In a building with 10.000 cubic feet where the air changes every two hours, what the rate of air change? A. 167.7 cfm B. 83.3 cfm C. 133.3 cfm D. 50 cfm


  1. Answer:

    Flow rate of air is given as 83.33 cubic feet per minute


    As we know that total volume of the air flow is given as

    V = 10,000 cubic feet

    also we know that total time is

    t = 2 hours = 120 min

    now we have flow rate given as

    Q = \frac{V}{t}

    Q = \frac{10000}{120}

    Q = 83.3 cf/m

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