Year-round energy savings: Adjustable side frames enable millimetre-precise gap adjustment, effectively blocking air leaks for continuous energy savings, improved living comfort, and reduced heating costs. Easy installation: Pre-assembled side coverings allow tool-free installation in minutes – a precise window fit without extra tools, saving time and simplifying the mounting process. Air quality and noise reduction: Acts as a barrier against allergens and dust particles, delivering wind and noise reduction through robust insulation material with reliable sealing. Seasonal temperature control: Improves system performance by keeping warmth in the room during winter and blocking outside air in summer, enabling intelligent energy use with no extra effort. Typical uses: - Retrofit of drafty living rooms or apartments to reduce energy bills and improve comfort - New-builds or renovations requiring quick, tool-free installation and precise fit - Homes near busy streets or dusty environments where air quality and noise reduction are beneficial