VENT HOT AIR OUT OF YOUR ROOM: Door seal for mobile air conditioner vent hot air out of your room from the hose of your mobile AC unit by locking the hose through a Balcony Door. Waterproof door sealing cloth worries you free of insects and mosquitoes, creating a cooler room in hot summer.ENHANCE COOLING PERFORMANCE: Portable A/C door kit seals around your door and then zip around your hose which directs your ventilation outside. Thanks to this great idea, your room can be cooled in less time and the air conditioning creates an excellent cooling performance for you.ENERGY SAVING & MONEY SAVING CHOICE: Air conditioner hose seal helps to reduce energy consumption and to lower emission of carbon dioxide. A well-constructed exhaust ventilation system saves your electric bills under efficient cooling enjoyment with our airlock door seal cloth.QUICK & EASY INSTALLATION: No need for drilling holes. All just involves sticking the cloth inside the door frame. Then pinch air hose in the window seal by using zipper and lock the hose with cable tie to direct airflow outside.UNIVERSAL AND CONVENIENT TO USE: AC exhaust hose sealing cloth is suitable for all portable air conditioners and tumble dryers with single or double exhaust hose tube. Door seal air stop fits doors with a maximum perimeter of 90x 210CM.