Insulated flexible air duct yog tsim los rau cov cua tshiab lossis HVAC system, siv rau ntawm chav tsev kawg. Nrog iav ntaub plaub rwb thaiv tsev, cov kav dej tuaj yeem tuav cov cua kub hauv nws; qhov no txhim kho kev ua haujlwm ntawm cov cua txias system; nws txuag hluav taws xob thiab nqi rau HVAC. Dab tsi ntxiv, iav wool rwb thaiv tsev txheej tuaj yeem muffle lub suab nrov airflow. Kev siv cov kab hluav taws xob hloov tau yooj yim hauv HVAC system yog qhov kev xaiv zoo.