Ducting ventilation details 2d cad blocks in AutoCAD, dwg file.

<p>This Architectural Drawing is AutoCAD 2d drawing of Ducting ventilation details 2d cad blocks in AutoCAD, dwg file. <strong>Ducts are conduits or passages used in heating, ventilation, and air conditioning (HVAC) to deliver and remove air</strong>. The needed airflows include, for example, supply air, return air, and exhaust air. Ducts commonly also deliver ventilation air as part of the supply air.</p>