Where can i get a basic Industrial fan (Induced/forced) selection calculation?
fan selections are based on standard conditions. All you have to do is figure out the flow you need and the static pressure required based on the equal friction method or static regain method. Equal friction method is much easier and accurate enough. SMACNA has a duct design handbook that gives you losses through several types of fittings. You can use a manual ductulator to find friction loss in duct. You typically size the duct based on velocity/friction loss at about .8 in (pressure loss)/100 feet. Add it all up for the supply side and suction side of the fan. You can then go to a vendor or use an online selection program from Loren Cook, Greenheck, Twin Cities Fan, etc, and input your flow and static pressure required at standard conditions and it will spit out different selections, show you the brake horsepower, mechanical efficiency, rpm’s of the fan, dBA’s, and motor horse power. One thing you do have to do is figure out what type of fan you need. Inline, centrifugal, axial, and
