Chapter 4 of the IMC governs the ventilation of spaces intended to be what?

Chapter 4 of the International Mechanical Code (IMC) is specifically focused on the ventilation requirements for spaces that are intended to be occupied. This chapter establishes guidelines to ensure that indoor air quality is maintained at a level that protects the health and safety of occupants.

Ventilation in occupied spaces is critical because these areas require an adequate supply of fresh air to dilute contaminants, manage humidity levels, and ensure overall comfort and safety for the occupants. The code addresses various factors such as air exchange rates, types of ventilation systems, and air quality standards, all tailored to enhance the conditions of spaces that people regularly use.

While uninhabitable, commercial, and industrial spaces may also have specific ventilation needs, the primary emphasis of Chapter 4 is on areas where individuals work, live, or otherwise spend significant amounts of time. This distinction underscores the importance of human occupancy when establishing ventilation standards and practices.