GLR-33 Insulated Sliding System
GLR-33, the insulated sliding system of the Grande Series, combines superior insulation and energy efficiency with a 250 kg sash capacity, glazing up to 60 mm and smooth sliding performance.
GLR-33 was developed for villas, residences and commercial projects that expect expansive glass and high insulation. Its 113 mm sash and 60 mm frame form a strong body, and the 21 mm thermal break with a 24–60 mm glazing range allows triple-glazed, acoustic and solar-control combinations. The standard system carries 250 kg per sash; anodised, powder-coated and wood-effect finishes match the architecture. The GLR-33 Plus version adds further insulation details for higher performance.
Key features
01 · Superior thermal insulation
A 21 mm thermal break and a 24–60 mm glazing range; with triple glazing, indoor comfort that reaches the highest energy classes.
02 · Smooth mechanical performance
Despite the 250 kg load capacity the system slides quietly, in control and without effort.
03 · High corrosion resistance
Durable profiles and finish options deliver long-lasting performance in coastal and heavily used projects.
04 · Architectural finish options
Anodised, powder-coated and wood-effect alternatives; with dual-colour application the inner and outer faces can differ.
Technical details
| Specification | Value |
| Sash Height | 113 mm |
| Frame Height | 60 mm |
| Sash Width | 73 mm |
| Mullion Width | 121 mm |
| Maximum Glass Thickness | 24–60 mm |
| Thermal Break | 21 mm |
| Standard Load Capacity | 250 kg |
The system can be adapted to different project requirements with fixed and movable sash, insect screen and 90° sash joint options.
Product visuals
Frequently asked questions
What is the difference between GLR-33 and GLR-33 Plus?
GLR-33 Plus adds extra insulation and sealing details to the same profile system for higher thermal and acoustic performance; dimensions and frame structure are identical.
When should GLR-33 be chosen over LR-3500?
GLR-33 is preferred in projects with glass thicker than 44 mm (triple glazing), sashes up to 250 kg, or where the Grande Series profile language is required.
Plan your project with Ferrini
Ferrini is the authorised manufacturer of LineaRossa aluminium systems. The GLR-33 is machined and glazed in our İzmir facilities and supplied as a knock-down system to our authorised dealers across Türkiye; measuring, glass, colour and hardware selection and installation are handled by your nearest Ferrini dealer.
Contact us for your nearest dealer and a quote
Technical files are in the dealer portal
Technical catalogues, DWG drawings, installation files and current price lists are in the Ferrini dealer portal. Not a dealer yet? Apply and we will open access.