- Enhanced Cooling Efficiency: Upgrade your portable air conditioner’s effectiveness with this specialized window seal. The 200/300CM seal prevents warm air from re-entering your space, allowing your AC unit to cool rooms more quickly while lowering energy costs and maintaining a comfortable environment. - Simple Installation: Easily install this flexible polyester seal around your window frame using the adjustable tension rope. Connect your portable AC or dryer exhaust hose through the designated opening. The waterproof design ensures a secure fit without the need for tools or permanent window modifications. - Versatile Compatibility: Designed for a range of window types including tilting windows, casement windows (left or right opening), bottom hung windows, and skylights. This seal is effective for top-hung skylights and inward-opening casement windows, providing flexibility for various window configurations in your home. - Multi-Appliance Use: Ideal for portable air conditioners, tumble dryers, exhaust dryers, and dehumidifiers. The adjustable opening accommodates standard exhaust hoses, making it a practical choice for multiple household appliances that require external ventilation while keeping your indoor climate controlled. - Practical Applications: - Use it during hot summer months to enhance your air conditioner's cooling power. - Install it with your dehumidifier to efficiently expel moisture without letting warm air back in. - Pair it with a dryer to vent hot air outside, ensuring your laundry area stays cool and comfortable.