Ventilation shall be considered satisfactory when the following conditions are met:
Rooms are reasonably free of undesirable odors and vapors.
Processing and packaging rooms are reasonably free of dust.
There is no evidence of excessive condensation on walls, ceilings, or equipment. Condensate, when found, is considered excessive when it drips or runs onto product or equipment product contact surfaces.
Areas where steam or hot air vapors are predominant are effectively exhaust-ventilated.
Cooling and air-conditioning units (except those which are a part of the equipment) are equipped with efficient filtering devices, the filters of which are frequently cleaned or changed.
Windows opening into any product area from the outside atmosphere are equipped with screens not coarser than 14 mesh during the time when flies or other flying insects may be present.
Exhaust fan vents are equipped with screens or self-closing louvers.
September 23, 2013