.

When everything is stable, the ball valves can be opened again, the closures removed and the filter screen inserted. The electric pool heater is now ready for operation and can be connected to the electricity. Now the heating is switched on first and then the pump. If the pool heater was delivered without a power plug, the installation should be carried out by an electrician.

Installation of a heat pump

A heat pump is installed in the return line between the filter system and the inlet nozzle at the pool. Since the heat pump cannot process large masses of water, a bypass is placed on the return line, which is located between the supply line and return line of the heat pump. This regulates the flow of water that is discharged into the pool or into the heating system.

For a heat pump to perform at its best, it should ideally be located outdoors to draw in enough fresh air. It is also recommended to place the heat pump at a certain minimum distance from buildings, trees or bushes, as the cold air emitted can cause damage in the surrounding area.

Installing a solar pool heater

A pool solar heater is installed in the return line of the pool filter system just like the heat pump. The associated solar absorber fields are laid out in a suitable sunny location. This could be a lawn or a roof. AQSOL's absorber panels are customised and made to measure for your pool size and can adapt to any roof or terrain surface.

The individual solar fields are connected with hose connectors and sealed with clamps. The last two absorber panels each contain an end cap, a drain ball valve or a bleed valve. The drain and supply lines are connected to the outward-facing corners of the solar panels and the pipes are connected to the pool's pump. A mechanical or electrical three-way valve at the inlet regulates the water flow through the absorber fields. With a temperature control, the solar system can even be operated completely automatically to make the best possible use of solar energy.


The installation of a pool heater can be carried out by any technically skilled person. We will be happy to answer any questions you may have about the installation of our AQSOL solar heating system. Feel free to contact us without obligation by e-mail, phone or our contact form.

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