CFM PERCOOL

Return Air Grille
RAG Return Air Grille or Transfer Grilles are available in louver or inverted v-pattern for dark room application. With or without opposed blade volumn dampers .
 
Return Air Grille Performance Data
Listed Size
Free Effective Area (SQ.FT.)
FACE VELOCITIES
300
400
500
600
700
800
900
1000
10″ x 6″
0.29
82
110
143
175
205
230
260
290
12″ x 6 “
0.35
103
139
173
210
242
280
315
350
10″ x 8 “
0.39
112
153
193
234
270
310
350
390
12″ x 8 “
0.47
138
190
235
278
330
375
425
470
18″ x 6 “
0.54
159
214
270
323
380
430
485
540
12″ x 12″
0.72
214
290
358
430
505
575
650
720
18″ x 12″
1.10
328
438
550
660
770
880
990
1100
24″ x 12″
1.47
438
590
735
880
1030
1175
1320
1470
18″ x 18″
1.65
492
658
822
990
1155
1320
1485
1650
30″ x 12″
1.85
548
740
925
1110
1295
1480
1665
1850
24″ x 18″
2.28
683
910
1140
1370
1600
1825
2050
2280
30″ x 18″
2.86
858
1145
1430
1715
2000
2290
2580
2860
24″ x 24″
3.06
915
1222
1528
1840
2140
2450
2760
3060
36″ x 18″
3.44
1030
1373
1720
2060
2410
2750
3100
3440
30″ x 24″
3.86
1158
1542
1930
2320
2700
3090
3480
3860
36″ x 24″
4.75
1422
1900
2375
2850
3320
3800
4280
4750
36″ x 30″
5.85
1755
2340
2920
3510
4100
4680
5270
5850
48″ x 24″
6.24
1870
2495
3120
3740
4370
4990
5620
6240
48″ x 30″
7.99
2400
3200
4000
4800
5600
6400
7200
7990
48″ x 36″
9.47
2840
3790
4740
5690
6640
7580
8520
9470

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