Duct-BoosterÂ® duct fans are designed to boost airflow and increase comfort in hard-to-heat or hard-to-cool rooms. Also, they can exhaust unwanted heat, humidity, odors, or other airborne contaminants. Sizes for residential and commercial applications are available. The fans can be installed in metal and flex duct. Models EF-6, EF-8, EF-10, EF-12, and EF-14 can be used as exhaust or air intake fans. Features include variable-speed adjustability and manual or automatic operation. Speed and Duct Airstat operating controls are optional.
Tjernlund Products Inc., 1601 Ninth St., White Bear Lake, MN 55110-6794; 651-426-2993 or 800-255-4208; 651-426-9547 (fax); www.tjernlund.com.