S-2.1, r. 13 - Regulation respecting occupational health and safety

Full text
102. Natural ventilation: In any establishment where overall ventilation is provided by natural means, it shall be obtained by means of windows, shutters or vents having a ventilation area at least equal to the percentage of floor area indicated in the following table, according to the type of establishment in question:

Type of establishment Percentage of floor area

Laboratories and office buildings 5%

Any other establishment 2%
For the purposes of this section, floor area does not include stairwells and other vertical empty spaces.
O.C. 885-2001, s. 102.