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SIZE LIMITATIONS
Vertical or Horizontal
Single Multi-
mm Section Section
Minimum 102 x 102 NA
Maximum 914 x 914 2438 x 1219
or 3048 x 1016
Installation of sizes larger than the maximums shown requires
approval of the authority having jurisdiction.
DFD-M150 Type A
SIZING AND ASSEMBLY DATA
Dampers larger than maximum single section size are supplied in 2 or more sections
of equal size. If ordered with a factory sleeve, multi-section dampers are factory
assembled ready for installation. If ordered without a factory sleeve, multi-section
dampers require field assembly. (See Greenheck Fire Damper Installation Instructions
#452763)
The following chart and illustrations show minimum and maximum damper section
size and assembly configurations for multi-section dampers.
1 2 3
Blade Stack
Dimensions
914mm max.
914mm max.
2438mm max.
1219mm max.
3048mm max.
1016mm max.
Mult-Section Limitations
Maximum damper height is 1016mm when combination width is
greater than 2438mm and less than or equal to 3048mm.
3
Multi-Section Limitations
Maximum damper height is 1219mm when combination width is 2438mm or less.
2
Maximum Single Section Dimensions
1
*
These dimensions are furnished
approximately 6mm undersize.
(Dimension in mm)