An employer shall cause every room, cabinet or enclosure contemplated in subregulation (2) to be fitted with an
efficient intake and exhaust ventilation system to remove any vapour therefrom and to prevent its re-circulation in
a manner which may lead to the contamination of any other workplace or the creation of a fire or explosion hazard: Provided that, notwithstanding any other provision of this regulation, an employer shall provide every
employee doing spraying with a respirator, mask or breathing apparatus of a type approved by the chief inspector, and that any such employee shall while spraying use such apparatus provided to him.