Gravity Ventilators
Models WIH and WRH
Intake and Relief
November
2007
Louvered Penthouse Gravity Ventilator
Models WIH & WRH
Greenheck designs penthouse units for aesthetically pleasing gravity intake or relief applications.
• Clean horizontal lines blend perfectly with modern architecture.
• The special louver design results in low pressure
drops, low hood heights, and maintains maximum
weather resistance.
• All-aluminum construction assures lasting durability
and appearance.
• The removable cover is equipped with insulation to
prevent condensation.
The flexible design of the WIH (Intake) and WRH (Relief) allow the units to be shipped in
preassembled sections. These sections are easy to assemble on the jobsite and can be assembled
without special tools. All required fasteners and complete assembly instructions are shipped with
each unit.
Construction Features
Stormproof Louver Blades – Each unit features stormproof
Throat
aluminum louver blades with mitered corners. The stormproof louver was
tested under the most extreme weather conditions and found to be a
superior design. The sturdy extruded aluminum louver blade has a material
thickness of 0.080 inches.
4 inches
Weathershield – The interior vertical edge of the curb cap forms
the throat and weathershield. Each corner is also shielded to prevent
leakage. The louvers are mounted 4 inches from the roof opening for
added weather protection.
Assembled Sides and Cover – The unit is made into four side
sections and a reinforced cover. A factory assembled side consists
of the curb cap, vertical supports, and the quantity of louvers
required for the specified height.
The sides are joined at the four corners by stainless steel screws
in each louver. These screws are countersunk to maintain the
appearance of the mitered corner. The cover is securely fastened to
the unit by stainless steel fasteners.
Dimensional Drawing
B
See table on opposite page for product dimensions.
C
Throat
Curb Cap (A)
2 1/2 in.
Dimensional and Performance Data
Dimensions (inches)
Area
(ft2)
12 x 12
1.0
12 x 14
1.2
12 x 16
1.3
12 x 18
1.5
12 x 22
1.8
12 x 24
2.0
14 x 14 1.36
14 x 16 1.55
14 x 18 1.75
14 x 20 1.95
14 x 24 2.34
14 x 28 2.70
16 x 16 1.78
16 x 20 2.22
16 x 24 2.68
16 x 28 3.11
16 x 30 3.33
16 x 32 3.55
18 x 18 2.25
18 x 24
3.0
18 x 26 3.25
18 x 30 3.74
18 x 32
4.0
18 x 36
4.5
22 x 22 3.37
22 x 26 3.97
22 x 30
4.6
22 x 36
5.5
22 x 40
6.1
22 x 44 6.73
24 x 24
4.0
24 x 30
5.0
24 x 36
6.0
24 x 40 6.67
24 x 44 7.35
24 x 48
8.0
28 x 28 5.44
28 x 36
7.0
28 x 40
7.8
28 x 44 8.55
28 x 50 9.75
28 x 56 10.9
32 x 32
7.1
