Adjustable drive fans are for exhausting corrosive fumes from institutional and industrial laboratory hoods. Four basic sizes with forward-curved wheels and two sizes with backward-inclined fan wheels are available. Capacities range from 250 to 4,000 CFM at static pressure to 2 1/2-inches WG. Fume hood fan catalog No. 26001 lists electrical and mechanical specifications; and provides performance charts, dimensions, and photographs.
DF Fan Services Inc., 495 Wegner Dr., West Chicago, IL 60185.