Free Cooling

Free cooling saves energy and operating expenses at Telecom sites, where the application of traditional air conditioners has resulted in very high energy costs. By using free cooling, the overall thermal management running expenditure can be reduced by up to 90%.

Free CoolingFree Cooling - how it works

Dantherm's Free Cooling solutions create a fine-filtered overpressure. Motorized dampers are recommended to ensure optimum airflow in the shelter and to prevent ambient air from entering the shelter or room.

Total heat management

The Dantherm Free Cooling solutions provide the option of total heat management in the shelter, as the system controls both connected heating and air conditioning systems. Even surveillance and alarms are part of the Free Cooling solution.

Free Cooling Combo4th generation free cooling

The Free Cooling technology has been used by Dantherm for more than a decade and has been through 4 design generations resulting in related know-how build-up. 


When choosing a cooling technology that utilizes ambient air to cool, it is important to understand the concept of delta t (Δt):

Δt = t internal - t ambient

The capacity is stated as e.g. 288 W/K. This means that a difference in temperature of 1Kelvin = 1°C, the cooling capacity is 0,288 kW.

Example: Average ambient temperature: 20°C, desired internal temperature: 25°C = Δt = 5 (25-20).


Humidity in relation to Free Cooling is a frequently asked question. When using Free Cooling, you may apply humid and cold ambient air into an electronic enclosure to cool it down. When the humid ambient air meets the warm air in the enclosure, it is heated and the relative humidity will decrease - leaving no risk for condensation on the electronic equipment.

Free Cooling Solutions

View our selection of energy-saving Flexibox Free Cooling units.

Facts: Free Cooling
  • Energy savings of up to 90%
  • No need for inverter
  • Compact design
  • Mono-block units
  • Very high performance
  • Brushless DC motor
  • Weather-proof casing
  • Ideal for off-grid sites
  • Ideal for battery cooling
Flexibox Free Cooling
How does Flexibox work? Play
Flexibox Combo Cooling
Flexibox working in combination with Air Conditioner in Telecom Shelter Play
Installation Video:
Dantherm Flexibox Installation movie Play
Dantherm online catalog Contact
We look forward
to answering
your questions!

Customer support
+1 (864) 595-9800

Online contact form