32 x 36
8.0
32 x 40
8.9
32 x 48 10.7
32 x 54 12.0
32 x 64 14.2
36 x 36
9.0
36 x 40 10.0
36 x 48 12.0
36 x 54 13.5
36 x 60 15.0
36 x 72 18.0
42 x 42 12.25
42 x 48 14.0
42 x 54 15.75
42 x 60 17.5
42 x 72 21.0
42 x 84 24.5
48 x 48 16.0
48 x 54 18.0
48 x 64 21.4
48 x 72 24.0
48 x 84 28.0
48 x 96 32.0
54 x 54 20.25
54 x 60 22.0
54 x 72 27.0
54 x 84 31.5
54 x 96 36.0
54 x 108 40.5
60 x 60 25.0
60 x 72 30.0
60 x 84 35.0
60 x 96 40.0
60 x 108 45.0
60 x 120 50.0
Throat
.008
A
B
C
20 x 20
20 x 22
20 x 24
20 x 26
20 x 30
20 x 32
22 x 22
22 x 24
22 x 26
22 x 28
22 x 32
22 x 36
24 x 24
24 x 28
24 x 30
24 x 36
24 x 38
24 x 40
26 x 26
26 x 32
26 x 34
26 x 38
26 x 40
26 x 44
30 x 30
30 x 34
30 x 38
30 x 44
30 x 48
30 x 52
32 x 32
32 x 38
32 x 44
32 x 48
32 x 52
32 x 56
36 x 36
36 x 44
36 x 48
36 x 52
36 x 58
36 x 64
40 x 40
40 x 44
40 x 48
40 x 56
40 x 62
40 x 72
44 x 44
44 x 48
44 x 56
44 x 62
44 x 68
44 x 80
50 x 50
50 x 56
50 x 62
50 x 68
50 x 80
50 x 92
56 x 56
56 x 62
56 x 72
56 x 80
56 x 92
56 x 104
62 x 62
62 x 68
62 x 80
62 x 92
62 x 104
62 x 116
68 x 68
68 x 80
68 x 92
68 x 104
68 x 116
68 x 128
26 x 26
26 x 28
26 x 30
26 x 32
26 x 36
26 x 38
28 x 28
28 x 30
28 x 32
28 x 34
28 x 38
28 x 42
30 x 30
30 x 34
30 x 36
30 x 42
30 x 44
30 x 46
32 x 32
32 x 38
32 x 40
32 x 44
32 x 46
32 x 50
36 x 36
36 x 40
36 x 44
36 x 50
36 x 54
36 x 58
38 x 38
38 x 44
38 x 50
38 x 54
38 x 58
38 x 62
42 x 42
42 x 50
42 x 54
42 x 58
42 x 64
42 x 70
46 x 46
46 x 50
46 x 54
46 x 62
46 x 68
46 x 78
50 x 50
50 x 54
50 x 62
50 x 68
50 x 74
50 x 86
56 x 56
56 x 62
56 x 68
56 x 74
56 x 86
56 x 98
62 x 62
62 x 68
62 x 78
62 x 86
62 x 98
62 x 110
68 x 68
68 x 74
68 x 86
68 x 98
68 x 110
68 x 122
74 x 74
74 x 86
74 x 98
74 x 110
74 x 122
74 x 134
12 ⁄4
121⁄4
121⁄4
121⁄4
121⁄4
121⁄4
121⁄4
121⁄4
121⁄4
121⁄4
121⁄4
121⁄4
121⁄4
121⁄4
121⁄4
121⁄4
121⁄4
121⁄4
121⁄4
121⁄4
121⁄4
16
16
16
16
16
16
193⁄4
193⁄4
193⁄4
16
193⁄4
193⁄4
193⁄4
193⁄4
193⁄4
193⁄4
193⁄4
193⁄4
193⁄4
193⁄4
231⁄2
193⁄4
193⁄4
193⁄4
231⁄2
231⁄2
271⁄4
193⁄4
231⁄2
231⁄2
231⁄2
231⁄2
271⁄4
231⁄2
271⁄4
271⁄4
31
31
343⁄4
271⁄4
31
31
343⁄4
381⁄2
381⁄2
31
343⁄4
381⁄2
381⁄2
421⁄2
421⁄2
343⁄4
381⁄2
421⁄4
46
493⁄4
493⁄4
1
Number
of Louvers
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
4
4
4
4
4
4
5
5
5
4
5
5
5
5
5
5
5
5
5
5
6
5
5
5
6
6
7
5
6
6
6
6
7
6
7
7
8
8
9
7
8
8
9
10
10
8
9
10
10
11
11
9
10
11
12
13
13
Intake (WIH) CFM
Relief (WRH) CFM
Total Pressure Drop in inches of wg*
.030
.048 .069
.094 .123
THROAT VELOCITY (ft./min.)
.192
.024
Total Pressure Drop in inches wg*
.055 .075
.097 .123 .152
THROAT VELOCITY (ft./min.)
