These heavy duty variable speed exhaust combines a heavy extruded aluminum shutter with a high performance motor and blade series. these motors are designed to work in the harshest environment. the painted intake guard is corrosion resistant, safe and strong. the heavy aluminum blade is quiet, balanced and engineered to move maximum air. the matching designed motor, blade combination makes this fan series very energy efficient. included with 9' cord so no electrician is required.Features:totally assembledtotally enclosed maintenance free motorcorrosion resistant aluminum shutter with tie bar to reduce shutter flapping and opening on windy dayssafety grill on intake side meets osha standards. fan must be mounted 7' above ground level on the exhaust side.Motor Features:csa/csa-us approved50/60 hzf class insulatedfollow nema standards either 48 or 56 framedupont nomex insulationrotors have been balanced to reduce noise vibration and prolong lifemotor enclosures have been machined to csa/csa-us for an ambient temperature of 40°c but will stand up to 65°c (149°f)copper windings rated at h classbearing specifications - 40°c to 140v ccapacitor rating 450vac, 10,000 hours for extended lifesilicon steel rotors and statorsApplications:improve inside air qualitydesigned for agricultural, horticultural, factories, warehouses, garages, attics and restaurantsremove and control unwanted condensationexhaust obnoxious fumesexhaust excessive heat* rough in opening = 24.5 inch square
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