The \"HVAC Insulated-Flex\" hose is a superb choice for HVAC air duct use. These flexible ducts for air conditioning applications are double-ply insulated flexible hoses that are made of aluminum foil and PET film layers. Each HVAC flexible duct is insulated with glass wool material. It is a competitive and cost-effective HVAC ducting option. The shiny silver insulation material makes this product look good in any setting. The insulated nature of this portable air conditioner hose allows it to operate in both high and low temperatures. The double-ply insulated material of this HVAC flex ductwork allows it to function well in temperature ranges between -20° F and 160° F. Whether your application involves the transfer of cold air or hot air， this HVAC duct will easily maintain its structural integrity. This portable air conditioner hose that can be easily compressed for transportation purposes which is very useful if your applications are constantly on the move. Our \"HVAC Insulated-Flex\" comes in the following internal diameter (ID) options: 4\

Compressible and easy to transport

An extremely cost effective insulated duct

Provides acoustical as well as thermal insulation

Insulation maintains temperature of air inside hose

Ideal for use for permanent and mobile air condition units