UL Product Selection Guide
Combination Fire/Smoke dampers UL HOUR RATING AMCA RATING MODEL
MAX VELOCITY (fpm)
MAX PRESSURE (in.wg)
MAX ASSEMBLY TEMP (°F)
LEAKAGE CLASS
PG
BLADE TYPE
MATERIAL
STANDARD FSD-141 FSD-142 FSD-143 FSD-151 FSD-152 FSD-151-SS FSD-152-SS
3 3 3 4 4 4 4 4 4 3 3 3 4 4 5 5 5 5 5 5 5 5 5 5 5
AIR AIR – AIR AIR AIR AIR AIR AIR AIR AIR AIR AIR AIR
1½ 1½ 1½ 1½ 1½ 1½ 1½ 1½ 1½
1 2 3 1 2 1 2 1 2 1 2 3 1 2 1 2 3 1 2 1 2 1 2 1 2
TRIPLE-V TRIPLE-V TRIPLE-V AIRFOIL AIRFOIL
GALV GALV/SS GALV/SS
2000 2000 2000 4000 4000 2000 2000 2000 4000 2000 2000 2000 4000 4000 2000 2000 2000 4000 4000 2000 2000 2000 2000 4000 4000
4 4 4 8 8 4 4 4 4 4 4 4 8 8 4 4 4 8 8 4 4 4 4 8 8
350 350 350 350 350 350 350 250 250 350 350 350 350 350 350 350 350 350 350 350 350 350 350 350 350
GALV GALV
STAINLESS AIRFOIL STAINLESS AIRFOIL
STAINLESS STAINLESS
VERT AIRFOIL VERT AIRFOIL
GALV GALV
FSD-151V FSD-152V
3 3 3 3 3 FSD-341 FSD-342 FSD-343 FSD-351 FSD-352 ACTUATOR IN THE AIRSTREAM – OUT-OF-PARTITION
TRIPLE-V TRIPLE-V TRIPLE-V AIRFOIL AIRFOIL TRIPLE-V TRIPLE-V TRIPLE-V AIRFOIL AIRFOIL TRIPLE-V TRIPLE-V TRIPLE-V TRIPLE-V AIRFOIL AIRFOIL
GALV/SS GALV/SS GALV/SS
GALV GALV
– – – – – – – – – – – – FSD-141-SP FSD-142-SP FSD-151-SP FSD-152-SP TRUE ROUND FSD-125R TUNNEL TYPE CORRIDOR CEILING FSD-141-OP FSD-142-OP FSD-143-OP FSD-151-OP FSD-152-OP FSD-171-OP FSD-172-OP SIDE PANEL – FRONT/ACCESS
1½ 1½ 1½ 1½ 1½ 1½ 1½ 1½ 1½ 1½ 1½
GALV GALV GALV GALV GALV GALV GALV GALV GALV GALV GALV
6
1½
1
ROUND
GALV/SS
3000
4
350
6 6 5 5
– – – –
1½* 1½* 1½* 1½*
1 2 1 2
TRIPLE-V TRIPLE-V TRIPLE-V TRIPLE-V
GALV GALV GALV GALV
2000 2000 2000 2000
4 4 4 4
350 350 350 350
FSD-171 FSD-172
FSD-171-OP FSD-172-OP
* Tunnel Type Corridor ceiling installation has 1 hr rating
Smoke dampers
MAX DYNAMIC CLOSURE VELOCITY (fpm)
UL HOUR RATING
MAX PRESSURE (in.wg)
UL555S LEAKAGE CLASS
MAX TEMP (°F)
HORIZ FLOORS
VERT WALLS
MODEL
CEILING
FIRE
PG
BLADE TYPE
MATERIAL
STANDARD SD-141 SD-142 SD-143 SD-151 SD-152 SD-151-V SD-152-V
9 9 9 9 9 9 9 9 9 9
– – – – – – – – – –
– – – – – – – – – –
TRIPLE-V TRIPLE-V TRIPLE-V AIRFOIL AIRFOIL
GALV GALV/SS GALV/SS
2000 2000 2000 4000 4000
4 4 4 8 8 4 4 4 4 4
350 350 350 350 350 250 250 350 350 250
1 2 3 1 2 1 2 1 2 1
2000 2000 2000 4000 4000 2000 4000 2000 2000 3000
GALV GALV GALV GALV
VERT AIRFOIL VERT AIRFOIL
– –
ROUND SD-151-SS SD-152-SS SD-93 TRUE ROUND SD-25R CEILING RADIATION/SMOKE
STAINLESS AIRFOIL STAINLESS AIRFOIL ALUMINUM AIRFOIL
STAINLESS STAINLESS GALV/ALUM
2000 2000 –
9
–
–
GALV/SS
3000
4
350
1
3000
9 9
CFS-171 CFS-172
3* 3*
1½ 1½
TRIPLE-V TRIPLE-V
GALV GALV
2000 2000
4 4
350 350
1 2
– –
* Tunnel Type Corridor ceiling installation has 1 hr rating
