Exhaust Hot Air From Your Room: The Window Seal Seal exhausts hot air from your room through the pipe of your mobile AC unit by sealing the pipe between the window frame and the window sash. Our waterproof window sealing fabric protects you from insects and mosquitoes, creating a cooler room in hot summer weather. Improve Cooling Performance: The Portable A/C Window Kit seals around your window and zips around the hose that carries ventilation to the outside. Thanks to this brilliant idea, your room can be cooled in less time and the air conditioning unit creates an excellent cooling performance for your comfort. Energy Saving Choices and money: Air conditioner pipe airtight seal contributes to the reduction of energy consumption and carbon dioxide emissions. A well-designed exhaust ventilation system saves your electricity bills while enjoying efficient cooling with our window seal. Quick and Easy Installation: No need to drill holes. Simply stick the sealing fabric inside the window frame and the window itself. Then pinch the air hose in the window seal with a zipper and seal the hose with a cable tie to vent the airflow to the outside.< /p> Universal Adjustment: The 157 inch AC Exhaust Pipe Sealing and Sealing Cloth is suitable for all portable air conditioners and dryers. It is also compatible with most windows with a maximum perimeter of 300 cm. It doesn't matter if it's crank or casement windows, you can install your exhaust bracket in a very easy way.