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

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84. Any door that separates heated space from the outside air must be protected by an enclosed vestibule, designed so that it can be crossed without having to open the interior door and the exterior door at the same time, except for:
(1)  a revolving door;
(2)  a door used primarily to facilitate vehicular movement or material handling;
(3)  an exit door used exclusively for evacuation;
(4)  a door giving direct access to an enclosed space measuring not more than 150 m2.
O.C. 89-83, s. 84.