This line of propeller upblast roof exhaust fans, which discharge contaminants up and away from the building, has been enhanced with a new size and expanded performance, says the company. The addition of a Size 20 belt-drive model allows for proper operation of the butterfly dampers at reduced air volumes, the company says. This size is available with the motor in the airstream or outside it for high-temperature applications. Three performance levels are offered based on maximum horsepower, ensuring the right fan for every performance point, says the manufacturer.
Greenheck, P.O. Box 410, Schofield, WI 54476-0410; 715-359-6171; 715-355-2399 (fax); www.greenheck.com (website).