Which of the following is a true statement regarding fabric duct systems?
a. The material cost of a fabric duct system is typically 10 percent more than an equal sheet metal duct
system.
b. Fabric duct materials require special cleaning processes using low-pressure steam.
c. Most fabric duct systems are located outside of the conditioned space.
d. Porous versions of duct material stay cleaner since dust cannot easily settle on the duct.
d. Porous versions of duct material stay cleaner since dust cannot easily settle on the duct.
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