E-1.1, r. 1 - Regulation respecting energy conservation in new buildings

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81. Glazing that separates heated space from unheated space or the outside air must conform to the requirements of Division 3 of Chapter 4, with the exception of section 63 which does not apply. However, an exterior door protected by an enclosed unheated vestibule or a revolving door, may be equipped with single glazing.
O.C. 89-83, s. 81.