Soler and Palau Soler and Palau 4-1/2 Inch x 18 Inch to 10 Inch Round Duct Transition

FF/FFC - Ceiling & Inline/Cabinet Fans Collection Duct Transition for Models FF and FFC 400, 500 and 700 As part of the extremely quiet commercial and industrial FF and FFC ventilators that are ideal for high capacity ventilation needs, the addition of the 423 duct transition helps easily connect the unit to ceiling and in-line mounted ducting systems. Duct Transition: Create a more versatile ducting layout with the transition piece that connects your Soler and Palau FF and FFC ventilation units to a var...