Path: utzoo!telecom-request Date: Tue, 21 May 91 06:24:19 PDT From: "Louis J. Judice 21-May-1991 0916" Newsgroups: comp.dcom.telecom Subject: Re: Myths About Halon Message-ID: Organization: TELECOM Digest Sender: Telecom@eecs.nwu.edu Approved: Telecom@eecs.nwu.edu X-Submissions-To: telecom@eecs.nwu.edu X-Administrivia-To: telecom-request@eecs.nwu.edu X-Telecom-Digest: Volume 11, Issue 387, Message 4 of 11 Lines: 20 One more quick word on Halon systems. There's a big difference in the destructive velocity that Halon is discharged with, depending up the design and implementation of the system. Generally, the cost of a system is directly proportional to the number of nozzles. Low bid installations with 2-3 nozzles in a 5000 sq ft room will release with destructive force. Better systems with many nozzles with almost instantly fill the room with no ill-effects. I've seen $15,000 microscopes smashed and nearly a hundred ceiling tiles dislodged in the test of a low-cost halon system at my former employer. The system I installed in a DEC facility several years ago, though, was much more expensive, and caused no damage. I hope this is some help to those with halon systems. I certainly understand the environmental issues, but I sure hope CO2 is not re-established for this purpose, since it is definitely dangerous. ljj