Our Slim Fit ENERGY STAR qualified bathroom fans operate at an exceptional low noise level and feature a contemporary low profile grille in three easy care finishes. Ideal for smaller joist spaces- fits 2″ x 6″ construction- and may be installed in a wall or ceiling. The detachable 4” to 6” round duct adaptor makes duct layout easier. Aero Pure Slim Fit fans are designed to fit minimum 2”’ x 6” construction, approved for installation in either an insulated ceiling or wall, Title 24 compliant, and meet ASHRAE 62.2, ENERGY STAR®, and LEED for Homes national standards for achieving acceptable indoor air quality in typical residences. An efficient and elegant solution to your ventilation needs whether you are building new or remodeling!