Mixed Window GRANTS

TOSTEM’s GRANTS Combination Window pairs a sturdy aluminum frame with expansive glass panels, maximizing natural light and offering broad views. Its flexible design—compatible with various sash options and tracks—ensures smooth, seamless operation while creating an open, modern, and luxurious indoor atmosphere. Every detail, from the frame and tracks to the glass, is meticulously crafted for long-lasting durability and stability.

Sturdy and Refined Frame

Featuring a 101.6 mm frame depth and a sill height of 120 mm for the 2-track system (178 mm for the 3-track system), the window strikes a perfect balance between structural strength and sleek elegance. Precision-engineered profiles enhance load-bearing capacity while elevating the building’s modern, high-end look.

Versatile Glass Compatibility

The GRANTS Combination Window accommodates glass thicknesses up to 31.5 mm, supporting laminated safety glass, acoustic glass, or thermal insulation glass. This versatility meets diverse user requirements while significantly boosting sound reduction and thermal efficiency.

Wind Pressure and Water Tightness

Compliant with ASTM E330 standards, the window withstands wind pressures up to 2000 Pa and achieves a water tightness rating of 300 Pa (ASTM E331-00). This protects interior spaces from wind-driven rain and severe storms, keeping the living environment dry and comfortable.

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 window effectively blocks dust, pollutants, and external noise to deliver a quiet, relaxing indoor setting.

An Ideal Choice for Modern Architecture

Combining sophisticated design, exceptional durability, and reliable performance, the GRANTS Combination Window is perfect for villas, townhouses, and modern high-rise apartments—elevating architectural value while optimizing daylight and views for your home.