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bigben2k · 05-30-2002, 07:04 AM

Glad you asked.

cross-flow fans are much harder to find, but they are very often used in AC units, so they should be easily available that way.

Those fans can easily reach 100 cfm, with less than 30 DB noise. Regardless, since they have to have a housing to cover them, whatever noise they make could easily be isolated.

Mounted on top of a rad that sits at the bottom of a case, they can suck air in from the front, where you can put your air filter.

I have found 2 types of crossflow fans: one with straight fins, and another with curved or angled fins. the later performs better, but will not run nearly as efficiently in reverse.

An alternative would be a squirrel cage (same principle) fan. These are very common as fans for car interiors. Again, because they have to be encased (a little fiberglass work?), whatever noise they make can easily be isolated.

Papst makes some of these, but there are many other manufacturers of these "tangential" or "cross-flow" fans. They are available in a wide variety of sizes, and I've seen 24" drums on the web. The one you found would be a little big, no?

05-30-2002, 07:04 AM	#8
bigben2k Responsible for 2% of all the posts here. Join Date: May 2002 Location: Texas, U.S.A. Posts: 8,302	Glad you asked. cross-flow fans are much harder to find, but they are very often used in AC units, so they should be easily available that way. Those fans can easily reach 100 cfm, with less than 30 DB noise. Regardless, since they have to have a housing to cover them, whatever noise they make could easily be isolated. Mounted on top of a rad that sits at the bottom of a case, they can suck air in from the front, where you can put your air filter. I have found 2 types of crossflow fans: one with straight fins, and another with curved or angled fins. the later performs better, but will not run nearly as efficiently in reverse. An alternative would be a squirrel cage (same principle) fan. These are very common as fans for car interiors. Again, because they have to be encased (a little fiberglass work?), whatever noise they make can easily be isolated. Papst makes some of these, but there are many other manufacturers of these "tangential" or "cross-flow" fans. They are available in a wide variety of sizes, and I've seen 24" drums on the web. The one you found would be a little big, no? __________________ WBTA (Water Block Testing Alliance) Nordic Hardware WC 101 Last edited by bigben2k; 05-30-2002 at 07:09 AM.