Outside exhaust openings, including bath, toilet, domestic kitchen range and domestic dryers shall be located at least _____ feet from doors, openable windows and non-mechanical intake openings.

Outside exhaust openings, including bath, toilet, domestic kitchen range and domestic dryers shall be located at least _____ feet from doors, openable windows and non-mechanical intake openings.

• A. 3
• B. 10
• C. 4
• D. 12

Answer: (A)

The main idea is to keep exhaust outlets sufficiently separated from places where air can be drawn back into the building. When you vent bathroom, toilet, kitchen range, or dryer exhaust, closing doors or opening windows can create pressure differences that pull exhaust air back inside if the outlet is too close to those openings. A buffer distance of three feet provides enough separation to reduce the chance of backdraft or intrusion of moisture, odors, or contaminants into living spaces through doors, windows, or non-mechanical air intakes. The other distances listed would be larger than the minimum required and aren’t the standard ruling in this scenario, which is why three feet is the correct minimum.

The main idea is to keep exhaust outlets sufficiently separated from places where air can be drawn back into the building. When you vent bathroom, toilet, kitchen range, or dryer exhaust, closing doors or opening windows can create pressure differences that pull exhaust air back inside if the outlet is too close to those openings. A buffer distance of three feet provides enough separation to reduce the chance of backdraft or intrusion of moisture, odors, or contaminants into living spaces through doors, windows, or non-mechanical air intakes. The other distances listed would be larger than the minimum required and aren’t the standard ruling in this scenario, which is why three feet is the correct minimum.