School Industrial Technology (Shop) Indoor Air Quality (IAQ) issues examined
These occupational training areas incorporate heat and contaminant producing machinery (tools), welding apparatuses and curing kilns. The designer should consult with facility planning authorities to assure proper airflow distribution is maintained. Airborne contaminants are produced from woodworking, glues, welding fumes, oils and paints. The average occupancy is 30 people per 1,000 square feet. Due to the nature of the contaminants produced, air quality is best addressed by a combination of outside air, filtration and possibly dust collection equipment. The minimum level of air filtration, for protection of equipment and occupants is a 30- 35% dust spot efficiency filter as defined by ASHRAE Standard 52.1-1992. These facilities have special exhaust requirements for welding, soldering, auto repair and paint booths. In addition, a dust collection system is sometimes prescribed and the clean collected air may be Camfil Farr Tools For Schools - Filtration for IAQ Page 6 of 8 returned to the space. Industrial shops have a high sensible load due to the operation of the shop equipment. Since these areas are rarely air conditioned, the use of ventilation air at 20 CFM per occupant12 is recommended.
