Exhaust Duct Sizes - Spring Air Systems Rev Low Engineering Manual

Hood Width: Island REV LOW
The hood width should be equal the depth of the largest appliance from the wall plus allow for an
additional 12" (305 mm) overhang from the front of the appliance. Each hood should be a
minimum 54" (1372mm).
REV LOW Exhaust Volume Vs Exhaust Duct Size
Exhaust
Volume
CFM l/s W x L
in x in
450 212 10 x 4
500 236 10 x 4.5
625 295 10 x 6.0
750 354 10 x 7.0
875 413 10 x 8.0
1000 472 10 x 9.5
1125 531 10 x 10.5
1250 590 10 x 12.0
1375 649 10 x 13.0
1500 708 10 x 14.0
1625 767 10 x 15.5
1750 826 10 x 16.5
1875 885 10 x 18.0
2000 944 10 x 19.0
2125 1003 10 x 20.
2250 1062 10 x 21.5
2375 1121 10 x 22.5
2500 1180 10 x 24.0
2625 1239 10 x 25.0
2750 1298 10 x 26.0
2875 1357 10 x 27.5
3000 1416 10 x 28.5
3125 1475 10 x 30.0
3250 1534 10 x 31.0
3375 1593 10 x 32.0
1. If exact exhaust volume is not indicated use duct size closest to required exhaust.
2. Model B water wash hoods and dry extractors have 1.5" W.C. (0.38kPa) for exhaust
flow rates from 90 to 450 CFM/ft (140 to 700 l/s/m)
Make Up Air/Supply Air
Introducing fresh air back into the kitchen is generally recommended as good engineering
practice. The amount of make up air should not exceed the total exhaust to maintain a negative
pressure within the kitchen. Inadequate amounts of fresh replacement air will result in cold
drafts, hot spots, poor hood smoke capture and generally uncomfortable working conditions
within the kitchen and uncomfortable environment in the dining room for the customers.
One excellent method of introducing makeup air is through a make up air plenum built into the
ventilator. SPRING AIR SYSTEMS has two optional make up air arrangements; MP and MC.
Directing the make up air through the exhaust hood ensures the correct quantity of make up air
and good air distribution.
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Spring Air Systems REV LOW Engineering Manual Revision 2.0 -021902
Duct Collar Size
W x L
mm x mm
254 x 102
254 x 114
254 x 152
254 x 178
254 x 203
254 x 241
254 x 267
254 x 305
254 x 330
254 x 356
254 x 394
254 x 419
254 x 457
254 x 483
254 x 508
254 x 546
254 x 572
254 x 610
254 x 635
254 x 660
254 x 699
254 x 724
254 x 762
254 x 787
254 x 813
Chart No. 5
Exhaust
Volume
CFM l/s W x L
in x in
3500 1652 10 x 33.5
3625 1711 10 x 34.5
3750 1770 10 x 36.0
3875 1829 10 x 37.0
4000 1888 14 x 27.0
4125 1947 14 x 28.0
4250 2006 14 x 29.0
4375 2065 14 x 30.0
4500 2124 14 x 30.5
4625 2183 14 x 31.5
4750 2242 14 x 32.5
4875 2301 14 x 33.0
5000 2360 14 x 34.0
5125 2419 14 x 35.0
5250 2475 14 x 36.0
5375 2537 14 x 36.5
5500 2596 14 x 37.5
5625 2655 14 x 38.5
5750 2714 14 x 39.0
5875 2773 14 x 40.0
6000 2832 14 x 41.0
6125 2891 14 x 42.0
6250 2950 14 x 42.5
6375 3008 16 x 38.0
6500 3067 16 x 39.0
_
Duct Collar Size
W x L
mm x mm
254 x 851
254 x 876
254 x 914
254 x 940
356 x 686
356 x 711
356 x 737
356 x 762
356 x 775
356 x 800
356 x 826
356 x 838
356 x 864
356 x 889
356 x 914
356 x 927
356 x 953
356 x 978
356 x 991
356 x 1016
356 x 1041
356 x 1067
356 x 1080
406 x 965
406 x 991
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