This standard applies to ventilation and air-conditioning for garages. Garages are buildings, or parts of buildings, which are dedicated to the parking of motor vehicles. Medium-sized (100 square metres, up to 1000 square metres) and large garages (above 1000 square metres) with a closed building envelope require sufficient ventilation to ensure operation without health hazards. The application of this standard ensures that pollutant concentrations do not exceed the limits which are deemed acceptable. The described required protection is intended for short-term exposure only. The standard does not apply to automated garages, open garages and rooms where ext