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Application

The grille option for Fire, Combination Fire Smoke and Smoke Dampers provides mounting tabs on the sleeve to 
ease installation of grilles in the field. The tabs are made out of 20 gauge (1mm) galvanized steel (3/4 inch x 2 in. 
long [19mm x 51mm]) with .149 in. (3.8mm) diameter hole for fastening of grille. The flanges are concealed when 
the grille is installed. The grille option is limited to 48 in. x 48 in. (1219mm x 1219mm).

Grille Tab Option for Fire, Smoke, and 

Combination Fire Smoke Dampers

DFD & FD Series

FSD Series

SMD series

SLEEVE

 LENG

TH

WIDTH

"K" DIM

1/2 

HEIGHT

HEIGHT

BOTTOM

TOP

FD/DFD W/TABS

SLEEVE LENGTH

WIDTH

"K" DIM

1/2 

HEIGHT

HEIGHT

BOTTOM

TOP

FD/DFD W/TABS

 2 in.

3/4 in.

Refer to:
‘Installation Instructions for Single Side 
Retaining Angle Supplement (Part #462099) for 
additional details. 

Copyright © 2008 Greenheck Fan Corporation 

Grille option for Fire, Combination Fire Smoke,  

Smoke Dampers  Rev. 3 July 2008

Curtain style FD/DFD series

SLEEVE LENGTH

WIDTH

"A" DIM

1/2 

HEIGHT

HEIGHT

BOTTOM

TOP

FD/DFD W/TABS

Multi-blade DFD series,

FSD series & SMD series

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