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Chapter Eleven
Figure 11.3
Single-zone AHU.
Exhaust systems may serve a single space or multiple spaces, and
may include heat recovery, special filtration, and other special equip-
ment.
11.2
AHU System Arrangements
Air conditioning practice includes only five basic AHU arrangements,
although there are many variations on these basic concepts. Single-
zone and VAV systems have similar, even identical, physical arrange-
ments but use different control strategies. Multizone and double-duct
systems are similar in arrangement and concept but are different
enough to be considered separately. Induction systems are unique.
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