(1) Performance grades for windows, doors and skylights shall be selected according to CSA A440S1, “Canadian Supplement to AAMA/WDMA/CSA 101/I.S.2/A440-11, NAFS - North American Fenestration Standard/Specification for Windows, Doors, and Skylights” so as to be appropriate for the conditions and geographic location in which the window, door or skylight will be installed.
(2) Windows, doors and skylights shall conform to the performance grades selected under Sentence (1) when tested in accordance with AAMA/WDMA/CSA 101/I.S.2/A440, “NAFS - North American Fenestration Standard/Specification for Windows, Doors, and Skylights”.
(3) The minimum level of performance required for windows, doors and skylights shall be that of the Performance Class R.
(4) Exterior wood doors shall conform to CAN/CSA-O132.2 Series, “Wood Flush Doors” and shall have legibly indicated on them,
(a) the name of the manufacturer,
(b) the standard to which they were produced, and
(c) that they are of an exterior type.