Background information on the origin and rationale of the monthly method can be found in Annex I of the standard EN ISO 13790. It also contains more technical information concerning the content ...
Answered by Peter G. Schild, SINTEF Building & Infrastructure
Answered on 16 December 2009
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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 ...