Airbase publication

Unterdruck auf der Gebäudehülle durch die vorhandene Lüftungstechnik schützt insbesondere bei Hallenbädern die Dachkonstruktionen vor Konvektionsschäden. Durch die an Leckagen einströmende Außenluft werden jedoch jahreszeitlich bedingt hohe Feuchteschwankungen im Innenbereich verursacht. Diese Schwankungen...

Only qualified specialists can deliver airtight building envelopes. Unfortunately, such airtight envelopes still have many defects after completion, causing all kinds of adverse effects. This course is intended to train and qualify contractors and workers to ensure that they are able to seal building envelopes without instructions, safely and...

Die Ausführung der luftdichten Gebäudehülle erfordert qualifizierte Fachkräfte. Leider wird die luftdichte Gebäudehülle in der Baupraxis leider noch allzu oft mangelhaft ausgeführt – mit entsprechenden Konsequenzen. Ziel des Lehrganges ist es daher, Ausführungskräfte entsprechend zu schulen und zu qualifizieren, sodass diese dann...

The French database of building airtightness has been fed by measurements performed by qualified testers since 2006. The database is enlarged each year by more than 65,000 measurements since 2016, making the total number of measurements about 420,000 at the end of 2018. This work presents a statistical analyses...

Seit 2006 geben qualifizierte Messdienstleister ihre Messwerte in die französische Datenbank zur Luftdichtheit von Gebäuden ein. Seit 2016 wuchs sie jährlich um mehr als 65.000 Messdaten an, sodass Ende 2018 insgesamt circa 420.000 Messwerte vorlagen. Diese Arbeit befasst sich mit der Auswertung der französischen Datenbank...

In the Framework of the IEA EBC Annex68 Subtask 1 working subject, we aimed at defining an indoor air quality index for residential buildings based on long- and short-term exposure limit values. This paper compares 8 indoor air quality indices (IEI, LHVP, CLIM2000, BILGA, GAPI, IEI Taiwan, QUAD-BBC and DALY) by using the French IAQ Observatory database that includes pollutant concentration measurements performed in 567 dwellings between 2003 and 2005. This comparison allows to make a relevant analysis of each index and determines their pros and cons i.e.

In order to evaluate the impacts of volatile organic compounds (VOCs) emissions from building materials on the indoor air quality beyond the standard chamber test conditions and test period, mechanistic emission source models have been developed in the past. However, very limited data are available for the required model parameters including the initial concentration (Cm0), in-material diffusion coefficient (Dm), partition coefficient (Kma), and convective mass transfer coefficient (km).

This paper reports the results of an interview survey conducted among different stakeholders involved in design, installation and operation of residential ventilation in seven European countries. In total 44 interviews were performed. The results provide a valuable snapshot of current practices and insights into potential barriers and challenges regarding installation of mechanical ventilation in low-energy residences to maintain high indoor air quality (IAQ). The results show that mechanical ventilation with heat recovery is becoming a common choice in new low energy residences in Europe.

The overall objective of the International Energy Agency project, Energy in Buildings and Communities Annex 68 "Indoor Air Quality Design and Control in Low-energy Residential Buildings,"1 is to provide a scientific basis for optimal and practically applicable design and control strategies for high IAQin residential buildings. An obstacle for close inte­gration of energy and IAQstrategies in building design and optimization is the lack of an index that can quantitatively describe indoor air quality (IAQ) and be compared with indices that describe energy performance.

This study introduced a pre-assessment and control tool for indoor air quality (PACT-IAQ) which aimed at multiple pollutant concentrations simulations, pollutant loads estimations and decoration design scheme optimization. Multiple emission sources, sinks, ventilation, pollutant dissemination, and the combined effects of temperature and humidity on material emissions were considered in the tool. Two versions, namely the single zone and multi-zone models, were included in the tool.