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All-air systems

Which of the following is NOT a basic type of all-air systems that would be used for larger buildings? Choose 2
A. VAV, B. Reheat system, C. Electric resistance
D. Dual-duct, E. Multizone, F. Hydronic Radiant


Answer: C and F are not air systems, but electric and water-transfer types. Forced air systems include: VAV (variable air volume system), Dual-duct (high velocity) system, Reheat (constant volume), and Multizone system.
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