View Full Version : Amp draw and CFM of stock fans?

10-04-2011, 03:20 AM
Anyone know where to find this at or have it?

Trying to figure out what the stock CFM and amp draw on a stock ST162 fan. Reason is I just bought (and returned) a 12" reversible fan from CSK. It's CFM was 800/675(When pulling through radiator) and 8.8 peak amp draw.

The two I just ordered are 12" reversible fan, 1600CFM (nothing listed for through radiator) at a 6 peak amp draw.

10-11-2011, 03:50 AM
Hard o figure that one out unless the info was on the label.

Allot of things go into the amount of air a given fan can move - obviously the area and RPM (HP - Amps) are major factors, but the blade design is also a big driver, along with the design of the outer shroud that encloses the blades - less space between the blade tips and that shroud equal more CFM for all other parameters being equal.

A good way to estimate it would be to find a fan of similar size and blade configuration that has published data.

10-11-2011, 05:56 AM
current draw is easy, CFM's will be harder to figure out