The heating system was built in 1980 and consisted of two oil boilers with a capacity of 600 Mcal/h each, which fed the three plate heat exchangers of the swimming pools, the heaters of the auxiliary spaces and an 800 lit boiler for the production of DHW. The existing heating system, due to its age, operated with very low efficiency factors and was particularly energy-consuming. Because of this situation the services offered to the users were not ideal especially in the winter months.

In 2013, 25 sq.m. selective surface solar collectors, which do not manage to fully cover the needs, as a result of which the use of the boiler is also required to cover the DHW needs.

The proposed interventions for the energy upgrade of the Municipal swimming pool of Kalamata, so that its operating costs are reduced and the services provided to bathers are upgraded as this was not possible with the existing outdated heating system, are the following:

• Removal of existing boilers, exchangers, boilers, heating circulators, piping and swimming pool water recirculation pumps.
• Installation of a shallow geothermal system with a total power of 900 Kw that will completely cover the needs of the swimming pool in heating water for swimming tanks and ancillary areas.
• Installation of a high-temperature air-water heat pump with a thermal power of 147 Kw that will cover the needs for DHW production.
• Installation of three (3) dual energy boilers, each with a capacity of 1000 liters .
• Installation of selective surface solar collectors, with a total area of ​​170.64 sq.m., to cover not only the DHW needs, but also the rest of the thermal energy to be channeled into the heating of the swimming pools.
• Installation of new swimming pool water recirculation pumps, which will be driven by inverters.
• Installation of isothermal cover in the small pool