UL Product Selection Guide
Ceiling radiation damperS
UL HOUR RATING
MODEL
PG
BLADE TYPE
MATERIAL
STANDARD CFD-15 CFD-15-LP CFD-20 TRUE ROUND CFD-15R WOOD TRUSS SYSTEMS CFD-521
10 10 10
BUTTERFLY LOW PROFILE BUTTERFLY FOLDED CURTAIN
GALV GALV GALV
3 3 3
10
ROUND BUTTERFLY
GALV
3
10 10 10 10 10 10
BUTTERFLY BUTTERFLY – 90° PLENUM BUTTERFLY – R-6.3 OR 8.0 INSULATED OUTLET BOX BUTTERFLY – R-6.5 OR 8.7 INSULATED DUCT BOARD OUTLET BOX BUTTERFLY BUTTERFLY – FIELD INSTALLED 90° PLENUM
GALV GALV GALV GALV GALV GALV
1 1 1 1 1 1
1 CFD-521-90 CFD-521-BT CFD-521-IP CFD-521-NP CFD-521-NP90 COLD FORMED STEEL TRUSS SYSTEMS CFD-521-ST
10
BUTTERFLY – R-6.5 OR 8.7 INSULATED DUCT BOARD OUTLET BOX
GALV
FIRe dampers
MAX DYNAMIC CLOSURE VELOCITY (fpm)
MAX PRESSURE (in.wg)
STATIC DYNAMIC
BLADE TYPE
UL HOUR RATING
VERT WALLS
HORIZ FLOORS
MODEL
MATERIAL
CLASS
PG
STANDARD FD-140 FD-150 FD-340 FD-350 CURTAIN STYLE BLADES
11 11 11 11 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 11 11 12 12 11 11 11 12 12 12 12
DYNAMIC DYNAMIC DYNAMIC DYNAMIC
1½ 1½
– – – – A B C A B C A B C A B C A B A B – – – – – – – A B A B
TRIPLE-V AIRFOIL TRIPLE-V AIRFOIL CURTAIN CURTAIN CURTAIN CURTAIN CURTAIN CURTAIN CURTAIN CURTAIN CURTAIN CURTAIN CURTAIN CURTAIN CURTAIN CURTAIN CURTAIN CURTAIN TRIPLE-V AIRFOIL CURTAIN CURTAIN
GALV/SS GALV GALV/SS GALV GALV/SS GALV/SS GALV/SS GALV/SS GALV/SS GALV/SS GALV/SS GALV/SS GALV/SS GALV/SS GALV/SS GALV/SS
4000* 4000* 4000* 4000*
4000* 4000* – 4000*
6 6*** 6 6**
3 3
STATIC STATIC STATIC
1½ 1½ 1½ 1½ 1½ 1½
– – –
– – –
– – – 4 4 4 – – – 4 4 4 – – 4 4
VFD-10-A VFD-10-B VFD-10-C VFD-10D-A VFD-10D-B VFD-10D-C VFD-30-A VFD-30-B VFD-30-C
DYNAMIC DYNAMIC DYNAMIC
4000 4000 4000
4000 4000 4000
STATIC STATIC STATIC
3 3 3 3 3 3
– – –
– – – – – – – – – –
DYNAMIC DYNAMIC DYNAMIC VFD-30D-A VFD-30D-B VFD-30D-C CURTAIN-INTEGRAL MOUNTING ANGLE
4000 4000 4000
STATIC STATIC
1½ 1½ 1½ 1½ 1½ 1½ 1½ 1½ 1½ 1½ 3 1½ 1½ 1½ 1½
GALV GALV GALV GALV
– –
VFD-10-IMA VFD-10-IMB
DYNAMIC DYNAMIC
4000 4000
VFD-10D-IMA VFD-10D-IMB OUT-OF-PARTITION
DYNAMIC DYNAMIC STATIC DYNAMIC DYNAMIC STATIC STATIC
GALV/SS GALV GALV GALV GALV/SS GALV GALV
4000 4000 – 4000 2000 – –
4000 4000 – 4000 2000 – –
6 6**
FD-140-OP FD-150-OP VFD-10-OP
– 4
VFD-10D-OP TRUE ROUND
ROUND ROUND ROUND
4 – – – – 4 4
FD-125R VFD-15R VFD-35R THINLINE
STATIC STATIC
THINLINE CURTAIN THINLINE CURTAIN THINLINE CURTAIN THINLINE CURTAIN
GALV GALV GALV GALV
– –
– – – –
VFD-10-TLA VFD-10-TLB VFD-10D-TLA VFD-10D-TLB
DYNAMIC DYNAMIC
4000* 4000*
*2000 FPM on multi-section | **4 in.wg. below 8" in height | ***4 in.wg. when sizes exceed 64"×48" or 32"×96"
PBL – June 2026
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