Corner Fixed Window - GRANTS by TOSTEM The GRANTS series from TOSTEM offers an unparalleled experience with its innovative design, providing a larger glass surface for panoramic views. It’s the perfect blend of functionality and elegance, engineered to enhance both your living space and view. Key Features: Air Tightness: ASTM E283: 10.7m³/h·m², ensuring optimal insulation. Noise Insulation: Reduces noise pollution by 25 dB (JIS Standard) for a quieter living environment. Water Tightness: Withstands up to 300 Pa (ASTM E330), protecting your space from water ingress. Wind Pressure Resistance: Built to resist wind pressures up to 2000 Pa (ASTM E330), ideal for high-wind areas. Performance varies based on room conditions. For optimal results, consult with an insulation specialist.