You are a person who likes enforcing rules so take a summer

You are a person who likes enforcing rules so take a summer job as a HVAC insector. The minimum fresh air requirement of a residential building in Dayton is 0.35 air changes per hour. Find the flow capacity required for a single fan to provide sufficient fresh air to a 600 m^3 home If the maximum air velocity is 4 m/s, determine the limit on the diameter of the duct that will provide this capacity

Solution

a) Quanity of air = changes of air * Room volume * 1000 / 3600

    Flow capacity = 0.35 * 600 / 3600    = 0.058333 m^3/s

b) Area * Velocity = 0.058333

    Area = 0.058333 / 4 = 0.0145833 m^2

    pi * d^2 /4 = 0.0145833 m^2

    d = 0.1362 m