Products >> Ducts of ventilation >> Specification of flat-oval duct
 
Center air-condition
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  Ducts of ventilation
Air Diffusers
 
 
   
   
   
 
 
中航大记 (Catic-Tai Kee)
Specification of flat-oval duct
Remarks: W-width H-height T-thickness
76
102
127
152
178
203
*228
254
305
355
406
457
508
*609
3"
4"
5"
6"
7"
8"
9"
10"
12"
14"
16"
18"
20"
24"
0.6
236
211
207
271
256
242
276
261
246
232
0.8
315
301
286
272
243
350
336
321
307
278
263
355
341
326
312
283
268
395
381
366
352
322
308
435
421
406
392
362
348
450
436
421
407
377
363
515
500
486
471
442
428
414
540
526
511
482
486
453
Remarks: length of above specification is <=1.8m
76
102
127
152
178
203
*228
254
305
355
406
457
508
*609
3"
4"
5"
6"
7"
8"
9"
10"
12"
14"
16"
18"
20"
24"
0.8
556
541
527
512
498
483
454
551
537
522
508
493
464
621
606
592
578
563
534
631
616
602
588
573
544
711
696
682
667
653
624
780
766
752
737
723
694
665
790
776
761
747
733
704
675
646
870
856
841
827
812
783
754
725
696
668
1.0
905
891
876
862
848
818
789
760
732
703
950
935
921
907
892
863
834
805
776
747
1030
1015
1001
986
972
943
914
885
856
827
1109
1095
1081
1066
1052
1023
994
965
936
907
1155
1140
1111
1082
1053
1024
995
966
1175
1160
1131
1102
1073
1044
1015
987
929
1233
1219
1190
1161
1132
1103
1074
1045
987
1249
1234
1205
1176
1147
1119
1090
1061
1003
1334
1320
1291
1262
1233
1204
1175
1146
1088
1494
1479
1450
1421
1392
1363
1335
1306
1248
1653
1639
1610
1581
1552
1523
1494
1465
1407
1813
1798
1769
1740
1711
1682
1654
1625
1567
1.2
1972
1930
1900
1871
1842
1813
1784
1726
2059
2030
2002
1973
1944
1886
2205
2191
2045
 
Remarks: 1. length of above specification is <=3.6m
2. Length of *228 is <=1.8m
3. Length of *609 is <=2.4m