1.1.3 Close windows and doors when HVAC systems are operating

1.1.3 Close windows and doors when HVAC systems are operating


Make sure windows or doors are not open unnecessarily, especially when heating, cooling or air conditioning systems are operating. To ventilate the room it is sufficient to have the window open for 10 minutes. In addition, keep it opened for longer involves losing heat from the heating system or cold from the air conditioning system.  Turn off the HVAC systems during that time.



  • Easy application
  • Saving in heating and cooling costs could be considerable, depending on unnecessary openings


  • Occupant acceptance

Economic assessment

The cost is zero, although it is convenient to train and inform properly users on these issues.


References and best practices

  • Keeping cool (or warm) sustainably at work: uq.edu.au

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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