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Old Dec 18, 2009, 12:16 PM
I make bad look so good.
SteveC68's Avatar
League City, Texas
Joined Sep 2006
2,595 Posts
FSA Calculator

Here is a simple Excel spreadsheet that calculates FSA of a ducted fan. I see people ask how to calculate FSA a lot. This spreadsheet will give you 100% FSA down to 70% FSA in 5% increments. Only input the diameters of the fan shroud and the fan hub (green cells). The fan hub diameter should be the largest diameter of the hub as some fans have a pointed tip.

I have updated this spreadsheet. It now also calculates exhaust diameter at different percentages of FSA from 100% down to 70% in 5% steps. This is done for both a single exhaust outlet and a bifurcated (two outlets from one fan) exhaust.

Somehow I deleted this spreadsheet a while back. Sorry about that.
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Last edited by SteveC68; Sep 11, 2011 at 11:35 AM.
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Old Aug 17, 2013, 08:42 PM
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India, SK, Gangtok
Joined Feb 2013
105 Posts

Thanks. Much appreciated
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Old Jun 21, 2014, 06:59 PM
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Joined Nov 2007
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Thanks! Glad to have run across this
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