Performance Factor Table

FORCED CONVECTION, AIR VELOCITY (ft/min)
EXTRUSION LENGTH (in) NATURAL CONVECTION 100 200 300 400 500 600 700 800 900 1000 1100 1200
0.25 242.20 183.33 129.63 105.84 91.66 81.98 74.84 69.29 64.81 61.11 57.97 55.27 52.92
0.50 171.27 129.63 91.66 74.84 64.81 57.97 52.92 48.99 45.83 43.21 40.99 39.08 37.42
1.00 121.10 91.61 64.77 52.89 45.80 40.96 37.40 34.62 32.38 30.53 28.97 27.62 26.44
2.00 85.63 64.89 45.88 37.46 32.44 29.02 26.49 24.52 22.94 21.63 20.52 19.56 18.73
3.00 69.92 52.88 37.39 30.53 26.44 23.64 21.58 19.98 18.69 17.62 16.72 15.94 15.26
4.00 60.55 45.81 32.39 26.45 22.90 20.49 18.70 17.31 16.19 15.27 14.48 13.81 13.22
5.00 54.16 40.99 28.98 23.66 20.49 18.33 16.73 15.49 14.49 13.66 12.96 12.36 11.83
6.00 49.44 37.39 26.44 21.58 18.69 16.72 15.26 14.13 13.22 12.46 11.82 11.27 10.79
7.00 45.77 34.61 24.47 19.98 17.30 15.48 14.13 13.08 12.23 11.53 10.94 10.43 9.99
8.00 42.82 32.39 22.90 18.70 16.19 14.48 13.22 12.24 11.45 10.79 10.24 9.76 9.35
9.00 40.37 30.53 21.58 17.62 15.26 13.65 12.46 11.53 10.79 10.17 9.65 9.20 8.81
10.00 38.30 28.97 20.48 16.72 14.48 12.95 11.82 10.94 10.24 9.65 9.16 8.73 8.36
11.00 36.51 27.62 19.53 15.95 13.81 12.35 11.27 10.44 9.76 9.20 8.73 8.32 7.97
12.00 34.96 26.44 18.69 15.26 13.22 11.82 10.79 9.99 9.34 8.81 8.36 7.97 7.63
13.00 33.59 25.40 17.96 14.66 12.70 11.36 10.37 9.60 8.98 8.46 8.03 7.66 7.33
14.00 32.37 24.48 17.31 14.13 12.24 10.95 9.99 9.25 8.65 8.16 7.74 7.38 7.06

NOTE: For lengths and flow velocities not shown, the equation P.F. = 916 / performance factor table may be used.