Step 10 — 150-cfm fan (fractional horsepower) is sufficient for the air supply device. It should be capable of delivering air at a discharge pressure of a 4 to 6-inched water column. (Barry Byers)
Step 10 — 150-cfm fan (fractional horsepower) is sufficient for the air supply device. It should be capable of delivering air at a discharge pressure of a 4 to 6-inched water column. (Barry Byers)