Where should exhaust ducts not be installed for safety reasons?

Exhaust ducts should not be installed in rooms with combustion appliances due to safety concerns related to air quality and the potential for hazardous gas buildup. Combustion appliances, such as furnaces or water heaters, can produce harmful exhaust gases like carbon monoxide, which can be extremely dangerous if not adequately vented outside.

If exhaust ducts are installed in these rooms, there is a risk of backdrafts or cross-contamination, where exhaust gases from the combustion appliance may enter the living space rather than being carried outside. This scenario can lead to serious health risks for occupants.

Additionally, areas like storage rooms, spaces without windows, and bathrooms, while they may have specific ventilation concerns, do not pose the same level of immediate danger as rooms containing combustion appliances. Ensuring proper ventilation in these spaces is important, but the critical nature of managing combustion gas safety elevates the need to avoid exhaust duct installation in rooms with these appliances.