BUILDUP

The European Portal For Energy Efficiency In Buildings

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Answered by Peter G. Schild, SINTEF Building & Infrastructure
Answered on 16 December 2009
Visits: 2910 visits
In general, yes. For more information you can check-out the Information Paper P187 “Duct System Air Leakage — How Scandinavia tackled the problem” by P.G.Schild & J.Railio, on the BUILDUP website
Answered by Peter G. Schild, SINTEF Building & Infrastructure
Answered on 16 December 2009
Visits: 3735 visits
A good starting point is the paper "stimulating better envelope and ductwork airtightness with EPBD" by Carrié et al., at the AIVC 2008 conference (
Answered by Peter G. Schild, SINTEF Building & Infrastructure
Answered on 16 December 2009
Visits: 3896 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: 3589 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: 3231 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 ...

Answered by Peter G. Schild, SINTEF Building & Infrastructure
Answered on 16 December 2009
Visits: 5300 visits
It is important to use the correct type of screw or rivet. Avoid screws with a wide drill tip (which drill a hole in the duct wall) and blind pop rivets (which are not airtight because the inner ...
Answered by Peter G. Schild, SINTEF Building & Infrastructure
Answered on 16 December 2009
Language: English
Visits: 2496 visits

In part. Leakage testing of duct systems, by means of a pressure test, is a very effective way of achieving more airtight duct systems.

Language: English
Visits: 3184 visits

This is defined in EN 13829, § 6.1.2. All exterior surfaces, plus floors, ceiling and walls to neighbouring apartments are taken into account.
However, other assumptions are used in some ...

Measurements usually show that light (e.g., timber-frame or steel) constructions are leakier than massive construction, but this is not bound to be. In fact, PassivHaus houses are often light ...

Language: English
Visits: 3100 visits

To our knowledge, only two low-energy labels include a minimum requirement for low-energy buildings:
- the PassivHaus standard (

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