Ceiling radiation DAMPERS
STANDARD AND TRUE ROUND
Pottorff's ceiling radiation dampers create radiant heat barriers in HVAC systems. They are installed horizontally in the ceiling membrane of combustible floor-ceiling or roof-ceiling assemblies. ¢ UL 555C Rating up to 3 Hours
¢ Meets NFPA Standards ¢ Warnock Hersey Listing ¢ Galvanized Steel Construction ¢ CSFM Listing
CFD-20 CURTAIN BLADE
CFD-15R BUTTERFLY BLADE
WOOD TRUSS SYSTEM
FOR MORE EXPANDED INSTALLATION OPTIONS, SEE PAGE 13 ¢ Mounting with Boot Rails ¢ Expanded Duct Connections ¢ Extended Plenum Height
Pottorff's ceiling radiation dampers are the preferred solution for wood truss systems, and ideal for multi-family projects. ¢ UL 555C Rating of 1 Hour
CFD-521-IP
¢ Meets NFPA Standards ¢ Warnock Hersey Listing ¢ Galvanized Steel Construction ¢ CSFM Listing
CFD-521
CFD-521-90 BUTTERFLY BLADE
MAXIMUM SIZE (in)
DUCT CONNECTION
ROOF/FLOOR CEILING ASSEMBLIES
UL RATED WOOD-TRUSS ASSEMBLIES
SLEEVE OUTLET BOX
OUTLET BOX R VALUE
UL555 FIRE RESISTANCE (hr)
MIN SIZE (in)
BLADE TYPE
TOP
SIDE
MODEL
3 3 3 STANDARD CFD-15 CFD-15-LP CFD-20 TRUE ROUND CFD-15R WOOD TRUSS SYSTEMS 3
BUTTERFLY LOW PROFILE BTRFLY CURTAIN
4×6 6×12 4×4
24×24 24×24 24×24
– – –
– – –
–
4 Ø
24 Ø
ROUND BUTTERFLY
–
–
18×18 24w or 20h ≤ 324 in 2 12×12 (10 Ø) 14w×10h or 10w×14h ≤ 144in 2
–
*
*
4×6
BUTTERFLY
1
CFD-521
–
–
4×4 (4 Ø)
–
–
BUTTERFLY
1
CFD-521-90
–
12×12 24w or 24h ≤ 144 in 2
16×16 24w or 20h ≤ 256 in 2 16×16 24w×20h ≤ 256 in 2 12×12 (10 Ø) 14w or 10h ≤ 144 in 2 12×12 (10 Ø) 24w or 24h ≤ 144 in 2
R-6.3 or 8.0 R-6.5 or 8.7
4×6
–
BUTTERFLY
1
CFD-521-BT
–
4×6
*
*
BUTTERFLY
1
CFD-521-IP
–
*
*
4×6
BUTTERFLY
1
CFD-521-NP
–
–
–
–
BUTTERFLY
1
CFD-521-NP90
–
4×6 (4 Ø)
COLD FORMED STEEL TRUSS SYSTEMS
R-6.5 or 8.7
–
16×14
BUTTERFLY
1
CFD-521-ST
4×6
–
OPTIONAL STANDARD
* See Installation instructions for duct connection size and location restrictions
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