Since 2008, every measurement of building envelope airtightness performed in France in order to justify an airtightness value for EP-calculation has to be performed by a qualified operator. With the introduction of the French BBC-Effinergie label in 2007, which imposed a limit value for residential buildings airtightness, and then with the application of the current French EP-regulation (RT2012) which imposes those limits to all new residential buildings, the number of qualified operators has been increasing until almost 1,000 in 2015. Each year, those qualified operators fill a database that now gathers information on about 90,000 airtightness measurements on residential and non-residential buildings.Cerema is in charge of this database and performed each year analyses of this data. It includes 39 fields about building general information (owner, location, use, year of the construction, year of the rehabilitation), special requirements (label, certification), building main characteristics (main material, constructional type, insulation, ventilation system, heating system), measurement protocol (operator, date of measurement, measurement device, time of measurement, method), measurement input data (envelope area, floor area, volume), measurement results (CL, n, qa4, n50, uncertainties) and classification of the leaks (46 categories).In the first part, this paper presents an overview of the database, including data about main material of the buildings, the ventilation system and the insulation. The second part proposes first results concerning the evaluation of the impact of the leaks distribution on the measurement result. The next part of this paper deals with the impact of the season of measurement on the measured airtightness for several French regions with different climates, for wood constructions, concrete construction and brick construction. The last part of this paper presents first analyses on the uncertainties of the measurement result and the flow exponent n value for single-family houses built according to the RT2012.
Citation: ASHRAE and AIVC IAQ 2016 Conf
Product Details
- Published:
- 2016
- Number of Pages:
- 8
- Units of Measure:
- Dual
- File Size:
- 1 file , 1.5 MB
- Product Code(s):
- D-2016IAQ-32
