DOT 35 IBConstructive Details Air Shutter It enables air to be expelled while preventing polluted air and dust from entering, reducing heat loss and cold air infiltration through exhaust ducts Reducer 150 120 Joins 150 mm and 120 mm ducts with a secure seal, preventing leaks and ensuring efficient, flexible system design. Fixing Bracket Allows for the support, fixation, and alignment of the unit to a wall or other surfaces. Control Functions Speed Adjustment