Air Conditioner Window Seal Key benefits Reduce energy use and lower cooling costs: creates an airtight barrier around the AC hose to stop hot outside air from entering and cooled air from escaping. Improves comfort and prevents drafts: reliable windproof protection keeps room temperature stable. Durable, weather-resistant protection: made from high-quality waterproof polyester for long-lasting use. Tool-free installation and removal: zip-open design fits around the hose and seals in place without drilling or hardware. Year-round convenience: can remain installed when temperatures drop; simply open or close the window as needed and reinstall easily next season. How it works Place the AC exhaust hose through the window frame, open the zip panel, position the fabric around the hose, and tighten the seal for an airtight fit. The material and construction block backflow and external drafts without modifying the window or AC unit. Key attributes Function: blocks hot air backflow, windproofs the window opening, improves energy efficiency. Compatibility: designed for window-mounted AC installations that use an exterior exhaust hose and require a sealed frame opening. Material: waterproof polyester for durability and weather resistance. Performance: provides a tight seal around the hose to minimize air exchange and reduce strain on the air conditioner. Installation: no drilling or tools required; zip closure for quick fit and removal. Practical applications Bedroom: keep nighttime temperatures steady and reduce AC runtime for quieter, more efficient cooling. Home office or living room: prevent drafts and avoid hot air infiltration around the hose while you work or relax. Seasonal use in rentals or apartments: protect from wind and rain without altering the window—leave installed through cooler months or remove for storage. What to expect A simple, reusable solution that improves AC efficiency and comfort with minimal effort. Follow the zip-and-tighten steps for an airtight fit; remove or adjust as needed without tools or permanent changes to the window.