HONGUAN(Hon&Guan) Window Seal 400 cm for Mobile Air Conditioners, Double Zip, Heat Insulating, Waterproof, Abrasion-Resistant, Suitable for Window Seal, Air Conditioning, Roof Windows, Casement Windows backdraft-damper 4 Inch Ducting Lightproof: Thick

4 Inch Ducting Lightproof: Thick layer of black PVC on flex duct prevents light leaks

lightweight PVC hose offers a smooth interior for easy airflow with basic insulation and light‑blocking properties

The dryer duct is built with 2 layers of aluminum foil with a layer of PET and steel wire helix to preserve the shape

Installation and Maintenance

Its high-efficiency motor ensures optimal airflow while minimizing energy consumption

HONGUAN(Hon&Guan) Window Seal 400 cm for Mobile Air Conditioners, Double Zip, Heat Insulating, Waterproof, Abrasion-Resistant, Suitable for Window Seal, Air Conditioning, Roof Windows, Casement Windows backdraft-damper 4 Inch Ducting Lightproof: Thick