Free Cooling Systems
High energy saving air conditioning unit
Using renewable energy sources is key to reducing the environmental impact of systems. Tecnair has developed a Free Cooling system capable of achieving energy savings of over 50% compared to a conventional air conditioner.

An increase in the system efficiency

Free cooling from renewable sources
Using outside air to cool environments is the primary source of energy savings available in temperate climate areas. TECNAIR developed FREE COOLING units, capable of ensuring high energy savings combined with the efficiency and reliability that distinguish this type of product.

Intelligent energy saving
The high number of hours per year in which Free Cooling systems can be used ensures that the air conditioning system energy consumption can be reduced by over 50%. This is reflected in an immediate environmental sustainability increase, thanks to a significant reduction in CO2 emissions, and system operating costs.

Indirect free cooling
The Indirect Free Cooling system is characterised by a hybrid unit, consisting of a primary water circuit and a secondary direct expansion or chilled water circuit. The primary water circuit is connected to a dry cooler utilising outside air - a source of renewable energy - to cool water. The secondary circuit exploits mechanical cooling.

Self-adaptive set-point of the dry cooler
To maximise the efficiency of the Free Cooling system, the unit can directly regulate the dry cooler coupled to it. Thanks to the self-adaptive set-point function, the water temperature is optimised to the ambient conditions through the fan speed regulation. This leads to an increase in the system efficiency, allowing you to maximise the performance of both the Free Cooling and direct expansion circuits, ensuring highly efficient low condensing temperatures. In addition, the dry cooler fans will partially operate even with high ambient temperatures, thereby increasing the energy savings of the system.
Free cooling operating hours per year
Number of hours with temperatures lower than or equal to 18°C.

Country / Number of hours / % of total yearly hours
Amterdam / 5.641 / 64%
Athens / 4.491 / 51%
Belgrade / 5.105 / 58%
Berlin / 5.583 / 64%
Brussels / 5.545 / 63%
Bucharest / 5.503 / 63%
Budapest / 5.279 / 60%
Copenhagen / 5.861 / 67%
Dublin / 7.161 / 82%
Helsinki / 5.796 / 71%
Istambul / 4.779 / 55%
London / 5.575 / 64%
Madrid / 4.643 / 53%
Milan / 5.281 / 60%
Moscow / 6.046 / 71%
Oslo / 6.202 / 73%
Paris / 5.187 / 59%
Prague / 5.619 / 64%
Reykjavik / 7.743 / 88%
Vienna / 5.651 / 65%