.22
200
400
500
600
700
800
1000
400
600
700
800
900
1000
1200
200
240
260
300
360
400
272
310
350
390
468
540
356
444
536
622
666
710
450
600
650
748
800
900
674
794
920
1100
1220
1346
800
1000
1200
1334
1470
1600
1088
1400
1560
1710
1950
2180
1420
1600
1780
2140
2400
2840
1800
2000
2400
2700
3000
3600
2450
2800
3150
3500
4200
4900
3200
3600
4280
4800
5600
6400
4050
4400
5400
6300
7200
8100
5000
6000
7000
8000
9000
10000
400
480
520
600
720
800
544
620
700
780
936
1080
712
888
1072
1244
1332
1420
900
1200
1300
1496
1600
1800
1348
1588
1840
2200
2440
2692
1600
2000
2400
2668
2940
3200
2176
2800
3900
3420
3900
4360
2840
3200
3560
4280
4800
5680
3600
4000
4800
5400
6000
7200
4900
5600
6300
7000
8400
9800
6400
7200
8560
9600
11200
12800
8100
8800
10800
12600
14400
16200
10000
12000
14000
16000
18000
20000
500
600
650
750
900
1000
680
775
875
975
1170
1350
890
1110
1340
1555
1665
1775
1125
1500
1625
1870
2000
2250
1685
1985
2300
2750
3050
3365
2000
2500
3000
3335
3675
4000
2720
3500
4680
4275
4875
5450
3550
4000
4450
5350
6000
7100
4500
5000
6000
6750
7500
9000
6125
7000
7875
8750
10500
12250
8000
9000
10700
12000
14000
16000
10125
11000
13500
15750
18000
20250
12500
15000
17500
20000
22500
25000
600
720
780
900
1080
1200
816
930
1050
1170
1404
1620
1068
1332
1608
1866
1998
2130
1350
1800
1950
2244
2400
2700
2022
2382
2760
3300
3660
4038
2400
3000
3600
4002
4410
4800
3264
4200
5460
5130
5850
6540
4260
4800
5340
6420
7200
8520
5400
6000
7200
8100
9000
10800
7350
8400
9450
10500
12600
14700
9600
10800
12840
14400
16800
19200
12150
13200
16200
18900
21600
24300
15000
18000
21000
24000
27000
30000
700
840
910
1050
1260
1400
952
1085
1225
1365
1638
1890
1246
1554
1876
2177
2331
2485
1575
2100
2275
2618
2800
2150
3359
2779
3220
3850
4270
4711
2800
3500
4200
4669
5145
5600
3808
4900
6240
5985
6825
7630
4970
5600
6230
7490
8400
9940
6300
7000
8400
9950
10500
12600
8575
9800
11025
12250
14700
17150
11200
12600
14980
16800
19600
22400
14175
15400
18900
22050
25200
28350
17500
21000
24500
28000
31500
35000
800
960
1040
1200
1440
1600
1088
1240
1400
1560
1872
2160
1424
1776
2144
2488
2664
2840
1800
2400
2600
2992
3200
3600
2696
3176
3680
4400
4880
5384
3200
4000
4800
5336
5880
6400
4352
5600
7020
6840
7800
8720
5680
6400
7120
8560
9600
11360
7200
8000
9600
10800
12000
14400
9800
11200
12600
14000
16800
19600
12800
14400
17120
19200
22400
25600
16200
17600
21600
25200
28800
32400
20000
24000
28000
32000
36000
40000
1000
1200
1300
1500
1800
2000
1360
1550
1750
1950
2340
2700
1780
2220
2680
3110
3330
3500
2250
3000
3250
3740
4000
4500
3370
3970
4600
5500
6100
6730
4000
5000
6000
6670
7350
8000
5440
7000
7800
8550
9750
10900
7100
8000
8900
10700
12000
14200
9000
10000
12000
13500
15000
18000
12250
14000
15750
17500
21000
24500
16000
18000
21400
24000
28000
32000
20250
22000
27000
31500
36000
40500
25000
30000
35000
40000
45000
50000
400
480
520
600
720
800
544
620
700
780
936
1080
712
888
1072
1244
1328
1420
900
1200
1300
1496
1600
1800
1348
1588
1840
2200
2440
2692
1600
2000
2400
2668
2940
3200
2176
2800
3120
3420
3900
4360
2840
3200
3560
4280
4800
5680
3600
4000
4800
5400
6000
7200
4900
5600
6300
7000
8400
9800
6400
7200
8560
9600
11200
12800
8100
8800
10800
12600
14400
16200
10000
12000
14000
16000
18000
20000
600
720
780
900
1080
1200
816
930
1050
1170
1404
1620
1068
1332
1608
1866
1992
2130
1350
1800
1950
2004
2400
2700
2022
2832
2760
3300
3660
4038
2400
3000
3600
4002
4410
4800
3264
4200
4680
5130
5850
6540
4260
4800
5340
6420
7200
8520
5400
6000
7200
8100
9000
10800
7350
8400
9450
10500
12600
14700
9600
10800
12840
14400
16800
19200
12150
13200
16200
18900
21600
24300
15000
18000
21000
24000
27000
30000
700
840
910
1050
1260
1400
952
1085
1225
1365
1638
1890
1246
1554
1876
2177
2324
2485
1575
2100
2275
2618
2800
3150
2359
2779
3220
3850
4270
4711
2800
3500
4200
4669
5145
5600
3808
4900
5460
5985
6825
7630
4970
5600
6230
7490
8400
9940
6300
7000
8400
9450
10500
12600
8575
9800
11025
12250
14700
17150
11200
12600
14980
16800
19600
22400
14175
15400
18900
22050
25200
28350
17500
21000
24500
28000
31500
35000
800
960
1040
1200
1440
1600
1088
1240
1400
1560
1872
2160
1424
1776
2144
2488
2656
2840
1800
2400
2600
2992
3200
3600
2696
3176
3680
4400
4880
5384
3200
4000
4800
5336
5880
6400
4352
5600
6240
