Iris-M motorized dampers precisely measure minimum and maximum airflows within Â±5 percent by using pressure ports, and are altered by means of the actuator adjustment screws. The damper varies airflow in response to a 0-10 VDC or 4-20 mA signal to precisely control temperature, humidity, or the ventilation rate. For duct cleaning, an external switch retracts the damper fully. Made from galvanized steel with neoprene seals, six sizes fit standard ducts from 4 to 12 inches in diameter. Features include capacities of 15 to 4,000 cfm and fingertip control with adjustable set points.
Continental Fan Manufacturing Inc., 203 Eggert Rd., Buffalo, NY 14215; 800-779-4021 or 716-842-0670; 716-842-0611 (fax); firstname.lastname@example.org; www.continentalfan.com