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Assembly Instructions
Framing the Wall Opening
1. Before installing the fan(s) you MUST have the proper rough opening. Be sure to leave enough space between the
framed openings so that the fan flanges do not overlap and are allowing room for fan cones. The wall opening
must be square, plumb and flat for proper fan installation.
FAN DIMENSIONS
Figure 1
54" Interior mount FG fan with long cone
54" Interior mount FG fan with short cone
54" Exterior mount FG fan with long cone
50" Fiberglass fan with FC50LW cone
50" Fiberglass fan with PC50S (B or W) cone
50" Fiberglass fan with 950174 cone
36" Fiberglass fan with PC36L (B or W) cone
36" Fiberglass fan with 936174 cone
Build the fan framing with 2" (38mm) nominal dimension lumber. (This is not supplied.) The required rough open-
ing is provided in the table above. Planning the layout on spacing between cone fans is very important. If the space
is too close together it will cause interference with the cones.
An overhanging roof, or snow guards on the roof, MUST be provided to fully cover the fan. VAL-CO®
warranty does not apply for equipment against snow or ice damage. If a 54" fiberglass fan is in-
stalled in a region that receives significant snowfall, Valco recommends a 54" long cone fan with the
addition of a 954226 cone reinforcement kit, or a 54" short cone fan.
©2021 Valco Industries, Inc.
ROUGH OPENING DIMENSIONS
Figure 2
H
F
"A"
"B"
65"
8.25"
(165.1cm)
(20.95cm)
65"
2.5"
(165.1cm)
(6.35cm)
64.4"
8.25"
(163.6cm)
(20.95cm)
62.25"
8.50"
(158.12cm)
(20.95cm)
62.25"
8.50"
(158.12cm)
(20.95cm)
62.25"
2.77"
(158.12cm)
(7.04cm)
48.5"
7"
(123.2cm)
(17.78cm)
48.5"
3.75"
(123.2cm)
(9.53cm)
Protection from snow or ice loads must be provided!
G
E
SLANT WALL FAN SIZE
"C"
"D"
68.88"
65.25"
(174.95cm)
(165.73cm)
(156.21cm)
61.25"
38.87"
(155.57cm)
(98.73cm)
(156.21cm)
68.88"
57"
(174.95cm)
(144.78cm)
64.5"
49.25"
(163.83cm)
(125.1cm)
(142.24cm)
59"
39.25"
(149.86cm)
(99.7cm)
(142.24cm)
58"
49"
(147.32cm)
(124.46cm)
(142.24cm)
50.25"
47"
(127.64cm)
(119.38cm)
(113.03cm)
44.5"
47"
(113.03cm)
(119.38cm)
(113.03cm)
9
ALLOW FOR CONES IN SPACING
Figure 3
"E"
"F"
"G"
61.5"
61.5"
(156.21cm)
61.5"
61.5"
(156.21cm)
65"
(165.1cm)
56"
58"
(147.32cm)
56"
58"
(147.32cm)
56"
58"
(147.32cm)
44.5"
44.5"
(113.03cm)
44.5"
44.5"
(113.03cm)
"H"
65"
(165.1cm)
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