This manual addresses the errors that occur during new construction that subsequently contribute to indoor air quality (IAQ) problems in newly constructed buildings in hot and humid climates, and offers guidelines for preventing them during the design and construction phases. It defines the roles and responsibilities of the design team, the contractor, and the building owner, and explains the integration of IAQ-related technology into the process of designing and constructing a building. The manual also examines the key issues surrounding IAQ problems in hot and humid climates followed by decision making considerations concerning moisture and mildew control that arise during each phase of the design and construction phases. Finally addressed are the moisture control considerations that should be evaluated in the post-construction startup and system commissioning phase as well as suggestions on commission planning and tests. (Contains 14 references.) (GR)