Best 641FA Specifications
WALL CAPS
SPECIFICATION SHEET
Model WC638
For 3¼" x 14" duct
•
Spring-loaded
•
backdraft damper
and bird screen
26 GA CRCQ Steel,
•
black finish
Model 639
For 3¼" x 10" duct
•
Spring-loaded backdraft
•
damper and bird screen
24 GA CRCQ Steel, black
•
electrically-bonded epoxy
finish
Do not use for dryer venting
•
Model 649
Same features as Model 639
•
.025 Aluminum - natural
•
finish
Model 647
For 7" round duct
•
Spring-loaded backdraft
•
damper and bird screen
.025 Aluminum - natural finish
•
Do not use for dryer venting
•
Model 843BL
For 6" round duct
•
Spring-loaded backdraft damper
•
and bird screen
22 GA CRCQ Steel, black
•
electrically-bonded epoxy finish
Attachment collar 1¼" long
•
Do not use for dryer venting
•
Model 641
Same features as Model 843BL
•
.025 Aluminum - natural finish
•
Model 641FA
Same features as Model 641
•
Without backdraft damper
•
Includes mesh screen
•
Intended for make-up air inlet
•
applications
Model 885BL
For 3" or 4" round
•
duct (4" to 3"
transition included)
Spring-loaded
•
backdraft damper
and bird screen
24 GA CRCQ Steel,
•
black electricallybonded epoxy finish
Do not use for dryer
•
venting
Broan-NuTone LLC Hartford, Wisconsin www.broan.com 800-558-1711
REFERENCE QTY. REMARKS Project
Location
Architect
Engineer
Contractor
Submitted by Date
31J 99042286R
Model 885AL
For 3" or 4" round duct (4" to 3" transition included)
•
Spring-loaded backdraft damper and bird screen
•
.025 Aluminum - natural finish
•
Do not use for dryer venting
•
Model 610FA
For 10" round duct
•
.025 Aluminum - natural
•
finish
Attachment collar 3-3/8"
•
long
Without backdraft damper
•
Includes mesh screen
•
Intended for make-up air
•
inlet applications
Model 643
For 8" round duct
•
Built-in backdraft damper
•
.025 Aluminum - natural
•
finish
Attachment collar 3-3/8"
•
long
Model 643FA
Same features as Model
•
643
Without backdraft damper
•
Includes mesh screen
•
Intended for make-up air
•
inlet applications
Model 613
For 12" round duct
•
High capacity
•
Built-in backdraft
•
damper and bird
screen
.025 Aluminum -
•
natural finish
Model 441
Gravity dampers
•
Collar with bird screen for
•
attaching 10" round duct
24 GA CRCQ steel
•
construction with
aluminum louvers
Model 450 Flexible Wall
Ducting Kit
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 WC650
White wall cap for 4”
•
round duct - includes 4
mounting screws
Engineered resin
•
material for impact and
UV resistance
Weighted backdraft
•
damper guards against
wind, birds or lint build-up
4” diameter metal duct
•
connector
Model 646
For 6" round duct
•
Polymeric construction - white finish
•
Model WVK2A Flexible Wall Ducting Kit
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
Duct conforms to UL181 Class 1 air
•
connector requirements
Do not use for dryer venting
•
Broan-NuTone LLC Hartford, Wisconsin www.broan.com 800-558-1711
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