How many square feet of makeup air inlets are required for every 1,000 cubic feet per minute of smoke exhaust?

• A. 6
• B. 7
• C. 8
• D. 9

Answer: (C)

The requirement for makeup air inlets in relation to smoke exhaust is based on the principle of maintaining balance between air being exhausted and air being brought into the building. For every 1,000 cubic feet per minute of smoke exhaust, the code specifies that a minimum of 8 square feet of makeup air inlets is necessary. This ensures that there is sufficient fresh air to replace the air being removed by the exhaust system, helping to maintain proper air quality and pressure within the building.

The requirement for 8 square feet is derived from calculations that take into account the need for effective smoke control and ventilation. If there were insufficient makeup air, it could lead to negative pressure in the building, making it difficult for the smoke to be effectively exhausted and potentially jeopardizing occupant safety.

The other options do not comply with this requisite, as having fewer than 8 square feet would not provide adequate makeup air, potentially compromising the efficiency and safety of the smoke exhaust system.