Intake (28" of water, clay radius to repeat) .100" - 69 cfm .200" - 127 cfm .300" - 175 cfm .400" - 208 cfm .500" - 224 cfm .600" - 235 cfm Exhaust (28" of water, 1.75" pipe to repeat) .100" - 60 cfm .200" - 117 cfm .300" - 172 cfm .400" - 199 cfm .500" - 212 cfm .600" - 222 cfm