From: DCHAS Membership Chair <membership**At_Symbol_Here**DCHAS.ORG>
Subject: [DCHAS-L] Need help on a ventilation problem
Date: Tue, 21 Aug 2018 07:54:47 -0400
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: 66F8E0A5-06FE-47A6-9148-86025838DDB8**At_Symbol_Here**

From: Monona Rossol
Re: Need help on a ventilation problem

IČ??ve been asked if two large laser cutters can be branch-ducted together. The problem is they will be used to cut wood, plastic, leather, and metal at various times. This means metal fumes can be in the ducts at the same time as smoke from potentially combustible materials. Since the metal will be in a fume, that is, a metal oxide form, it isnČ??t clear that the combination would be hazardous.

Any and all opinions on the potential hazards or lack thereof are eagerly awaited.

Monona Rossol in Amherst teaching the art safety course.

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