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EGW05-SWHPEG-20140724
TM
TM
Supply Air
After dehumidification, dry air is supplied back to the room. Supply air should be distributed from ducting around the
perimeter (see Figure 1-1) of the space. The two options for perimeter supply air distribution are overhead (see Figure
1-2) or below grade (see Figure 1-3).
Figure 1-1. Perimeter Air Distribution
The warm, dry air should be directed over outside walls, windows and other surfaces susceptible to condensation. Supply
ducts should be as short and with as few turns as possible. Use turning vanes to minimize air noise and static pressure
drop.
Recommended maximum supply duct air velocity is 1000 FPM. The recommended velocity from diffusers is 300 to 500
FPM. Air velocities in ducts should be kept as low as is reasonable to avoid excessive noise in the ducts. In multiple unit
installations, supply air from each unit may go into a common supply duct or into a plenum. The duct should be attached
with a flexible connection to minimize vibration transmission.
Figure 1-2. Overhead Air Distribution
Figure 1-3. Below Grade Air Distribution
SUPPLY AIR BLOWING
DOWN FROM SOFFIT DUCTS
COVERING WINDOWS AND
MOISTURE-EXPOSED AREAS
SUPPLY AIR
TO SKYLIGHTS
POOLPAK
DEHUMIDIFICATION
SYSTEM
RETURN AIR
RETURN AIR
SUPPLY AIR
TO SKYLIGHTS
POOLPAK
DEHUMIDIFICATION
SYSTEM
SUPPLY AIR BLOWING UP
FROM BELOW-GRADE
DUCTS COVERING WINDOWS
AND MOISTURE-EXPOSED
AREAS
Sky Light