Initial Resistance

0.07 in WG
0.07" WC
0.09 in WG
0.09 to 0.25 in WG
0.1 in WG at 120 fpm
0.12 to 0.41 in WG
0.12 to 0.43 in WG
0.13 in WG
0.13 to 0.45 in WG
0.13 to 0.49 in WG
0.14 to 0.34 in WG
0.14 to 0.51 in WG
0.15 in WG
0.15 in-WG
0.15 to 0.34 in WG
0.16 to 0.37 in WG
0.2 in WG
0.21 to 0.41 in WG
0.21"WC
0.22" WC
0.25 in WG
0.25 to 0.41 in WG
0.25" WC
0.26 in WG
0.26 to 0.5 in WG
0.26 to 0.51 in WG
0.26" WC
0.27" WC
0.28 in WG
0.28" WC
0.28"WC
0.3 in WG
0.30" WC
0.33 in WG
0.34 in WG
0.37 in WG
0.37" WC
0.38 in WG
0.39 in WC
0.39 in WG
0.4 in WG
0.41 in WG
0.44 in WG
0.45 in WG
0.46 in WG
0.48" WC
0.54 in WG
0.55 in WG
0.58 in WG
0.59 in WG
0.68 in WG
0.80" WC
1 in WG
1.4 in WG
1/4 in WC