Your client, owner of a popular theme park $($e$.$g$.$ Disney World, Universal Studios$)$ is planning a hotel

project on the property. The hotel will have an atrium $($think Luxor, Embassy Suites, etc.$)$ with a diameter of

$200-$feet and will be seven stories in height $(12-$ft$.$ height floors$).$ The requirement for smoke control in case

of a fire is to be able to completely evacuate the smoke from the atrium area in thirty minutes. Referring

back to Chapter $8$ in your text $(6$th Edition$),$ in Figure $8\mathrm{.}15$ you are looking with the MEPP design team at a

fan with $15,000$ cfm volume @ $1125$ rpm$.$ How many of these fans will need to be installed in order to meet

this design condition?