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From: leo@Tandem.COM (Leo Hejza)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: A2000 internals, Fan, etc...
Message-ID: <1990Sep26.205350.18466@tandem.com>
Date: 26 Sep 90 20:53:50 GMT
References: <61050002@hpcljms.HP.COM> <934@sagpd1.UUCP>
Sender: news@tandem.com
Reply-To: leo@Tandem.COM (Leo Hejza)
Organization: Tandem Computers
Lines: 7

Actually its a fairly simple engineering question. When you pull air out
of an enclosure (read the fan blows outward) you are exhausting the
enclosure. When you push air into an enclosure (the fan blown inward)
you are pressurizing the enclosure. Typically muffin fans are used in
computer equipment and you can't pressurize and enclosure as efficiently with
one as you can exhaust an enclosure. To pressurize and enclosure you
have to use a squirrel cage fan.