Improvement of buildings envelope airtightness in France: analysis of about 90,000 measurements performed by certified operators

Purpose of the work

Since 2008 in France, all measurement of building envelope airtightness performed according to the EP-regulations have to be performed by a certified operator. This certification includes a yearly follow-up we use to build up a highly detailed database which includes data of about 90,000 airtightness measurements.

Method of approach

Quality framework for residential ventilation systems in Flemish Region in Belgium – feedback after three years’ experience

A ventilation performance report is mandatory for every new residential building in Flanders, for building permits issued since January, 1st 2016. This means that the features of the ventilation system as installed in the dwelling must be reported and that, in the EPB-report of the dwelling, these data must be used to justify the energy performance of the ventilation system. 

To enhance the properly functioning of the ventilation systems, a ventilation preliminary design has to be made before the physical building process is started. 

Statistical analysis of about 1,300 ductwork airtightness measurements in new French buildings: impacts of the type of ducts and ventilation systems

This paper summarizes the most recent results of the French database of ductwork airtightness. This database was created in 2016. It is fed through measurements performed by qualified testers according to a national scheme regarding ductwork. Measurements are mainly performed in building applying for the Effinergie + label which requires class A for ductwork airtightness. Therefore, results discuss in this paper only apply to the buildings of the database and cannot be generalized to all new buildings in France.

Preliminary analysis results of Spanish residential air leakage database

The air leakage impact on energy performance in buildings has already been broadly studied in USA, Canada and most European countries. However, there is a lack of knowledge in Mediterranean countries regarding airtightness. An extensive study has been carried out in order to characterize the envelope of the existing housing stock in Spain. Preliminary results of more than 401 dwellings tested are shown. The sample includes different typologies, year of construction and climate zones. Blower door tests were performed and thermal imaging was used to locate leakage paths.   

French database of building airtightness, statistical analyses of about 215,000 measurements: impacts of buildings characteristics and seasonal variations

The French database of building airtightness has been fed by measurement performed by qualified testers since 2006. In 2015 and 2016, the database was enriched by 63,409 and 65,958 measurements respectively, which is 74% more than in 2014, making the total number of measurements about 215,000. However, residential buildings (multi-family and single dwellings) account for almost all of measurements, only 4% of tests are performed in non-residential buildings. Indeed, since 2013 the French EP-regulation requires a limit for airtightness level for all new dwellings.

Quality framework for airtightness testing in the Flemish Region of Belgium – feedback after three years of experience

Since January 1st, 2018, airtightness testing has become implicitly mandatory for every new residential building in Flanders. There is no minimum requirement for airtightness. However, there is one for the global performance of the building envelope (S-level, taking into account thermal insulation, airtightness, solar gains, etc.), and a poor airtightness would jeopardize the chance to reach the required S-level.

6 years of envelope airtightness measurements performed by French certified operators: analyses of about 65,000 tests

Since 2000, the French EP-calculations have been considering thermal losses due to building envelope airtightness. The last two regulations (RT2000 and RT2005) had included a default value for airtightness and the possibility to use a better-than-default value with a mandatory justification of this value, especially for voluntary approaches such as the BBC-Effinergie label. In 2013, strengthening the airtightness has become a requirement of the current EP-regulation (RT2012).

Preliminary analysis of French buildings airtightness database

Pushed at first by the labels backed onto the 2005 French energy performance (EP) regulation, and later on by the 2012 energy performance regulation, which imposes envelope airtightness requirements for any new dwellings, and pulled by a growing interest for low-energy labels, an important market transformation is observed in France on envelope airtightness measurement.

Daylighting information throughout Europe using the SATEL-LIGHT and SODA internet servers

The Satel-Light Internet server provides to designers and engineers daylight information which was previously unavailable. It is based on a database of daylight and solar radiation, covering Western and Central Europe, which was produced as part of a European project called SATELLIGHT. This database has been computed from the images produced by the Meteosat satellite. Thus it has an excellent spatial resolution (every 5 km on average) and an excellent temporal resolution (every 30 mn).