NO MORE HOT AIR INCOMES window seal keeps the warm air coming from the hose of your portable air conditioner away by locking the hose between the window frame and the window itself. Our window seal keeps out insects, mosquitoes, and rain while creating a sealed environment that helps maintain a cooler room for longer. INCREASE COOLING PERFORMANCE. Achieve a cooler environment in summer with an effective seal around your open window. The design zips securely around the nozzle of your hose, blocking the entry of warm air and allowing your portable air conditioner to operate more efficiently, cooling your room faster. REDUCE ENERGY CONSUMPTION. This window seal helps reduce energy usage and lower carbon dioxide emissions associated with air conditioning use during hot months. By preventing warm air from entering your room, it contributes to lower electricity bills over time. EASY TO INSTALL – NO DRILLING REQUIRED. No need to purchase additional window kits, hose adapters, or tools. Everything you need is included. Apply the adhesive hook tape to the inside of your window frame and the window surface. Attach the window seal to the tape. Open the zip, route the air conditioner hose through the window, then close the zip tightly around the hose. Simple and secure. UNIVERSAL FIT – Compatible with all portable air conditioners and vented tumble dryers, regardless of brand. Works with left-opening, right-opening, bottom-hung windows, and skylights. Fits windows with a maximum perimeter of 300 cm.