6840
7800
8720
5680
6400
7120
8560
9600
11360
7200
8000
9600
10800
12000
14400
9800
11200
12600
14000
16800
19600
12800
14400
17120
19200
22400
25600
16200
17600
21600
25200
28800
32400
20000
24000
28000
32000
36000
40000
900
1080
1170
1350
1620
1800
1224
1395
1575
1755
2106
2430
1602
1998
2412
2799
2988
3195
2025
2700
2925
3366
3600
4050
3033
3573
4140
4950
5490
6057
3600
4500
5400
6003
6615
7200
4896
6300
7020
7695
8775
9810
6390
7200
8010
9630
10800
12780
8100
9000
10800
12150
13500
16200
11025
12600
14175
15750
18900
22050
14400
16200
19260
21600
25200
28800
18225
19800
24300
28350
32400
36450
22500
27000
31500
36000
40500
45000
1000
1200
1300
1500
1800
2000
1360
1550
1750
1950
2340
2700
1780
2220
2680
3110
3320
3550
2250
3000
3250
3740
4000
4500
3370
3970
4600
5500
6100
6730
4000
5000
6000
6670
7350
8000
5440
7000
7800
8550
9750
10900
7100
8000
8900
10700
12000
14200
9000
10000
12000
13500
15000
18000
12250
14000
15750
17500
21000
24500
16000
18000
21400
24000
28000
32000
20250
22000
27000
31500
36000
40500
25000
30000
35000
40000
45000
50000
1200
1440
1560
1800
2160
2400
1632
1860
2100
2340
2808
3240
2136
2664
3216
3732
3984
4260
2700
3600
3900
4488
4800
5400
4044
4764
5520
6600
7320
8076
4800
6000
7200
8004
8820
9600
6528
8400
9360
10260
11700
13080
8520
9600
10680
12840
14400
17040
10800
12000
14400
16200
18000
21600
14700
16800
18900
21000
25200
29400
19200
21600
25680
28800
33600
38400
24300
26400
32400
37800
43200
48600
30000
36000
42000
48000
54000
60000
*Total pressure drop includes velocity pressure losses at outlet of throat but does not include birdscreen loss.
Increase the total pressure drop with a 1.15 multiplier to allow for birdscreen pressure drop.
For other sizes consult factory
Typical Specifications
Models WIH/WRH
Models WIH and WRH shall be low silhouette louvered penthouse units for intake or
relief applications.
Units shall feature a stormproof 0.080 inch aluminum louver with mitered corners.
Construction shall be all-aluminum to assure lasting durability and appearance.
Unit shall have a removable aluminum cover for internal access.
Cover shall be lined with fiberglass insulation to prevent condensation.
Louvers shall be mounted 4 inches from the roof opening for maximum weather
protection.
Cover shall be securely fastened to the unit by corrosion resistant fasteners.
Birdscreen shall be constructed of 1/2 inch mesh securely mounted across intake/relief
openings.
Louver design shall result in low pressure drops, low hood heights, and maintain
maximum weather resistance.
Options include a variety of bird and insect screens, dampers, roof curbs, special
finishes and factory assembled based on shipping limitations.
Models WIH or WRH shall be manufactured by Greenheck Fan Corporation, in
Schofield, Wisconsin and in Sacramento, California.
Building Value in Air
Greenheck delivers value
top quality, innovative air-
And building owners and
to mechanical engineers by
related equipment. We offer
occupants value the energy
helping them solve virtually
extra value to contractors
efficiency, low maintenance
any air quality challenges
by providing easy-to-install,
and quiet dependable operation
their clients face with a
competitively priced, reliable
they experience long after the
comprehensive selection of
products that arrive on time.
construction project ends.
Our Warranty
Greenheck warrants this equipment to be free from defects in material and workmanship for a period
of one year from the purchase date. Any units or parts which prove defective during the warranty
period will be replaced at our option when returned to our factory, transportation prepaid. Motors are
warranted by the motor manufacturer for a period of one year. Should motors furnished by Greenheck
prove defective during this period, they should be returned to the nearest authorized motor service
station. Greenheck will not be responsible for any removal or installation costs.
As a result of our commitment to continuous improvement, Greenheck reserves the right to change
specifications without notice.
P.O. Box 410 • Schofield, WI 54476-0410 • Phone (715) 359-6171 • greenheck.com
Prepared to Support
Green Building Efforts
WIH/WRH Catalog Rev 3 November 2007 RG
Copyright © 2007 Greenheck Fan Corp.