0.6 sones sound level|110 cfm reduces humidity to quickly eliminate fogged mirrors and manage moisture in bathrooms upto 105 sq-ft, so your vision will always be clear and your surroundings will always be comfortable|QStream technology state of the art blower design with airflow smoothing baffles optimally smooth's airflow and reduce turbulence so the wheel can turn more slowly and quietly with no airflow loss|QFlow technology duct connector damper flap is completely removed from airstream to reduce static pressure again, allowing the blower to turn more slowly and quietly, damper also seals against perimeter surfaces when closed to prevent backdrafts|ULTRAQuick installation technology uses an exclusive telescoping mounting frame with pre-installed screws, snap-in housing, snap-in blower and an inside-out mounting duct connector that deliver the fastest, easiest, most universal installation|Retrofit installations can be done entirely from the room side - no attic access required|Unique telescoping mounting frame can be placed and fastened through drywall hole because it expands from 14 to 24 in and fits any type of joist, I-Joist or truss construction for a "no guesswork" installation to make the work fast and easy|Snap-in housing and blower further simplify installation, easy-to-position carriage allows housing location adjustment between joists|Use over tubs and showers with a GFCI circuit, captures the steam before it spreads throughout the room|Plug-in, permanently lubricated motor engineered for continuous use|Compatible with radiation damper RDF1 which helps prevent flame and heat from spreading to other areas in multi-level buildings|UL listed for use over bathtubs and showers when connected to a GFCI protected branch circuit (ceiling mount only)|2 in x 8 in minimum construction space required|Horizontal duct direction