Where is your facility/museum located (town, state)? That may make a difference in the recommendation. 65 degrees is really cold for the summer. Depending upon your specific situation and lay-out of HVAC equipment & duct work, I would guess that you are getting condensation on the ductwork, which is causing the ceiling to be wet from dripping above it. This is relatively common, but is not always noticed. Do the ducts run near the spots? What type of ceiling do you have - plaster, drywall, suspended, something else? How does the moisture show up - damp spots, water dripping, mold growing, something else? The more info you can present, the better the answer. Of course, nothing beats in-person observation.Marc
American Conservation Consortium, Ltd.
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Fellow, American Institute for Conservation (AIC)From: [log in to unmask]" href="mailto:[log in to unmask]" target="_blank">charlene martinSent: Tuesday, August 25, 2015 10:58 AMTo: [log in to unmask]" href="mailto:[log in to unmask]" target="_blank">[log in to unmask]Subject: [MUSEUM-L] HVAC settings for mixed collection storage roomsThank you!Is this good for a mixed collection storage room? Has anyone heard of this causing moisture to be gathering in spots on the ceiling?I have set my HVAC for 65 degrees with a 5 degree season shift, and he relative humidity for 50% with a 5 percent seasonal drift.Hi everyone -I have one storage room for housing textiles, paper documents, books, and mixed-medium artwork.
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