Yes, and they are easy to screw up. You'll want to discuss with a local HVAC contractor or consultant, consider looking up the local chapter of their professional organization, ASHRAE, at http://www.ashrae.org/members/page/333 to find one. I'm a construction consultant, and I always have one of these guys on speed dial for museum projects. Being local is important with this question. JG -----Original Message----- From: Museum discussion list [mailto:[log in to unmask]] On Behalf Of Shyra Sent: Sunday, July 06, 2008 1:10 PM To: [log in to unmask] Subject: [MUSEUM-L] Smoke Test Help! Does anyone have experience conducting a smoke (or some type of airborne particulate) test as a means to determine the air exchange within a space (a display case is what we're dealing with)? If so, where might one find materials for such a test? Or what about any other techniques used to measure case air exchange? Any tips are much appreciated! Thank you! ========================================================= Important Subscriber Information: The Museum-L FAQ file is located at http://www.finalchapter.com/museum-l-faq/ . You may obtain detailed information about the listserv commands by sending a one line e-mail message to [log in to unmask] . The body of the message should read "help" (without the quotes). If you decide to leave Museum-L, please send a one line e-mail message to [log in to unmask] . The body of the message should read "Signoff Museum-L" (without the quotes). ========================================================= Important Subscriber Information: The Museum-L FAQ file is located at http://www.finalchapter.com/museum-l-faq/ . You may obtain detailed information about the listserv commands by sending a one line e-mail message to [log in to unmask] . The body of the message should read "help" (without the quotes). If you decide to leave Museum-L, please send a one line e-mail message to [log in to unmask] . The body of the message should read "Signoff Museum-L" (without the quotes).