Skip to Content Skip to Navigation
!
Browser upgrade recommended: Improve your Grainger.ca experience by upgrading your browser to Edge or Chrome. Learn more about our supported browsers.
Back to Top
Email
Print
ALUMINUM SPRING BKDRFT DAMPER, FOR 20 IN FAN, FOR 20 IN NOMINAL DUCT DIA, SINGLE PANEL

ALUMINUM SPRING BKDRFT DAMPER, FOR 20 IN FAN, FOR 20 IN NOMINAL DUCT DIA, SINGLE PANEL

DAYTON

ALUMINUM SPRING BKDRFT DAMPER, FOR 20 IN FAN, FOR 20 IN NOMINAL DUCT DIA, SINGLE PANEL close
close x

images.360.info.textHead1 360° images.360.info.textHead2

  1. Rotate: Use top-to-bottom, side-to-side by use of mouse arrow.
  2. Zoom In: Double click on image.
  3. Zoom Out/Reset: Put photo at full zoom & then double click.
Roll over image to zoom.
Available only while supplies last. Quantities may be limited. The Item is FINAL SALE.
ALUMINUM SPRING BKDRFT DAMPER, FOR 20 IN FAN, FOR 20 IN NOMINAL DUCT DIA, SINGLE PANEL

ALUMINUM SPRING BKDRFT DAMPER, FOR 20 IN FAN, FOR 20 IN NOMINAL DUCT DIA, SINGLE PANEL

DAYTON

Web Price If you have a User ID, sign in to view your account pricing. Your price may be different from the price displayed. : $62.41 / EACH

EHC: EHC :

Compliance and Restrictions

  • None

Availability
Availability
Availability Service is temporarily down Available for pickup on: To view Availability, please select a Branch
Availability Service is temporarily down Expected to arrive on: To view Availability for another location, please enter postal code below Availability dates may vary based on the assortment of product in the cart and is not final until you complete your order.
Select a Branch

Selected Branch


Cancel
Please select pick up location
Apply
https://catalogue.grainger.ca/?hybris=true
  • Item # WWG3HHL6
  • Mfr. Model # 3HHL6
  • UNSPSC # 40101504
  • CATALOGUE PAGE # 1859
  • Shipping Weight 4.75 lbs

Product Details

This 411 series manual damper includes pre-punched conduit hole knock-out, felted edges for quiet operation, is made of galvanized steel, and it measures 19¾ inch width, 19¾ inch height, 4½ inch length. This manual damper is ceiling/wall mountable.

Technical Specs

  • ItemManual Damper
  • For Nominal Duct Diameter20 in
  • Number of Panels1
  • Overall Height19 3/4 in
  • Rough Opening ShapeSquare
  • For Duct ShapeSquare
  • Overall Width19 3/4 in
  • Overall Length4 1/2 in
  • Rough Opening Length20 in
  • Rough Opening Width20 in
  • Damper TypeDynamic
  • Blade TypeFlat Blade
  • Closure TypeSpring
  • Closure Velocity Rating2,000 fpm
  • Switch ActionNormally Closed
  • IncludesPre-Punched Conduit Hole Knock-Out, Felted Edges for Quiet Operation
  • Flange TypeNone
  • Airflow DirectionHorizontal, Vertical
  • Series411
  • Bushing MaterialNylon
  • Damper FinishMill Finish
  • Damper Application Backdraft
  • Frame Material Galvanized Steel
  • Maximum Air Velocity 2,000 fpm
  • Rough Opening Diameter 20 in
  • Fits Fan Diameter 20 in
  • Free Area 2.5 sq ft
  • Frame Material Thickness 20 ga
  • Frame Depth 2 in
  • Maximum Pressure 1 in wc
  • Blade Material Aluminum
  • Single Acting/Double Acting Single Acting
  • Maximum Ambient Temperature 180 Degrees F
  • Blade Orientation Parallel Blades
  • Frame Less Flange 19.75 sq in
  • Counterbalanced Not Counterbalanced
  • Mounting Location Ceiling, Wall
  • Blade Seal Material Felt
  • Opening Type Motorized
  • Mounting Position Horizontal, Vertical
  • Blade Material Thickness 26 ga
  • Minimum Ambient Temperature -40 Degrees F
  • Country of Origin United States (subject to change)

Compliance and Restrictions

  • None

SDS Document Not Found

For assistance please contact the SDS Coordinator by email at productcompliance@grainger.ca

Accessories

Add to Order List

X

Your items were added

Your items were added to some lists

Max quantity exceeded. The item could not be added to the following List(s)

No Existing List Found. Please Create New List below.

Your list has been created

Please select a list