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SIZE LIMITATIONS
Vertical or Horizontal
Single Multi-
mm Section Section
Minimum 102 x 102 NA
Maximum 914 x 813 1219 x 813
Installation of sizes larger than the maximums shown requires
approval of the authority having jurisdiction.
DFD-M150 Type B
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.
Multi Section Limitations
Maximum damper height is 940mm when combination width is
greater than 2438mm and less than or equal to 3048mm.
3
Multi Section Limitations
Maximum damper height is 1143mm when combination width is 2438mm or less.
2
Maximum Single Section
Dimensions
1
2438mm
Max.
1143mm
Max.
3048mm
Max.
940mm
Max.
813mm
Max.
914mm
Max.
Multi Section Limitations
Maximum damper height is 1778mm when combination width is 1880mm or less. (Vertical
mullion provided on dampers over 914mm wide and 1143mm high.)
4
1803mm
Max.
1880mm
Max.
Reinforcement
Rods
H*
O*
W*
Overall Damper
Dimensions
H* O*
76 127
102 152
127 178
152 203
178 229
203 254
229 279
254 305
279 330
305 356
330 381
356 406
381 457
406 483
432 508
457 533
483 559
508 584
533 610
559 660
584 686
610 711
635 737
660 762
686 787
711 813
737 838
762 864
787 889
813 914
*
These dimensions are furnished
approximately 6mm undersize.
(Dimension in mm)
SIZE LIMITATIONS
Vertical or Horizontal Vertical Only
Minimum 76mm dia. NA
Maximum 1168mm dia. 1829mm dia.
Sizing and Assembly Data
Dampers larger than maximum single section size are supplied as a
factory assembly of two or more sections of equal size.
Transition is centered on damper frame (or frame assembly for
multiple section dampers).
76mm min.
1829mm max.
DFD-M150 Type R
Copyright © 2006 Greenheck Fan Corporation
DFD-M150 Rev. 4 December 2006