And yes DR.RTU this is a return exhaust fan. I have 2 24x24 intake ducts on the top of airhandler going 70 feet to the exterior of the building and a 20x72 exhaust duct that transitons to 24x48 then out to the exterior of the building seventy feet also.
Tomorrow I am going to take a scan of...
Ok here it goes. Fan size is 5hp belt driven 32" diameter 10 blade . I have 2- 26"x26" ducts coming into a 36x42-36 duct. at the end of that duct is the first silencer 36x42-60. then a 2 ft square to round into the fan 36x42-32". out of the fan an identical square to round to another identical...
I have just completed a university project. Air balancing contractor is coming back with excessive resistance on REF1.
REF1 is a booster behind the mixing box on 30ton air handler. REF1 is rated for 11,000 cfm. On each side of REF1 I have and Industrial accoustics 5ES silencer 42x36-60 with a...
