8.157. Petroleum equipment may be installed in or near a building housing a service station or service centre if(1) the hazardous areas listed in Schedule II are separated from any room housing a solid or liquid fuel or gas heating appliance by walls having a fire-resistance rating of at least one hour within the meaning of Chapter I;
(2) the room containing such heating appliance(a) does not have an opening less than 2.5 m from the floor; or
(b) is not used to store a Class 1 or Class 2 petroleum product or as a service area where work on the fuel supply system of internal combustion engines or any dispensing, transferring or handling of Class 1 petroleum products is being performed; the bottom of the combustion chamber must be at least 500 mm above the floor and the heating appliance must be protected from impact;
(3) the combustion air necessary for the appliance comes from outside the building;
(4) the return air intake of a forced-air heating appliance is at least 1.25 m from the floor if it is located in a room listed as a hazardous area in Schedule II; and
(5) the burner and combustion chamber of the equipment are at least 2.5 m from the floor, in an area used for dispensing, transferring or handling Class 1 petroleum products.