Which of the following are the primary means by which indoor air quality is maintained in HVAC systems?

The primary means by which indoor air quality is maintained in HVAC systems encompass several key processes, and option B accurately includes these essential components: filtration, ventilation, air exchange, and space pressurization.

Filtration is crucial as it helps to remove particulate matter such as dust, pollen, and other pollutants from the air, thus contributing to cleaner air within the indoor environment. Ventilation involves bringing in fresh outdoor air to dilute indoor air pollutants and ensure a supply of oxygen, which is vital for occupant health and comfort.

Air exchange refers to the process of replacing stale indoor air with fresh outdoor air, which helps in reducing the concentration of pollutants that accumulate over time. This is especially important in healthcare settings, where maintaining a specific air quality level is critical for patient safety.

Space pressurization ensures that the right pressure balance is maintained within different areas of a building, which can help control the movement of air and prevent contaminants from spreading between spaces. This is particularly significant in healthcare facilities where certain areas, like operating rooms or isolation units, require strict control over air quality and infection prevention.

Although other options contain relevant terms associated with HVAC systems, they do not encompass all the vital components needed to effectively maintain indoor air quality. For instance, while heating and cooling