04/2014 US K5 – 2.1 – 10
Application
– The VFL-ER (exhaust register) and VFL-SR
(supply register) are designed for in-wall
installation
– Commonly used to eliminate thermal stack
effect and regulate high rise building pressure
Nominal sizes
– 4", 5", 6", 8" and 10"
Nominal register sizes
– See table page 10 for standard sizes
– Other register heights, widths and depths
available upon request
Special features
– Exhaust or supply orientation
– Fire damper assembly by TROX is UL listed
and in accordance with NFPA-90A
– VFL secured by brackets and sealed to register
– Register can be supplied with aluminum grille
(by TROX - see details below) or customized
for grille by others
Materials and surfaces
– Adaptor made of 20 ga. galvanized steel
– Natural finish
Description
Volume ow limiter
Type VFL (ER & SR) with
re damper
FIRE
WALL
M
OPPOSITE
SHAFT
WALL
TROX grille dimensions
Dimensional drawing of VFL - ER and - SR exhaust register with fire damper
A
¾″ TYP
B
L
A
ØD
5½״
For measurements, reference dimensional chart p. 9
⅝″
N + 2
N − ⅜″
N
1¼″ TYP
1¼″
*N = nominal duct size
*
VFL
Exhaust Register with Fire Damper
Accessories
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