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Model Series:
3000
Single Duct
3210
Dual Duct
35S-OAI Series Fan Powered w/ O.A. Damper
38S
Underfloor Fan Powered
Inlet
Duct Area
Type
Size
(sq. ft.)
0.087
4
0.136
5
0.196
6
ROUND
0.267
7
0.349
8
0.441
9
0.545
10
0.754
12
OVAL
0.970
14
1.186
16
RECT.
2.667
24 x 16
Model Series:
36VRS
Square/Rectangular Retrofit
Damper
Damper
Inlet
(valve)
(valve)
Type
Size
Size
(inches)
(sq. ft.)
5 x 5
0.174
7
6 x 6
0.250
8
8 x 6
0.333
9
10 x 8
0.555
10
14 x 8
0.778
11
18 x 6
0.750
11A
12 x 10
0.833
12
SQUARE
OR
18 x 10
1.250
13
RECT.
18 x 12
1.500
14
20 x 14
1.944
15
30 x 12
2.500
15A
22 x 16
2.444
16
24 x 18
3.000
17
30 x 20
4.167
18
40 x 20
5.555
19
7-11-22
IOM-VAVK-2 (Supersedes NEW)
Nailor Industries Inc. reserves the right to change any information concerning product or specification without notice or obligation.
INSTALLATION AND OPERATION MANUAL
CROSS-FLOW SENSOR K-FACTORS
FOR VAV TERMINAL UNITS
K-Factor
Velocity
F-Factor
(cfm)
(fpm)
(amp.)
202
2322
2.98
325
2390
2.81
524
2673
2.24
714
2674
2.24
987
2828
2.01
1235
2800
2.05
1575
2890
1.92
2230
2958
1.83
2629
2710
2.18
3247
2738
2.14
7760
2910
1.89
K-Factor
Velocity
F-Factor
Area
(cfm)
(fpm)
(amp.)
437
2509
696
2786
972
2920
1621
2920
2272
2920
2089
2786
2469
2964
3704
2964
4612
3075
5562
2861
7687
3075
7283
2980
8940
2980
12349
2964
16462
2964
Model Series:
3100
3230
3240
33SZ
35N
35S
35S-CVP Pressurization Series Fan Powered
35SST
35SXC
36VRR
Inlet
Size
4
5
6
7
8
9
10
12
14
16
24 x 16
Model Series:
37N
Low Profile Parallel Fan Powered
37S
Low Profile Fan Powered
2.82
37SST Low Profile Stealth Fan Powered
2.25
37SXC LowProfile Stealth XC Series Fan Powered
2.01
2.01
Inlet
Size
2.01
2.25
4
1.92
5
6
1.92
8
1.77
10
2.03
14 x 8
1.77
14 x 10
1.87
Equations:
1.87
1.92
Q = K x
1.92
Where: Q = Airflow Rate (cfm)
∆
P = Sensor Differential Pressure ("w.g.)
K = K-Factor Calibration Constant (standard air)
F = Amplification Factor (sensor gain)
A = Nom. Duct Area (sq. ft.)
The K-Factors tabulated in the above tables are the
airflow required to produce a 1.0" w.g. differential
pressure at the Cross-Flow Sensor.
Single Duct
Dual Duct
"Blendmaster" Dual Duct
Chilled Water Fan Powered
Parallel Fan Powered
Series Fan Powered
Stealth Series Fan Powered
Stealth XC Series Fan Powered
Round Retrofit
Duct Area
K-Factor
Type
(sq. ft.)
(cfm)
0.087
202
0.136
325
0.196
524
0.267
714
0.349
987
ROUND
0.441
1235
0.545
1575
0.785
2363
1.068
3002
1.395
4093
RECT.
2.667
7760
Duct Area
K-Factor
Type
(sq. ft.)
(cfm)
0.087
202
0.136
325
ROUND
0.196
524
0.349
987
0.545
1575
0.777
2197
RECT.
0.972
2807
Q
∆
∆
2
___
(
)
P
P =
F =
K
Velocity
F-Factor
(fpm)
(amp.)
2315
2.99
2509
2.82
2669
2.25
2672
2.25
2828
2.01
2795
2.05
2888
1.92
3009
1.77
2808
2.03
2931
1.87
2910
1.89
Velocity
F-Factor
(fpm)
(amp.)
2322
2.98
2509
2.81
2673
2.24
2828
2.01
2890
1.92
2828
2.01
2890
1.92
4005 x A
2
________
(
)
K
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