Owners Manual Ecos
aire
®
CM Series Precision Air Conditioner
Moisture Migration Building Construction
Ecos
aire
®
July 2007 15
Data subject to change without notice.
DESCRIPTION
In order to prevent moisture migra-
tion, the room (including the ceiling
plenum, if any) must have a sealed
vapor retarder. Rooms with concrete
walls or floor should be painted with a
rubber- or plastic-based paint. Doors
should seal tightly and must not have
grilles in them.
Light fixtures must be selected to pre-
vent overheating, and should not allow
room air to escape into the ceiling
plenum.
Because of the small number of per-
sonnel in a typical computer site, out-
door air should be reduced to less than
5% of the total circulated air. If outdoor
air is introduced, it must be filtered. The
effect of bringing in outdoor air must be
added to the cooling and dehumidifica-
tion loads.
Measures should be taken to prevent
dirt and dust from affecting equipment
reliability. Printers, bursters, copy
machines and other paper handling
equipment should be located in areas
removed from disc drives and similar
equipment.
DEW
POINT
CONDENSATION
RESULTS IN
SOGGY
INSULATION
OUTDOOR 32°F
DRY
INSULATION
OUTDOOR 32°F
NO VAPOR
RETARDER
INDOOR AIR 70°F
VAPOR
RETARDER
INDOOR AIR 70°F
DEW
POINT
