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REDUCE SOUND LEVELS AND IMPROVE
SOUND QUALITY IN REAL-WORLD INSTALLATIONS.
Pre-installed
screws in the
mounting frame
enable quick
installation
Without QFlow,
outdoor air can intrude
past the damper edges.
With QFlow, outdoor air
intrusion is blocked with
its edge-to-edge design.
Without QFlow, the flap
impedes airflow which
increases static pressure,
turbulence and noise.
With QFlow, the flap lifts out of
the way, minimizing turbulence
for more quiet operation.
ULTRA
PRO
™
FANS & FAN/LIGHTS
QFLOW
™
TECHNOLOGY MEANS SMOOTHER AIRFLOW
AND OPTIMAL BACKDRAFT SEALING.
QFlow
™
Damper Technology. Patent-pending QFlow technology helps achieve desired
building airtightness scores when the fan is off. It also removes the duct damper
flap from the airstream path, reducing static pressure and noise when the fan is on.
*Not available on 110 CFM UltraGreen Models
Without QStream
™
Technology
With QStream
™
Technology
FAN OFF FAN ON
The innovative, patent-pending
QStream
™
technology utilizes
airflow-smoothing baffles that
reduce turbulence which means
the blower can turn more slowly
and quietly—without airflow loss.*
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