Intent 1:

To supersede the requirement of Sentence (1) and allow a higher air leakage rate for main entry exterior doors, on the basis that their cumulative area is limited and, as such, their impact on overall air leakage is minimal.

Intent 2:

To exempt main entry exterior doors that do not separate dissimilar environments from the air leakage rate requirement of Sentence (1), on the basis that air leakage under these circumstances does not result in thermal loss.

Intent 3:

To direct Code users to Article for the calculation procedures for gross wall area.

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