A client is noticing black particulate coming out of the diffusers and ending up on desks. During the initial inspection, the ASCS should pay close attention to the:
A. condition of the ceiling tiles.
B. condition of the internal duct insulation.
C. condition of the external insulation on the return.
D. closed cell foam insulation covering the AC line set.
A client is noticing black particulate coming out of the diffusers and ending up on desks. During the initial inspection
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