Chapter 16Duct Systems

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Question 1 1.

Which of the following standards applies to factory-made ducts for above-ground duct systems?

Question 2 2.

Question 3 3.

Question 4 4.

Always permitted for return air ducts.
Only if the air temperature exceeds 150°F (66°C).
Provided air temperature does not exceed 125°F (52°C) and surfaces are not subject to condensation.
Never permitted for duct construction.

Question 5 5.

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0 of 5 answered