NO MORE INTRUSIVE HOT AIR - The window seal traps the hot air released from your portable air conditioner's duct by blocking it between the window frame and the window itself. Our window seal keeps out unwanted guests and rain and creates a "closed environment" that helps keep the room cooler for longer. INCREASE COOLING PERFORMANCE - Enjoy cooler air in the summer thanks to! Our product seals around the window even when it's open. It surrounds the vent of your air conditioner and blocks the return of hot air, allowing your portable air conditioner to be more efficient and cool the room faster. REDUCES ENERGY CONSUMPTION - Love the Earth! This window seal helps reduce energy consumption and carbon dioxide emissions, which is especially important in the summer due to the intensive use of air conditioners. By preventing hot air from circulating in the room, the window seal allows you to save on your electricity bill! EASY INSTALLATION - NO DRILLING REQUIRED. Everything you need is