PROBLEM: Librarian reported high relative humidity levels that were damaging valuable archive materials.

SOLUTION: Carolina Heat Pipe, Inc. retrofitted a two (2) row Thermosyphon Run Around Heat Pipe (TRAHP™ ) system into a 14840 CFM Carrier Air Handler, 39W12749R Multizone Central Station with chilled water and steam coils.

RESULTS: This installation, along with the addition of a variable frequency drive, changed the specific heat ratio so that the library would maintain 50% relative humidity and prevent further damage to the materials, all without additional energy consumption.

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