Chapter 9:                      Ventilation

This chapter discusses ventilation, fans, termination fittings, ducts, and passive vents.

This chapter covers these 4 types of ventilation.

1.      Local ventilation

2.      Whole-dwelling ventilation

3.      Attic and crawl space ventilation

4.      Ventilation for cooling

Before installing a mechanical whole-dwelling ventilation sys­tem, read “Health and Safety” on page 21 for more information on controlling the sources of moisture and indoor air pollutants.