Duct systems can be made of galvanized metal, aluminum, fiberglass duct board, spiral metal, flexible duct or a combination of different materials
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Q5: _ in the duct slows the air
Q6: Motor drives can be _ or _
Q7: Forced air systems are made up of
Q8: Pressure in the ductwork is measured in
Q9: Forced air systems deliver the correct quantity
Q11: Forced air systems use different air every
Q12: Branch ducts deliver the proper amount of
Q13: The friction chart is used to properly
Q14: Typically, 400 cfm of air must be
Q15: Different spaces require the same air quantities
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