No more hot air in - Window seals keep hot air from portable air conditioning hoses away by locking the hose between the window frame and the window. Our window seals create a "closed environment" that keeps your room cooler for longer. Improve cooling performance - Seal your open doors, then pull tight along the hose nozzles to stop warm air from flowing back in, so your portable air conditioning unit can be more efficient and cool your room in less time. Reduce energy consumption - love the planet This door seal helps reduce energy consumption and CO2 emissions, which are particularly high in the summer due to heavy use of air conditioning. The door seal prevents the circulation of hot air in the room, helping you save on your electricity bill Easy to install - no drilling required. Simply apply the hook tape to the inside of the door frame and to the door itself. Attach the door seal to the hook-and-loop tape. Then, open the zipper on the door seal and place the A/C hose on the outside of the door. Finally, close the zipper around the hose tightly. Although very simple. Universal and easy to use - works with all portable air conditioners and tumble dryers, regardless of manufacturer. The door seal works whether the door opens to the left or to the right. Fits doors with a maximum circumference of 36x83" (90x 210CM) (Package includes sealing cloth only)