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

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60. For the purpose of this Regulation, the enclosure of any unheated enclosed space separated from a heated space by glazing, such as a sun porch, veranda or vestibule may be considered to offer a thermal resistance of 0.16 m2 • °C/W.
O.C. 89-83, s. 60.