Solar pool heaters

Solar pool heaters can easily double the time you can spend in the swimming pool throughout the year. A conventional solar pool heater collects the heat energy from the sun and transfers the heat to the pool water. By the installation of solar pool heaters you can open your pool much earlier and close it much later than your neighbours. You shall also be getting the satisfaction of knowing that the heating of your pool is the most effective eco friendly process.

The installing costs might be a bit on the higher side when compared to other conventional pool heating options; however you can always get your money’s worth on the savings that you would make on the operating costs.

How do solar pool heaters work?

A conventional solar pool heater has the following components in general

  • A solar collector which circulate the pool water that heated by the sun.
  • A filter that removes the debris before the water is pumped through the collector.
  • A pump circulates the water through the filter and collector and then drains it back to the pool.
  • A flow control valve is also present that may be automatic or manual and they generally divert the pool water into the solar collector.

On a simpler note, the pool water is basically pumped through the filters and then into the solar collector which is already heated up by the sun, this heat is transferred to the water when the water comes in contact with the collector.  The hot water is now returned to the pool and a repetition of this cycle ensures the water to be gradually heated up. Conversely in places with warmer climates, this same principal can be used to cool down the pools during the peak summer months when water is run through the circulator all night.

Automatic or manual sensors act by observing the difference in the temperature of the air and water and thereby divert the water of the pool in to the solar collector.

Different materials are used for the making of solar pool collectors. The types however vary based upon the climate of installation and on the intent of using the collector.

  • The unglazed collectors are the lower and cost effective versions which you are likely to be using to keep your pool from freezing. These collectors don’t have a glass covering and are generally prepared from heavy duty plastic or rubber that are treated with ultraviolet light inhibitor so as to minimise the wear and tear of the collector. This type of collector can be well used in indoor pools specially if the design is made so as to drain the water back into the pool when not in use. Even if the system is shut down during the cold months, the unglazed collector is much more cost effective than the more expensive glazed ones.


  • The glazed collectors on the other hand are composed of copper tubing or an aluminium plate covered with an iron tempered glass. This naturally increases the cost and the efficiency is also increased exponentially with the use of better technology in the form of heat exchangers and transfer fluids. In the countires with colder weather and requirements of year round hot water for domestic purposes, the glazed water heater is much more recommended provided you have the budget to get it done.

On a final note it is always recommended by the experts that whatever your solar pool heater be made of, your collector system should always include a freeze protection.

Thank you for reading this article on solar pool heaters.


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