S-2.1, r. 4 - Safety Code for the construction industry

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3.25.5. Closed operation cabin: Where the worker is isolated from the source of the emission of dust from the materials presumed to contain or containing crystalline silica by the use of a closed operation cabin of a mobile machine, the cabin must have the following characteristics:
(a)  the air intake in the cabin must be filtered by a high-efficiency filter;
(b)  positive pressure must be maintained;
(c)  a heating and air-conditioning system must be included;
(d)  the door and window joints must be kept in good condition to ensure they are sealed.
O.C. 820-2023, s. 4.