my boss asked me to build a ventilation hood for him. i have built the hood but i am having trouble figuring out what size fan i need.
the hood has a plenum that is 12"X8"X60" the 60X8 side that faces down is perforated steel that is 23%open. on the top i have 2 opening 4' apart where 6"diameter ducts attach, these ducts go up 3" then turn 90 deg towards each other then go to a T where they connect and go 4' up to where the fan will attach. My boss wants the system to have a flow rate of 300 cf/m. can you help me figure what the cfm rating for the fan should be?
thank you very much