In modern commercial construction, the Size 4 Square E Mag Door Closer is the go-to choice for high-traffic corridors. It functions as a “fail-safe” device: during normal hours, it holds the door open for easy access and ventilation, but it is wired directly to the building’s fire alarm. The moment the alarm sounds or power is cut, the magnet releases, and the closer shuts the door to prevent the spread of smoke and fire.

The Size 4 Square E Mag Door Closer provides a clean, minimalist aesthetic that aligns with “square-line” door handles and hinges, making it a favorite for modern office blocks, luxury apartments, and high-end retail spaces.

Why the Size 4 Square E-Mag is the Professional Choice

Regulated Power: Size 4 provides the necessary torque to ensure heavy fire doors (up to 1100mm wide) latch securely against intumescent seals.
Dual Functionality: Can be configured for Hold-Open (stays open at a set angle) or Swing-Free (door moves effortlessly as if no closer is attached) modes.
Aesthetic Integration: The square-profile casing conceals the hydraulic mechanism and wiring for a professional, “built-in” appearance.
EN 1155 Certified: Fully compliant with European standards for electrically powered hold-open devices on fire-resisting doors.
Durability: Built for millions of cycles, making it suitable for high-frequency use in hospitals and schools.

Technical Specifications of Size 4 Square E Mag Door Closer

Feature	Specification
Power Rating	EN Size 4 (Fixed or Adjustable)
Input Voltage	24V DC (Standard Fire Alarm Interface)
Cover Style	Square / Linear (Satin Stainless or Silver)
Max Door Weight	80kg
Compliance	BS EN 1155 & CE Marked
Material	High-Grade Aluminum Body with Steel Arm

Top Size 4 Square E-Mag Recommendations

The Briton 996 Series is widely regarded as the “gold standard” for commercial fire safety. It features a robust square-cover design and is famous for its long-term reliability in UK hospitals and schools. It can be mounted on the “pull” side of the door for a clean look.

For premium office environments where precision is key, the Size 4 Square E Mag Closer offers an integrated electromagnetic hold-open unit with a sleek, square aesthetic. Its hydraulic system is exceptionally smooth, ensuring the door closes quietly but firmly every time.

Installation & Maintenance Pro-Tip

When installing a square Size 4 Square E Mag Door Closer, ensure the 24V DC power supply is constant. If the door keeps “dropping” or releasing unexpectedly, check for a voltage drop in the fire alarm circuit or ensure the magnet contact plates are free from dust and debris.

The Size 4 Square E Mag Door Closer with radius design is built to provide smooth, reliable door closing for a variety of internal and external doors. Its precision engineering ensures consistent operation, helping doors close gently and securely every time. The radius design adds a clean, modern look while providing durability and strength for daily use in busy environments such as offices, schools, or commercial buildings.

Easy to install and maintain, this Size 4 Square E Mag Door Closer is suitable for a wide range of door sizes and weights, giving both security and convenience. Its robust construction ensures long-lasting performance, reducing wear on door frames and hinges while maintaining smooth operation. Ideal for upgrading existing doors or completing new installations, this Size 4 Square E Mag Door Closer offers reliability, safety, and professional functionality in one compact, efficient unit.