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TUTTLE & BAILEY
Box Type & Model
Inlet Size (in.)
CFM @ 1"
Area
K (Box Constant)
4" Round
209
0.090
2.97
All Models: SDV / FPC / FPV / HPV / DDV /
RV
5" Round
315
0.136
2.99
6" Round
462
0.196
2.89
7" Round
612
0.267
3.05
8" Round
817
0.349
2.93
10" Round
1249
0.545
3.05
60 deg travel, counter clockwise to close
12" Round
1792
0.785
3.08
14" Round
2474
1.068
2.99
16" Round
3235
1.396
2.99
18" Round
4117
1.767
2.95
4" Round
235
0.090
2.35
Exhaust Boxes Orafice Ring: RR
5" Round
388
0.136
1.97
6" Round
569
0.196
1.90
7" Round
792
0.267
1.82
8" Round
1079
0.349
1.68
10" Round
1585
0.545
1.90
12" Round
2271
0.785
1.92
14" Round
2978
1.068
2.06
16" Round
4057
1.396
1.90
18" Round
5161
1.767
1.88
YORK
Box Type & Model
Inlet Size (in.)
CFM @ 1"
Area
K (Box Constant)
5" Round
440
0.14
1.62
Single Duct Cooling Only: TSNQ / TSEQ /
TSW/TSN
6" Round
600
0.20
1.78
7" Round
850
0.27
1.62
8" Round
1200
0.35
1.36
Fan Powered Series Fan: FCN / FCE / FCW
10" Round
1700
0.55
1.68
12" Round
1900
0.79
2.77
Fan Powered Parallel Fan: FV / FVE / FVW
14" Round
2750
1.07
2.43
FVN
16" Round
3300
1.40
2.89
18" Round
5500
1.77
1.66
20" Round
6600
2.18
1.75
60 deg travel, counter clockwise to close
24" Round
9500
3.14
1.75
