1.2.6 Use of free-cooling

1.2.6 Use of free-cooling


Free cooling consists in using the outside air cooling capacity to renew and cool the inside air of a room, reducing the energy consumption of the cooling equipment. As consequence, the system only switches on extraction and air conditioning fans, avoiding starting up the compressor of the cooling equipment.


  • The energy consumption reduction potential is medium. With this measure, it is estimated that the achieved savings in the total energy consumption can be up to 18%


  • Reduction in energy dissipation


  • Effectiveness linked to environmental conditions (the determination of the dissipation depends entirely on environmental characteristics)


Economic assessment

Initial investment: low. In some cases the cost of this measure will be zero, if a ventilation system coupled to the installation of air conditioning is already available.


References and best practices

Image gallery


Environment or playable world:

  • Residential

  • Academic

  • Offices

  • All

Carried out by:

  • Public building users

  • Owners

  • Operators

  • All

Reduce consumption of:

  • Heating

  • Cooling

  • DHW

  • Lighting

  • Electric devices

Type of driver:

  • Physical environmental

  • Contextual

  • Psychological

  • Physiological

  • Social

Time framework:

  • Short term
  • Long term

Type of measure:

  • Envelope
  • HVAC
  • DHW
  • Lighting
  • Electrical devices
  • Other
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