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CASSETTE
Field Supplied
Fan Static Pressure Requirements:
Static pressure required at Cassette
25 ft. 4" duct + intake=45ft. TEL x .04/100 = .018 in W.C.
Fan Selection:
Select fan to deliver 15 CFM @ approximately .26 in W.C.
Static pressure requirements will vary with duct length and
inlet conditions.
NOTE: Filter for outside air required. Add filter static pressure loss to static
pressure requirements above.
CEILING CASSETTE
OUTSIDE (FRESH) AIR INTAKE
4" Duct
Fan
2.75" x 4"
Transition
15 CFM
Outside (Fresh)
= .24 in W.C.
TOTAL =.258 in W.C.
58.8 Pa
.24 in W.C.
Air Intake
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