Filters and discharge accessories, Filters, Roof discharge accessories – Greenheck Fan Centrifugal Ceiling and Cabinet Exhaust Fans CSP User Manual
Page 10: Model rj - pitched roof cap, Model el-10x3 - elbow discharge with grille
10
Filters and Discharge Accessories
Filters
Fans used in most applications will collect airborne
dirt on wheels and motors over time, even where air
is not excessively dirty. Accumulations of dirt on the
fan wheel will sharply reduce performance and cause
imbalance. Dirt buildup on the motor can cause it to
overheat. All of these conditions will shorten the life of
the fan. To help reduce this accumulation, washable
aluminum mesh filters are available to trap dirt before
it enters the fan. These filters should be regularly
cleaned to maintain performance. The Filter Loss Chart
shows the effect the filter will have on performance.
To determine the added resistance, divide the desired
cfm by the filter area (ft
2
). This will give ft/min. Use this
with the filter loss chart to get the added resistance.
Filters reduce sound levels, in addition to reducing dirt
accumulations on the motor and wheel.
Roof Discharge Accessories
Model RJ - Pitched Roof Cap
• Steel construction with black enamel finish
• Integral flashing flange
• Built-in birdscreen and damper
Model EL-10x3 -
Elbow Discharge with Grille
• Designed for installation under roof eaves
• Black epoxy finish (elbow and grille)
• Built-in damper
• For model SP and
CSP sizes 50-290
Mesh
Filter
SP
Grille
Filter Loss Chart
SP Model
Filter Model
Filter
Area (ft
2
)
Designer
Grille
*Metal
Grille
SP-A50 - A190
F-200
F-210
0.739
SP-B50 - B200, A200 - A390
F-200
F-220
0.911
SP-A410 - A510
SP-A710 - A780
NA
F-250
1.518
SP-A900 - A155
NA
F-260
2.078
*Aluminium or Stainless Steel Grille.
0 1 2 3 4 5 6 7 8 9
Velocity (FPM) x 100
.24
.22
.20
.18
.16
.14
.12
.10
.08
.06
.04
.02
.00
Resistance in w
.c.
Model
Use for sizes:
A
B
C
D
E
Throat
RJ-4
C50, B50-B80
11
(279)
9
1
⁄
4
(235)
8
1
⁄
4
(210)
5
5
⁄
16
(135)
4
1
⁄
2
(114)
4
(102)
diameter
RJ-6x9
B90-B200,
A50-A390
18
3
⁄
4
(476)
14
1
⁄
4
(362)
14
1
⁄
2
(368)
10
3
⁄
8
(264)
6
1
⁄
2
(165)
6 x 9
(152 x 229)
RJ-10x10 A410-A1050
18
1
⁄
2
(470)
27
1
⁄
2
(699)
15
3
⁄
4
(400)
23
5
⁄
8
(600)
9
1
⁄
2
(241)
10 x 10
(254 x 254)
All dimensions shown in inches (millimeters).
3.5
(89)
10
(254)
11.125
(283)
2.875
(73)
6.5
(165)
1.625
(42)
9.375
(238)
11.5
(292)
5.125
(130)
3.375
(86)
All dimensions shown in inches (millimeters).
RJ-4 and RJ-6x9
D
C
B
A
E
RJ-4 and RJ-6x9
RJ-10x10
C
D
E
A
B
RJ-10x10