Air conditioner hose cover for 12.7–15 cm hoses that improves performance, reduces energy loss, and stays securely in place. Key benefits Tool-free, fast installation: Installs in minutes without tools so your portable AC is ready to use quickly. Energy-saving three-layer insulation: Reduces heat transfer and limits warm air entry around the exhaust hose, helping the unit run more efficiently and maintain a cooler room temperature. Increases cooling effectiveness: Tailored fit for 12.7–15 cm hoses integrates easily with existing portable AC systems and reduces performance losses caused by uninsulated hose connections. Secure, adjustable fit: Built-in adjustable mechanism prevents hose offset and ensures reliable stability through optimal tension during operation. How it solves common problems Prevents heat gain and energy waste at the hose connection point. Stops hose sliding and disconnection that can interrupt cooling or create drafts. Simple installation avoids the need for tools or complicated modifications. Compatibility and performance Designed specifically for hoses with diameters of 12.7–15 cm. Three-layer insulated construction for improved thermal performance and everyday comfort. Integrates with standard portable air conditioner exhaust setups without altering the unit. Practical use scenarios Portable air conditioners in apartments or rental properties where quick, non-invasive installation is required. Bedrooms, home offices, or living rooms where minimizing energy use and maintaining steady cooling matters. Temporary cooling setups during events, renovations, or seasonal use where secure hose attachment and reduced heat ingress are needed. Reliable, straightforward solution to reduce heat loss, improve AC efficiency, and keep exhaust hoses stable during operation.