Specification Sheet

Broan-NuTone LLC Hartford, Wisconsin www.broan.com 800-558-1711
Model 643
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For 8" round duct
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Built-in backdraft damper
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.025 Aluminum - natural finish
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Attachment collar 3-3/8" long
Model 643FA
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Same features as Model 643
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Without backdraft damper
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Intended for make-up air inlet
applications
Model 613
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For 12" round duct
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High capacity
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Built-in backdraft damper and bird screen
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.025 Aluminum - natural finish
Model 441
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Gravity dampers
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Collar with bird screen for attaching 10" round duct
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24 GA CRCQ steel construction with aluminum louvers
Model 646
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For 6" round duct
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Polymeric construction - white finish
Model 645
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For 3" round duct
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Polymeric construction - white finish
Model 450 Flexible Wall Ducting Kit
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Includes 5 ft. of 4", flexible, vinyl ducting, 4" diameter
metal duct connector, 2 duct clamps, 4" to 3" reducer and
a polymeric louvered wall vent
Model 885AL
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For 3" or 4" round duct (4" to 3" transition included)
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Spring-loaded backdraft damper and bird screen
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.025 Aluminum - natural finish
Model WVK2A Flexible Wall Ducting Kit
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Includes 5 ft. of 4", flexible, 2-ply metallic
laminate ducting, 10" long 4" diameter
metal duct, 2 duct clamps, 4" to 3"
reducer, an engineered resin material
wall vent, and mounting screws
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Duct conforms to UL181 Class 1 air
connector requirements
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Not recommended for dryer venting