What is the required exhaust ventilation rate per square meter of floor area?

What is the required exhaust ventilation rate per square meter of floor area?

• A. 0.1
• B. 0.5
• C. 0.3
• D. 1.0

Answer: (C)

Ventilation rate per unit floor area is a way to size exhaust so that heat and any contaminants from electrical equipment are removed reliably without wasting energy. The standard used in these questions expresses this as a fixed amount of air per square meter of floor area. In this case, that rate is three tenths of a liter per second for every square meter of floor. That means the total exhaust flow scales with the room's size: multiply the floor area by three tenths of a liter per second to get the required flow. For example, a room of twenty square meters would require about six liters per second. Values much lower would under-ventilate and risk overheating or buildup, while higher values would be unnecessarily energy-intensive; three tenths per square meter is the appropriate, balanced rate.

Ventilation rate per unit floor area is a way to size exhaust so that heat and any contaminants from electrical equipment are removed reliably without wasting energy. The standard used in these questions expresses this as a fixed amount of air per square meter of floor area. In this case, that rate is three tenths of a liter per second for every square meter of floor. That means the total exhaust flow scales with the room's size: multiply the floor area by three tenths of a liter per second to get the required flow. For example, a room of twenty square meters would require about six liters per second. Values much lower would under-ventilate and risk overheating or buildup, while higher values would be unnecessarily energy-intensive; three tenths per square meter is the appropriate, balanced rate.