All-year energy savings: Adjustable side frames enable millimeter-precise gap control, effectively blocking air leaks for continuous energy savings, improved living comfort, and reduced heating costs. Flexible positioning: With pre-mounted side cladding, achieve a perfect window fit in minutes — completely tool-free for maximum flexibility and easy installation on any window type. Dust barrier: Blocks pollen and fine dust effectively, reduces wind noise, and improves indoor air quality through high-quality insulation material. Seasonal temperature control: Enhances system performance with features that keep warmth in the room during winter and block outside heat in summer, for intelligent energy use with no extra effort. Key specifications and compatibility - Compatibility: Fits a wide range of window types thanks to adjustable side frames and pre-mounted side coverings; works with any window type. - Materials: High-quality insulation material and durable side panels. - Size and fit: Millimeter-precise gap adjustment; adjustable width to suit common window sizes. - Performance: All-year energy savings, improved comfort, and reduced heating costs. - Installation: Tool-free installation with pre-mounted components for quick and flexible setup. Use scenarios - Residential retrofit: Ideal for drafty living rooms or bedrooms where improving comfort and lowering heating bills matters. - Office or commercial spaces: Suitable for buildings with large or multiple windows to reduce HVAC load and maintain a stable interior climate. - Seasonal properties and varying climates: Effective in regions with cold winters and hot summers, enabling energy-efficient operation with minimal effort.