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When you're undertaking a remodeling or building project, ductwork installation is one of those things you may not think about until you need it. Actually a Duct is a tube or passageway in a building or machine for air, liquid, cables, etc.Ducts are used in heating, ventilation, and air conditioning to deliver and remove air. 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.In these post you can Download spreadsheet xls for calculating and estimating duct cost. The excel sheet estimates duct cost according to total area and equivalent length besides duct accessories. It calculate cost of HVAC duct such as rectangular, round and flexible ducts.
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