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

Product Overview

The dormakaba GROOM GR-3500, version B, is a slide channel door closer suitable for commercial and public building entrances where reliable and adjustable closing is required. Designed for mounting on the hinge side (door leaf) or opposite the hinges (frame), it offers smooth force adjustment within EN 3-5, and is approved for installation on fire and smoke protection doors. Maximum supported door width is 1250 mm, and the opening angle reaches up to 180° on the hinge side.

A key differentiator of this model is its asymmetrical toothed gear mechanism, which significantly reduces the effort needed to open the door compared to standard closers. This feature minimizes accessibility issues in high-traffic or barrier-free environments and simplifies compliance with project requirements for reduced opening force. Recommended for B2B buyers managing commercial fit-outs, fire-rated partitions, or public sector procurement where accessibility and regulated closing force are critical.

Key Features

• Adjustable closing force EN 3-5 ? suitable for doors up to 1250 mm wide


• Fire and smoke door approval ? compliant use with certified protection doors


• Maximum 180° opening angle ? supports wide access requirements


• Asymmetrical gear design ? lower manual opening resistance for barrier-free access


• Thermo-valve technology ? stable operation in varying seasonal temperatures


• Front-access adjustable valves ? simplifies on-site installation and fine-tuning


• Wind resistance function ? opening damping prevents damage during sudden gusts

Technical Specifications

• Closing Force: EN 3-5 (adjustable)


• Maximum Door Width: 1250 mm


• Opening Angle: up to 180° (hinge side)


• Fire Door Approval: Yes


• Smoke Protection Door Approval: Yes


• Closing Speed Adjustment: 180°-7°


• Final Latching Adjustment: 7°-0°


• Opening Damping Adjustment: 70°-180°


• Mounting Options: Hinge side (door leaf) or opposite (frame)


• Color: Black

Applications

Deployed in offices, public buildings, educational institutions, and compliant fire zones. Used for single-leaf fire and smoke control doors, internal corridor doors, and locations requiring regulated closing and ease of manual use. Suitable for accessibility-focused projects and environments experiencing variable temperatures or wind exposure.

Packaging & Shipping

Standard export packaging. Unit includes door closer body, slide channel, and installation accessories.