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WebJun 17, 2024 · There are three types of duct systems. Namely, flexible ductwork, rigid ductwork, and semi-rigid ductwork. We've compiled information on each of these duct systems. 1. Flexible Ductwork. These … WebHVAC systems are used in both commercial and residential buildings — from offices to factories, hotels to homes. They’re a big factor when it comes to the overall comfort of … WebChemical-Resistant Duct and Fittings Made of PVC plastic to withstand acids, alkalies, salts, and other corrosive vapors and fumes. Sure-Seal Spiral Duct and Fittings Fittings have gaskets which create a tight seal— you don't need to seal joints with coating or tape. Rectangular Duct and Fittings four corners second edition respuestas