When sheet steel and fiberboard ducts are rigid forms of ductwork, flex ducts are tube-formed, insulated, and bendable. They’re ideal for oddly shaped or tricky spaces and can be hooked up to rigid ductwork linked to an air offer. DIY ductwork substitution is unlawful in many states without a license. https://milolcqes.ageeksblog.com/27943561/examine-this-report-on-ductwork-installers