IEA annex 62 on ventilative cooling approved!

During its November 2012 meeting, the Executive Committee of the International Energy Agency (IEA) Energy in Buildings and Communities (EBC) Programme – has approved to start a new multi-annual collaboration on the topic of ventilative cooling, which is application of ventilation flow rates to reduce the cooling loads in buildings. Ventilative Cooling utilizes the cooling and thermal perception potential of outdoor air. The air driving force can be natural, mechanical or a combination.

The operating agent is Prof. Per Heiselberg ( from Aalborg University. As of today, 12 countries participate to this annex.

One important first step of this annex will be a workshop in Brussels 19-20 March 2013 on ventilative cooling followed by a project planning meeting also in Brussels but on 21-22 March 2013. More information will be soon available on our website and on the AIVC website (

IEA project proposal on ventilative cooling is in preparation!

Ventilative cooling can be an attractive and energy efficient solution to avoid overheating of both new and renovated buildings. Ventilation is already present in most buildings through mechanical and/or natural systems and it can both remove excess heat gains as well as increase air velocities and thereby widen the thermal comfort range. As cooling becomes a need also outside the summer period the possibilities of utilizing the free cooling potential of low temperature outdoor air increases considerably.

This has led to the development of a new international IEA EBC project proposal with the following scope: “How and when can strategies for increased ventilation reduce the cooling load while maintaining good environmental quality?”

The new project is intended to address both residential and non-residential buildings, however, these two sectors will be treated separately because the issues, challenges and possible solutions are very distinct. It is also intended to address both new constructions and renovated buildings. The objectives of the project are to address the design challenges related to prediction and evaluation of the cooling need and the risk of overheating in high performance buildings as well as to develop new attractive ventilative cooling solutions.

The very first project definition workshop is held October 8-9, 2012 in Copenhagen just before the AIVC/Tightvent conference. It is expected that the next workshop will be held in March/April 2013. Please contact Professor Per Heiselberg (, Aalborg University, Denmark for further information.

Read the full article written by Per Heiselberg (Aalborg University, Denmark) in the 1st venticool newsletter.