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I posted this question yesterday and got several responses, but only one that truly addressed the issue. Question: In order to conserve energy my school system has asked that all teachers turn their classroom thermostats down at night and this summer when school is out we'll be asked to turn them up to 75. I didn't adjust the library temperature when I left yesterday, but apparently the janitor did. Where can I find documentation to show my administration that the library should stay at a constant temperature. And what is that temp. exactly? I try to keep it around 70-71 degrees. Answer: The key is not so much temperature as humidity level. I see you're in Tennessee. We are in Florida and certain times of the year-summer especially-the humidity is very high. Leaving the temperature higher at these times is an open invitation to mold and mildew. We keep a humidistat in the library and have one on our thermostat and try to keep the humidity below 65%. Some sources recommend even lower parameters. See http://www.nelib.org/netsl/pastprograms/preservationtechniques.htm which reports "Fluctuations of heat and humidity also accelerate deterioration, including mold growth. Temperatures should not rise above seventy degrees, as measured with a real thermometer, not an often unreliable thermostat. Humidity levels should remain between 30 and 50 percent." Anne M. Timbs Library Media Specialist Roan Creek Elementary Mountain City, TN timbsa@k12tn.net -------------------------------------------------------------------- Please note: All LM_NET postings are protected by copyright law. You can prevent most e-mail filters from deleting LM_NET postings by adding LM_NET@LISTSERV.SYR.EDU to your e-mail address book. To change your LM_NET status, e-mail to: listserv@listserv.syr.edu In the message write EITHER: 1) SIGNOFF LM_NET 2) SET LM_NET NOMAIL 3) SET LM_NET MAIL 4) SET LM_NET DIGEST * Allow for confirmation. * LM_NET Help & Information: http://www.eduref.org/lm_net/ * LM_NET Archive: http://www.eduref.org/lm_net/archive/ * EL-Announce with LM_NET Select: http://lm-net.info/ * LM_NET Supporters: http://www.eduref.org/lm_net/ven.html * LM_NET Wiki: http://lmnet.wikispaces.com/ --------------------------------------------------------------------