airtightness

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?

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.