Hon&Guan 4 Inch Insulated Flexible Duct - 4 FT Noise Reducer Heavy-Duty Four Layer Protection Hose, Insulated Duct for Exhaust Fan Insulation, Heating & Cooling Ventilation, Black

Noise Reducer&Absorption：The internal structure of glass wool is fluffy and the overall density is large, noise can be reduced by allowing some of the sound waves to escape through the holes rather than reflecting, can decrease the noise by up to 50%,Thermal Insulation：This Flex Duct is intended to be used in heat preservation, cooling, ventilation, with a good thermal insulation performance, works well with your portable ac device, temperature endurance range from -22°F ~ 302 °F (-30℃ ~ 150℃),Four Layer Protection：Heavy-duty four layer protection design, 1 * PVC+2 * aluminum foil+1 * centrally glass wool with 2 clamps, and the outermost layer of this insulated flexible duct can prevents cute “pets” from biting and breaking,Anti-Corrosion & Durable：Thick layer of PVC&2 layers of Aluminum on this flexible ducting prevents gas leaks effectively. Works with extractor and exhaust inline duct fans, carbon filters, also be used as a boat blower hose,Variety of Applications：Hon&Guan insulated flexible duct is suitable for HVAC system. It will move and deliver air in Kitchens (cooking exhaust), Green Houses and Grow Rooms (Air Circulation, Intake, Exhaust and Light Fixture Cooling), Bathrooms (Smell and Moisture Exhaust), Dryer Rooms, Grow Tents and other applications etc