2025 AHIT Practice Test - Complete Exam Preparation

A home inspector checks HVAC systems to determine air quality in a home because these systems play a critical role in the circulation and filtration of air throughout the living environment. Properly functioning HVAC systems help maintain good air quality by regulating temperature, humidity, and by filtering out pollutants and allergens from the air. Additionally, an inspector would assess for potential issues such as mold growth or the presence of dust and particulate matter in the ducts, which can significantly affect occupants' health and comfort.

While insulation levels, the number of windows, and wall paint quality can have an indirect impact on air quality by influencing thermal comfort and moisture retention, they do not directly assess or affect air quality in the same capacity as the HVAC system does. For instance, while insulation can help with energy efficiency, it does not actively purify or circulate air. Similarly, the presence or number of windows can contribute to ventilation but does not replace the need for a functioning HVAC system that actively manages air pollutants. Wall paint quality, while it may affect the aesthetic appeal and potential for volatile organic compounds (VOCs), does not serve as a primary indicator of air quality either.