Model FD-300
Static Rated FIRE DAMPERS
Ultra Thin Construction
3 Hour Fire Resistance Rating
Model FD-300 meets the requirements for fire dampers
established by:
National Fire Protection Association
(NFPA Standards 80, 90A & 101)
Underwriters Laboratories Standard 555 (Listing #R-13317)
IBC International Building Codes
New York City (MEA listing #260-91-M)
California State Fire Marshall
(Listing #3225-981:102 for use in walls)
APPLICATION
Model FD-300 is approved for use in walls and partitions
with fire resistance ratings of 3 hours or more. This model
carries a 3 hour UL fire damper label. UL 555 classifies
static rated fire dampers for use in HVAC systems that are
automatically shut down in the event of fire .
RATINGS
UL555 Fire Resistance Rating
Fire Rating: 3 hours
CONSTRUCTION
Galvanized steel (in gauges required by UL listing R-13317)
INSTALLATION
All fire damper installations require the use of sleeves,
angles and methods described in Greenheck Fire Damper
Installation Instructions #452763, included with every
damper shipment. Sleeves can be field fabricated or factory
furnished as a complete damper/sleeve assembly. See
Factory Sleeve Option below for details.
STANDARD FEATURES
• Fusible links - 165°F (74°C) standard, 212°F (100°C) and
286°F (141°C) available
• Vertical mount
OPTIONAL FEATURES
• Security bars
• One piece retaining angles (POC)
• Transitions (B & B2)
FACTORY SLEEVE OPTION
FD-300 Fire Dampers are available in factory furnished sleeves. Sleeves are galvanized
steel and are available in 10 thru 20 ga. (1mm - 3.5mm) thicknesses and lengths up to
36 in. (914mm).
“K” dimension specifies location of damper within the sleeve. Minimum is 4 in.
(102mm), maximum is “L” less 4 in. (102mm), which allows for mounting angle
installation and duct connection at each end of sleeve. If “K” dimension is not
specified, it will be provided as one half of “L” dimension (damper centered in sleeve).
Note: If using access doors, the doors should be installed on the "K" side of the
damper.
H*
K
Damper
Location
L
Overall Sleeve Length
W*
C
L Damper Frame
Sleeve
Damper
* These dimensions are furnished approximately 1/4 in. (6mm) undersize
TYPE A
W*
H*
O*
H*
W*
TYPE B
VERTICAL MOUNT
ONLY
VERTICAL MOUNT
ONLY
1 1/2 in.
1 1/2 in.
“UL CLASSIFIED (see complete marking on product)”
“UL CLASSIFIED to Canadian safety standards (see
complete marking on product)”
Standard 555 (Listing #R13317)
When sealed option is selected, B transitions
will need to be field sealed in the area where
duct to sleeve connection is made.
Type B corner prole
Type B with sleeve Installation instructions available at www. greenheck.com
