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Factair™
Air Pattern Selection
These
pictures show an 8-inch diameter Model 100 with 1890 fpm supply velocity
and 660 cfm discharge. Air velocity measurements taken at the centerline
axis, 2 feet from the unit, were: (A) +1700 fpm; (B) +600 fpm; and (C)
-70 fpm.
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A. With the
Factair terminal outlet Vari-Damper™ airflow controller fully open, test smoke is
projected at full velocity through the base of the outlet in an axial, “straight-down”
pattern. Lateral airflow through the barrel perforations is negligible.
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B. With the
Vari-Damper airflow controller set at an intermediate position, a proportional amount of
airflow through the perforations combines with axial flow for a wider air pattern and decreased
direct velocity. The wide range of intermediate positions possible with the Vari-Damper airflow
controller allows an equally wide range of possible air patterns and velocities.
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C. With the Vari-Damper
airflow controller completely closed, all of the air is discharged through the barrel perforations,
producing a hollow-cone air pattern.
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