What is building airtightness?

Building airtightness (also called envelope airtightness) can be defined as the resistance to inward or outward air leakage through unintentional leakage points or areas in the building envelope. This air leakage is driven by differential pressures across the building envelope due to the combined effects of stack, external wind and mechanical ventilation systems [1].



[1] G. Guyot, F. R. Carrié and P. Schild, “Project ASIEPI – Stimulation of good building and ductwork airtightness through EPBD” 2010, 2010.

What is building airtightness?

Passivhaus primer: Airtightness Guide

This guide, released by the Passivehaus UK, is intended for the design team and contractors; it serves as an aid to understanding the key principles involved in achieving the airtightness performance required to meet the Passivhaus standard. The document also describes how to ensure that the building is correctly air pressure tested for compliance with Passivhaus certification (n50) pressure test requirements.


37th AIVC Conference - Abstracts due December 14

37th AIVC - 18th ASHRAE - IAQ 2016 joint Conference: “Defining Indoor Air Quality: Policy, Standards and Best Practices”. Call for abstracts extended DECEMBER 14, 2015


The call for papers for the 37th AIVC - 18th ASHRAE - IAQ 2016 joint conference has been extended: The new deadline for abstract submissions is 14 December, 2015.

The papers should focus on the following themes and topics among others: