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ULTRASMART™ DC Motor and Control Technology

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Published on May 22, 2014

www.broan.com/ultragreen www.nutone.com/ultragreen

Today's green building requirements demand specific ventilation performance, so it's important that your ventilation fan deliver full-rated airflow. ULTRAGREEN™ Series Ventilation Fans with ULTRA Smart™ DC Motor and Control Technology continually monitor their performance and adjust motor speed to ensure the air movement you expect is delivered in almost any type of installation. You may not always know the ducting situation but our ULTRA Smart™ DC Motor and Control Technology will compensate for less-than-ideal circumstances.


Like our single-speed versions, models featuring our multi-speed control technology also take care of excess humidity and odors. However, when you also need to meet whole-house ventilation requirements, multi-speed models feature a continuous CFM adjustment dial that allows you to precisely set the airflow as low as 30 CFM to satisfy any inspector or rater. this capability also translates to happy homeowners as there is no costly over-ventilating or unhealthy under-ventilating.

Once the homeowner has turned an multi-speed fan on high for maximum humidity and odor ventilation, a second dial beneath the grille controls how long it will run at maximum CFM before returning back to the pre-set, lower continuous level. Both of these dials only need to be set once.

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