The current development in building energy efficiency towards nZEB buildings represents a number of new challenges to design and construction. One of these major challenges is the increased need for cooling in these highly insulated and airtight buildings, which is not only present in the summer period but also in the shoulder seasons and in offices even in midwinter.

Air infiltration in buildings has multiple consequences on energy use and indoor environmental quality. Therefore, in the last 10 years many countries have introduced requirements for building airtightness in their EP-regulation.

The Air Infiltration and Ventilation Centre (AIVC) in collaboration with IEA EBC Annex 86 organized a spring workshop consisting of a series of four webinars on:

The AIVC in collaboration with IEA EBC Annex 86 organized a workshop consisting of a series of four webinars on:

The Air Infiltration and Ventilation Centre (AIVC) in collaboration with IEA EBC Annex 86 organized a workshop consisting of a series of four webinars on:

The Air Infiltration and Ventilation Centre (AIVC) in collaboration with IEA EBC Annex 86 organized a workshop consisting of a series of four webinars on:

The current development in building energy efficiency towards nZEB buildings represents a number of new challenges to design and construction. One of these major challenges is the increased need for cooling in these highly insulated and airtight buildings, which is not only present in the summer period but also in the shoulder seasons and in offices even in midwinter.

Extensive research studies in many countries have found gaps between the design intent and real-world operation of buildings, which often lead to much higher energy use in practice than was estimated at design stage.