Unit installation
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Spring Air System Enviro Engineering Manual 01/0314
14
KES SELECTION
Two parameters are required to select a KES unit; the total exhaust volume, CFM (l/s) and the
external static pressure, inches W.C. (kpa). To minimize the initial capital cost and future
operation and maintenance costs the most important consideration is to reduce the total exhaust
air volume.
Spring Air Systems sales representatives have a KES Enviro selection computer program.
Contact your local representative and a selection can be made in minutes.
KESF Fan Chart
Horizontal Arrangement, DWDI fan
1000 CFM to 10,000 CFM
External Static Pressure (“W.C.) *
KES CFM
1.50 1.75 2.00 3.00 4.00
HP RPM HP RPM HP RPM HP RPM HP RPM
10 1000 1.80 2807 1.91 2870 2.02 2932 2.47 3167 2.95 3386
20 1500 1.42 2352 1.52 2424 1.63 2495 2.45 2946 2.95 3176
20 2000 2.67 2866 2.81 2926 2.94 2984 3.51 3208 4.09 3419
30 2500 2.50 2635 2.64 2698 2.79 2760 3.38 2995 4.00 3214
30 3000 3.84 3022 4.01 3077 4.18 3131 4.87 3338 5.58 3535
40 3500 3.72 2120 2.72 1857 4.14 228 5.00 2402 5.90 2574
40 4000 5.10 2343 5.33 2387 5.57 2431 6.53 2599 7.52 2758
50 4500 5.00 2258 5.25 2303 5.49 2348 6.50 2520 7.53 2681
50 5000 6.45 2450 6.72 2492 6.99 2533 8.08 2691 9.20 2842
60 5500 5.89 1975 6.19 2017 6.49 2059 7.72 2217 8.99 2367
60 6000 7.25 2110 7.57 2150 7.90 2188 9.22 2338 10.6 2479
80 7000 7.23 2037 7.58 2076 7.93 2114 9.36 2263 10.8 2404
80 8000 10.0 2266 10.1 2275 10.8 2334 12.4 2468 14.0 2596
100 9000 9.15 1822 9.61 1858 11.6 1998 12.1 2031 14.1 2163
100 10000 11.8 1979 12.3 2012 12.8 2044 14.9 2170 17.1 2292
* The above chart includes internal static pressure of the KES-ISH, and KESF fan unit. The chart is for a
DWDI exhaust fan in a vertical or horizontal arrangement either indoor or outdoor design. For other
selections call your local Spring Air Systems representative. “External Static Pressure” above must include
items a, b, d, e & f.
Chart No. 1
The SPRING AIR SYSTEMS “MIN AIR” kitchen hood method, is a practical and cost effective
approach to reducing the total exhaust required. Refer to the “SPRING AIR SYSTEMS Ventilator
Engineering Manual” for detailed “MIN AIR” calculations. To complete these calculations the
designer requires only the proposed kitchen appliance line up.
The total exhaust volume must equal the sum total of the entire kitchen exhaust hoods connected
to the KES unit.