GLR-54 SL Insulated Inward-Opening Window System
GLR-54 SL is a thermally insulated, inward-opening aluminium window system with a concealed sash, designed to meet the aesthetic and performance expectations of modern architecture.
- Concealed sash and slim profile geometry
- 15/16″ thermal barrier with Uw 1.10 W/m²K performance
- 264–441 lbs maximum sash weight capacity
Concealed Sash, Refined Performance
A clean architectural expression supported by thermal insulation and reliable hardware solutions.
Concealed Sash Design
The concealed sash and slim profile geometry create a clean, minimalist and seamless facade appearance.
Thermal Insulation
The 15/16″ thermal barrier supports indoor comfort and energy performance with a Uw value of 1.10 W/m²K.
Inward-Opening System
The inward-opening window configuration combines functional operation with a visually restrained exterior profile.
Reliable Hardware Solutions
Adjustable locking hardware improves air and water resistance while supporting enhanced acoustic insulation.
GLR-54 SL Technical Details
TECHNICAL SPECIFICATIONS
- Sash Width3 3/8″
- Frame-to-Sash Height2 3/16″
- Frame Width3 3/8″
- Glazing Thickness1″–1 1/8″
- Thermal Barrier15/16″
- Maximum Sash Weight264–441 lbs
- Thermal TransmittanceUw 1.10 W/m²K
The concealed sash, adjustable locking hardware and carefully engineered profile geometry combine a uniform facade appearance with improved weather and acoustic performance.
Maximum view with a concealed sash.
Minimized sash profile visibility creates a clean, uniform and visually seamless facade appearance, while the insulated inward-opening system supports comfort and dependable operation.
Let us define the right GLR-54 SL solution for your project.
Contact our specialist team for sash dimensions, glazing selection, inward-opening configurations, insect screens and application options.