Brian, As far as I know, there is no standard which *forces* you to have an air filter and, based upon your product's technology and expected life, you may not need one.
However if you are designing with forced air cooling, have a long life expectancy (5+ yrs), and any type of fine pitch devices, you will need to filter the air in order to maintain reliable operation. If you can pass the Airborne Contaminants section of GR-63 without an air filter, it would indicate that you do not need one. Marko Radojicic email: ma...@caspiannetworks.com phone: 408/382-5206 fax: 408/382-5593 -----Original Message----- From: brian.mcauli...@tellabs.com [mailto:brian.mcauli...@tellabs.com] Sent: Thursday, September 21, 2000 9:36 AM To: nebs@world.std.com Subject: Air filters Can somebody answer this simple question: Under what circumstances, if any, are you obliged to have an air filter in your product ? What standard and clause(s) specify this requirement ? Brian McAuliffe Tellabs
