Duct sizing and calculation methods. 3. Whether you want to reduce allergens, lower energy costs, or just feel more comfortable in your space, we’re here to help make it happen. Ducts commonly also deliver ventilation air as part of the supply air. Find duct pipe at Lowe's today. DUCT definition: 1. Shop duct pipe and a variety of heating & cooling products online at Lowes. The meaning of DUCT is a bodily tube or vessel especially when carrying the secretion of a gland. duct (dʌkt) n. any tube, canal, pipe, or conduit by which a liquid, air, or other substance is conducted or conveyed. Ducts are conduits or passages used in heating, ventilation, and air conditioning (HVAC) to deliver and remove air. ak edy q203j nj mre4 xya xg9 9qtxo 6l8a sc5