Casement window Grants

TOSTEM’s GRANTS casement window features a sturdy aluminum frame combined with large glass panels, expanding views and maximizing natural light. Its flexible casement design creates an open, modern feel and allows for easy light adjustment, optimizing the living experience. Every detail—from the frame and hinges to the glass—is meticulously crafted for smooth, durable, and reliable long-term operation.

Sturdy and Refined Frame

With a 120 mm frame depth for 2-track systems and 178 mm for 3-track systems, paired with a 50 mm sill height, the window balances structural strength and sleek elegance. Precision engineering enhances load resistance while adding a luxurious highlight to the overall building.

Versatile Glass Compatibility

The GRANTS casement window accommodates glass thicknesses up to 31.5 mm, supporting everything from safety glass to acoustic or thermal insulation glass. This flexibility satisfies diverse user needs while enhancing sound reduction and thermal efficiency.

Wind Pressure and Water Tightness

The window achieves a wind pressure resistance of 2000 Pa (ASTM E330) and a water tightness performance of 300 Pa (ASTM E331-00), protecting interior spaces against driving rain and severe winds while maintaining a dry, comfortable indoor environment.

Airtightness and Effective Sound Insulation

Meeting the airtightness standard of 10.7 m³/h·m² (ASTM E283) and a sound insulation rating of JIS 25 dB, the GRANTS casement window blocks dust, air pollutants, and outdoor noise to create a quiet, relaxing space for the family.

An Ideal Choice for Modern Architecture

Combining sophisticated design, high durability, and stable operation, the GRANTS casement window elevates architectural style and value while optimizing light and views—making it perfect for villas, townhouses, or high-rise apartments.