C-24.2, r. 32 - Regulation respecting safety standards for road vehicles

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71. The heating and defrosting system shall comply with the following standards:
(1)  the radiator and the blower and vents designed to heat the passenger compartment and defrost the windows shall be adequate;
(2)  enough air shall be blown onto the windshield where intended by the manufacturer and onto the side windows if the vehicle has vents for that purpose; an auxiliary fan may be used; and
(3)  if part of the heating liquid piping is visible from inside, it shall not be cut, cracked, worn or leak.
O.C. 1483-98, s. 71.