CALCULATION OF AIR CHANGE, NUMBER OF VENTILATORS ETC.   A. THE NUMBER OF AIR CHANGE required is as per the ventilation schedule below. Nevertheless, other factor such as traffic flow, number of ventilation outlets/inlets (doors, windows) and whether area is enclosed, partial enclosure or completely sealed, need to be taken into account. E.g. There are many types of warehouses. Warehouses with doors opened most of the time. Warehouses with heavy flow of traffic like forklifts, cranes, human traffic, etc. Warehouses not used as workstations but usually enclosed. In situations like the above, kindly contact our Technical Science Department to take some measurement (e.g.: humidity or heat etc.) and recommend the number of air change required. VENTILATION SCHEDULE (No. of Air Change per Hour) TYPE OF BUILDING DETAILS AIR CHANGE PER HOUR CFM PER PERSON SCHOOLS LABORATORY GYMNASIUM CLASSROOM TOILET 6 10-30 8-20 1. 5 Per sq. mtr. 40     HOSPITAL CLINIC RESTAURANT BOILER ROOM KITCHEN TOILET LAUNDRY 6 6-20 20 10-30 8-20 10-60 10 CFM HOUSEHOLD KITCHEN LIVING ROOM DINING ROOM BEDROOMS 10-30 6 6 5   FACTORY PAINTING ROOM CONDENSER ROOM DYNAMO ROOM AND SUBSTATION 20 20 15   STORAGE WAREHOUSE 12   Note: Some of the air changes are as per recommendations by Warren Viesman : Ventilation Control of Odor Annals of the 6 New York Academy of Sciences, vol 116, Art 12)