The crossword solutions for the term DUCT OUTPUT are TEAR. DUCT OUTPUT is a term used in the construction industry to refer to the air that is expelled from a building through a duct system. The air is usually expelled through vents or grilles, and the output of the duct system is measured in cubic feet per minute. TEAR is an acronym for Total Exhaust Air Rate, which is the rate at which air is expelled from the building.