Gas Powered Exhaust Fan Super Vac Model 720G4 The Is a positive pressure ventilation (PPV) fan that features a 20" cast aluminum airfoil blade and a commercial Tecumseh 5.5 HP gas motor, 18060 CFM airflow, the spun steel shroud is adjustable to angle up to 18 degrees, A steel frame, Full roll cage design and heavy gauge steel grill ensure safety and durability, Very portable
