Cost efficiency guide

This guide, released by the Zero Carbon Hub, is a step-by-step guide for small and medium-sized enterprises (SME) housebuilders on building energy efficient homes cost effectively. It begins with highlighting high areas of cost risk when building a low energy home and focuses specifically on photovoltaics (PV) and solar thermal, wall insulation, heating, airtightness and ventilation, thermal bridges and orientation.


BUILDAIR Symposium 2017

This top conference in the field of airtightness is directed to all measuring teams, energy consultants, planners, and architects. Colleagues from Germany and abroad will present their expertise and experience. The symposium will also promote mutual exchange and cooperation across national borders to in order to make reaching the goal of energy-efficient buildings easier. Therefore, the organizers invite you to present your current insights and your recent experiences at the symposium. Your contributions can be either common subjects or serve to impart expert knowledge.


10th International BUILDAIR Symposium - Call for Papers

The 10th International BUILDAIR Symposium, on March 31 and April 1, 2017, in Hannover, offers a futureoriented programme about the field of airtight building envelopes, thermography and ventilation systems. Its ambition is to disseminate new knowledge, deepen understanding of common topics and promote an exchange of ideas amongst all those involved in the construction sector.


Domestic Ventilation Systems - a guide to measuring airflow rates (BG46/2015)

This guide, released by the Building Services Research and Information Association (BSRIA), describes the conditional and unconditional methods of airflow measurement as well as the minimum benchmark method.  The document responds to a requirement in the England and Wales Building Regulations for mechanical ventilation air flow testing, by making sure that the methods used for measuring airflow rates are fit for purpose.  The aim of this guide is to help improve the standard of domestic ventilation installations. 


Fiche de synthèse sur les règlements européens éco-conception et étiquetage énergétique des produits de ventilation

This leaflet, released by Uniclima, the French association of ventilation system manufacturers, summarises the requirements of the two European regulations N°1253/2014 and N°1254/2014 about ecodesign and energy labelling of ventilation units.

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?