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                ADVANCE CHUTES & RECYCLING
    
                
Accordion Dampers      
                
                                 
                                                          
                              
                                                                                                         
                                                                                           
Toll Free: 1-888-95-CHUTE (24883)
                                              advancechutes@ymail.com
                                                                                                                                                                                                                   
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Copyright 2009 Advance Chutes and Recycling, All rights reserved.
Shutters/Accordion-Style Dampers:
Saving the best for last, the biggest blunder in the chute industry is the specification of accordion-
style dampers at the base of a chute as a “labeled” discharge door. Some manufacturers go to great lengths to tout
these products on their websites and in their literature.  On the surface, it gives the impression that the
manufacturers using dampers these are brighter than the rest of the industry that does not, because they are
providing a rated product when their competitors are not.

This argument is so compelling that it has actually misled some of the major spec writing services into inadvertent
inaccuracies.  Not only has the use of these dampers been specified, it has been suggested that the shutters can be
used to create Direct Vertical Discharges on Linen Chutes.  From a functional standpoint, it’s not an unreasonable
alternative and this all appears legitimate because the shutter/damper is listed.  From the standpoint of Life Safety, it
eliminates labeled fire protection at the base of the linen chute.     

The dampers/shutters are approved under a UL category known as EMME. This is the UL category for the approval
of fire dampers to be used in Heating, Ventilating & Air-Conditioning (HVAC) systems.  EMME products are non-
egress and made for conditions for the passage of air only.  

All Chute-Related UL Product Testing is Classified under Category GSPR.

The use of a damper at the end of a chute is a violation of its product listing and voids the UL label.  UL’s
investigation of this practice has already resulted in one manufacturer removing website information related to this
inappropriate use.  Corrective actions are being discussed with the spec writing services.  

Because people sleep in buildings with chutes, because evacuation is not always possible, because doing chutes
according to current code has a marginal cost impact at best, the highest level of Life Safety possible should be the
minimum standard any of us should accept.  NFPA requires annual inspection of chutes and trash compactors and
for the AHJ to receive a copy of those inspection reports.
The use of a damper at the end of a chute is a violation of its product listing and voids the
UL label

UL category for the approval of fire dampers to be used in Heating, Ventilating &
Air-Conditioning (HVAC) systems
Fire Marshals Quarterly, is published by the International Fire Marshals Association (IFMA), which is
the Membership Section of the National Fire Protection Association (NFPA)
"Click Here to Read Article" (Pg. 37 - 41)
For Pricing Call
888-95-CHUTE