What are the relative humidity limits recommended for residences?
A. 20% to 40%.
B. 30% to 50%.
C. 40% to 60%.
D. 50% to 70%.
Answer: C
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In chimney construction, flashings are installed by the ____ who build the chimney.
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Aftermarket parts catalogs can be a useful source of information and they are usually _______
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