To limit the probability of an inadequate number or placement of warm-air supply outlets, which could lead to an inadequate distribution of warm air in crawl spaces, which could lead to temperatures in certain areas of the basement falling below the minimum indoor air temperatures [see Sentence 9.33.3.1.(1)], which could lead to condensation, which could lead to deterioration, which could lead to compromised structural integrity, which could lead to harm to persons.