The 7th International BUILDAIR-Symposium´s topic this year "Building and Ductwork Air Tightness in Practice“ will be addressed to experienced practitioners as well as to beginners. As usual the ...
The Web Event "Envelope airtightness measurement method and equipment - Building preparation and uncertainty estimation" will take place on 17 September 2010, 08.30-10.30 (Brussels ...
The 5th International BUILDAIR-Symposium ”Building and Ductwork Air-tightness“ takes place on October 21-22 2010 at the Danish Technical University in Copenhagen/Lyngby, Denmark.
This international workshop aims to give a good overview of all the issues involved in building airtightness, with specific attention to planning aspects, execution and evaluation. Attention will ...
Answered by Peter G. Schild, SINTEF Building & Infrastructure
Answered on 16 December 2009
Visits: 2826 visits
Although this seems to be true, this is a dangerous generalization. There are many factors that govern airtighness of round ductwork, including roundness (any slight ovality can cause leakage at ...
Answered by Peter G. Schild, SINTEF Building & Infrastructure
Answered on 16 December 2009
Visits: 2861 visits
This is generally not possible. In systems with good airtightness, the leakage flow rates are too small for one to be able to accurately measure the flow rate over the fan.
Answered by Peter G. Schild, SINTEF Building & Infrastructure
Answered on 16 December 2009
Visits: 2908 visits
It is not presently mentioned in CEN standards. Other countries might be using the same default level as France in their energy performance calculation standards, but there is no reason to ...
Answered by Peter G. Schild, SINTEF Building & Infrastructure
Answered on 16 December 2009
Visits: 2603 visits
Sweden does not use its building regulations to impose its strict requirements on ductwork airtightness. Rather it is a voluntary trade standard (the AMA VVS specifications) that has driven the ...
Answered by Peter G. Schild, SINTEF Building & Infrastructure
Answered on 16 December 2009
Visits: 2333 visits
The reason for this is twofold:
(1) When one uses only one test pressure, then the test results can be expressed with just one number, the “flow coefficient”. This is very simple and ...
