4-3.8.6
Multi-Zone
(1)
A. D e s c r i p t i o n :
Each control zone
h a s a separate duct from the
a i r handling equipment to the
control zone.
At the central
a i r handling equipment, warm
a i r and cool air are blended by
d a m p e r s to control the air
t e m p e r a t u r e being supplied to
t h e zone.
B.
Types:
central plant
packaged equipment
4-3.8.7 Double Duct (2)
A.
Description:
F r o m the central
a i r handling equipment there are
throughout the building, are
a pair of distribution ducts--
o n e with cool air and one with
w a r m air.
For each control
z o n e , a branch duct is taken
from each of the main ducts
t h r o u g h a terminal mixing unit,
and to the room in a common
duct.
B . Types:
low velocity, central plant
low velocity, packaged
equipment
medium velocity, central plant
medium velocity, packaged
equipment
4-11
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