Susan, Our vault system is exactly the same kind of system. It replaced a pan system years ago, because the pan system started leaking. I was not here for that, but my understanding is that a pan system involves the air blowing over standing water insted of injection of steam into the air stream, as in the Liebert unit. I personally do not like the idea of standing water anywhere near my art, but I guess it would depend on where the unit is in relation to the objects. We too have to replace the filter periodically, but I would wonder if that is outweighed by the maintenance required for the pan system. Are your people suggesting that there will be a significant reduction in maintenance cost/time involved? Mark Janzen Registrar/Collections Manager Edwin A. Ulrich Museum of Art Martin H. Bush Outdoor Sculpture Collection Wichita State University (316)978-5850 Susan English <s.english@JOLIET MUSEUM.ORG> To Sent by: Museum [log in to unmask] discussion list cc <[log in to unmask] SE.LSOFT.COM> Subject Liebert Units 03/04/2005 10:19 AM Please respond to Museum discussion list <[log in to unmask] SE.LSOFT.COM> Does any one on the list have experience with Liebert hvac units? We have a unit that provides heating, air conditioning and humidity to one of our galleries. We have the steam canister type. Since we run our unit continuously, the steam canisters get mucked up with lime deposits from the hard water and need to be replaced every 500-1000 hours. Our hvac contractor is recommending we replace the canister system with a pan system, which would require maintenance but not replacement. Any body out there have experience with Lieberts? Thanks. Susan English Executive Director Joliet Area Historical Museum ========================================================= 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).