North Carolina Home Inspector Practice Exam

What potential hazard is associated with open duct work in a living area?

1. Increased heating costs

2. Potential for increased humidity

3. Introduction of carbon monoxide into the living space

4. Reduced air circulation

The correct answer is: Introduction of carbon monoxide into the living space

Open ductwork in a living area poses a significant potential hazard because it can introduce harmful gases, such as carbon monoxide, into the living space. Carbon monoxide is a colorless, odorless gas that can lead to serious health effects or even death if inhaled in significant quantities. Open ducts can allow exhaust gases from appliances, particularly those that burn fuel, to enter the living area, creating an unsafe environment for occupants. In addition, because the ductwork is not sealed, it can lead to a less efficient heating and cooling system, but the primary concern remains the safety risk associated with exposure to toxic gases that can compromise indoor air quality. This highlights the importance of proper ventilation and ensuring that all ductwork is appropriately sealed and maintained to prevent hazardous conditions.