MORE HOT AIR REVENUEWindow seal prevents hot air from your portable air conditioner hose from blowing away by locking the hose between the window frame and the window housing. Our window seal keeps out insects, mosquitoes, rain, and creates a "closed environment" that keeps your room cooler for longer. INCREASE COOLING PERFORMANCEEnjoy a cooler environment in the summer thanks toseals around your open window, then zips around your hose nozzle and blocks the return flow of hot air so your mobile air conditioning unit can be more efficient and cools your room in less time time. REDUCE ENERGY CONSUMPTIONLove the Earth This window seal helps to reduce energy consumption and reduce carbon dioxide emissions, which is particularly high in summer due to the heavy use of air conditioning. Preventing hot air from circulating in your room, the window seal helps you save money on electricity bills EASY TO INSTALLNO NEED TO DRILL HOLES. you need comes with your window seal Simply apply the hook tape to your window frame and window casing. Tape the window seal. Then unzip