Air Extraction Rates

CANOPY EXHAUST AIR EXTRACTION RATES IN LITRES PER SECOND.

Canopy Depth


Canopy Width

600

700

800

900

1000

1100

1200

1300

1400

1500

600
700
800
900
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600

216
252
288
324
360
396
432
468
504
540
576
612
648
684
720
756
792
828
864
900
936
972
1008
1044
1080
1116
1152
1188
1224
1260
1296

252
294
336
378
420
462
504
546
588
630
672
714
756
798
840
882
924
966
1008
1050
1092
1134
1176
1218
1260
1302
1344
1386
1428
1470
1512

288
336
384
432
480
528
576
624
672
720
768
816
864
912
960
1008
1056
1104
1152
1200
1248
1296
1344
1392
1440
1488
1536
1584
1632
1680
1728

324
378
432
486
540
594
648
702
756
810
864
918
972
1026
1080
1134
1188
1242
1296
1350
1404
1458
1512
1566
1620
1674
1728
1782
1836
1890
1944

360
420
480
540
600
660
720
780
840
900
960
1020
1080
1140
1200
1260
1320
1380
1440
1500
1560
1620
1680
1740
1800
1860
1920
1980
2040
2100
2160

396
462
528
594
660
726
792
858
924
990
1056
1122
1188
1254
1320
1386
1452
1518
1584
1650
1716
1782
1848
1914
1980
2046
2112
2178
2244
2310
2376

432
504
576
648
720
792
864
936
1008
1080
1152
1224
1296
1368
1440
1512
1584
1656
1728
1800
1872
1944
2016
2088
2160
2232
2304
2376
2448
2520
2592

468
546
624
702
780
858
936
1014
1092
1170
1248
1326
1404
1482
1560
1638
1716
1794
1872
1950
2028
2106
2184
2262
2340
2418
2496
2574
2652
2730
2808

504
588
672
756
840
924
1008
1092
1176
1260
1344
1428
1512
1596
1680
1764
1848
1932
2016
2100
2184
2268
2352
2436
2520
2604
2688
2772
2856
2940
3024

540
630
720
810
900
990
1080
1170
1260
1350
1440
1530
1620
1710
1800
1890
1980
2070
2160
2250
2340
2430
2520
2610
2700
2790
2880
2970
3060
3150
3240

The above air quantities are based on an air velocity through the canopy face of 0.6 m/s. This is to be regarded as a minimum standard and Local Authorities should be consulted to ensure that the above air quantities meet their requirments.