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intake air and exhaust issues

thread1043-304513

intake air and exhaust issues

intake air and exhaust issues

(OP)
I have a 1700 c.f. enclosed space. There are 2 ac compressors mounted on the floor producing a combine exhaust output of 3400 cfm. I have a six square foot intake opening at floor level. How many cfm exhaust fan would be required to pull out the heat and how large of an intake opening would it take to equalize the exhaust?
We'll assume at this point there is zero heat gain coming through the roof.

RE: intake air and exhaust issues

Since there has been no reply, there must reasons and I can think of a few.  Nonetheless, excluding heat transmission thru roof and walls, heat generated from electric motors and compressors, you would need at least 3400 cfm fan to remove the heat generated from the AC's exhaust output assuming the output is within the enclosed room.  Assuming the exhaust fan has no ducts,louvers, grills, filters and dampers restricting air flow in and out from the enclosed room, the 3400 cfm would free air delivery.
Not  being familiar with the area where the fan is to be installed, the intake and outlet size openings of 6 sq.ft may be reasonable as the air velocity would be around 600 fpm.
 

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