Appion AY0036 - 7 10-Blade Fan Gearbox Assembly with Fan Blade Model AY0036 Custom 7-inch, 10-blade turbine fan Able to blast over 700 cfm of high static cooling air through the machine Replacement fan for G1 Single and G5 TwinNew and improved fan delivers more cooling power and reliability than ever before. A custom 7-inch, 10-blade turbine fan is able to blast over 700 cfm of high static pressure cooling air through the machine.