The IRIS-M Motorized Dampers measure minimum and maximum airflows within plus or minus 5 percent by using pressure ports, and altered by means of the actuator adjustment screws. An external switch retracts the damper fully for duct cleaning. Features include automatic measurement and control of airflow; control of temperature, humidity and ventilation rates; interlocking galvanized steel plate construction.

Continental Fan Manufacturing Inc., 203 Eggert Road, Buffalo, NY 14215; (716) 842-0670; fax (716) 842-0611; www.continentalfan.com.