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.
4
Rockville Road
Broad Brook, CT
06016
www.conservator.com
860-386-6058
*Collections Preservation Consultation
*Conservation Assessments &
Surveys
*Environmental Monitoring & Low-Tech Control
*Moisture
Management Solutions
*Collections in Historic Structures
*Collections Care
Grant Preparation
*Conservation Treatment of:
Furniture
Painted Wood
Horse-Drawn Vehicles
Architectural Interiors
Decorative Objects & Folk Art
Marc A. Williams, President
MS in Art
Conservation, Winterthur Museum Program
Former Chief
Wooden Objects Conservator, Smithsonian Institution
Fellow, American Institute for Conservation (AIC)
Sent: Tuesday, August 25, 2015 10:58 AM
Subject: [MUSEUM-L] HVAC settings for mixed collection storage
rooms
Hi everyone -
I have one storage room for housing textiles,
paper documents, books, and mixed-medium artwork.
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.
Is this good for a mixed
collection storage room? Has anyone heard of this causing moisture to be
gathering in spots on the ceiling?
Thank you!
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