dormakaba GROOM GR-3500 Door Closer EN 3-5 Slide Channel White Asymmetrical Gear

Product Overview

The dormakaba GROOM GR-3500 version B is a surface-mounted door closer with slide channel, intended for installation either on the hinge side of the door leaf or on the opposite side on the frame. It provides adjustable closing force within the EN 3-5 range, supporting doors up to 1250 mm wide and allows opening to 180° when mounted on the hinge side. Certified for use on fire-rated and smoke-control doors, it is suitable for commercial, institutional, and residential applications where certified hardware is required.

Its asymmetrical gear mechanism distinguishes the GR-3500 from typical EN 3-5 closers, significantly reducing the effort required to open heavy doors. This eliminates user accessibility concerns and enhances performance in high-traffic projects where ease of entry is critical. Particularly recommended for bulk procurement in office buildings, hospitals, and schools requiring compliance with fire and smoke protection standards.

Key Features

• Adjustable closing force EN 3-5 ? covers door leafs up to 1250 mm for mid-weight openings


• Asymmetrical gear ? reduces opening effort, improving accessibility for all users


• Thermo-valve technology ? ensures stable operation and adjustment throughout seasonal temperature shifts


• Quick valve access ? regulatory valves are front-facing for fast, tool-free adjustments


• Opening angle up to 180° ? maximizes access flexibility on the hinge side


• Slide channel design ? installation hardware remains concealed for improved visual aesthetics


• Wind damping function ? opening control from 70°-180° prevents door damage from sudden gusts

Technical Specifications

• Closing Force: EN 3-5 (continuously adjustable)


• Maximum Door Width: 1250 mm


• Maximum Opening Angle: 180° (hinge side)


• Fire Door Approval: Yes, suitable for fire- & smoke-control doors


• Closing Speed Adjustment: 180°-7°


• Final Latching Adjustment: 7°-0°


• Wind Damping Adjustment: 70°-180°


• Mounting Options: Hinge side on leaf or opposite side on frame


• Valve Access: Front


• Color: White

Applications

Commonly used in commercial and institutional buildings including offices, hospitals, schools, and residential complexes. Compatible with fire-rated and smoke-control doors, meeting safety compliance requirements. Supports bulk installations where ease of access and regulatory certification are priorities.

Packaging & Shipping

Standard export packaging. Each unit includes the door closer body, slide channel, mounting hardware set, and installation manual.