Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!seismo!rutgers!mit-eddie!zrm
From: zrm@eddie.MIT.EDU (Zigurd R. Mednieks)
Newsgroups: comp.sys.mac
Subject: Re: Summary:  MacFans
Message-ID: <5546@eddie.MIT.EDU>
Date: Fri, 17-Apr-87 18:25:40 EST
Article-I.D.: eddie.5546
Posted: Fri Apr 17 18:25:40 1987
Date-Received: Sun, 19-Apr-87 12:59:22 EST
References: <MS.V3.18.cl1x.80022013.speers.ibm032.1018.1@andrew.cmu.edu>
Reply-To: zrm@eddie.UUCP (Zigurd R. Mednieks)
Organization: MIT, EE/CS Computer Facilities, Cambridge, MA
Lines: 26

There are some fundamental questions I would like to raise about the
desirablity of putting an aftermarket fan on one's Macintosh:

	1)	Can a fan do harm to a Macintosh? All the fans I have
		seen suck unfiltered air through the machine. They draw
		the air not only through the bottom side vents, but the
		floppy dirve as well. Do the greased parts of the floppy
		or the read/write head like this treatment?

	2)	Are fans effective in all parts of the Macintosh? Try the
		following experiment: Light a cigarette and puff some smoke
		toward the top vents of a Macintosh with an add-on fan.
		The smoke will probably be drawn down into the Macintosh.
		So, do fans really work, or do they just muck up the
		convection cooling (or is it a little of both)?

	3)	Is a Macintosh wothout a hard disk inside it really in need
		of a fan? My home machine was upgraded to 2Mb from 512k
		and I passed on the fan because of my doubts on items 1)
		and 2). It still computes as happily as ever. Do I really
		need a fan?

	4)	Catching fire is not always a symptom of overheating. What
		really causes analog boards to burn down?

-Zigurd