The Size 3 E Mag Door Closer is a standard, essential fire safety device for modern buildings. It allows fire doors to remain open during regular use for easy access but ensures they close automatically in the event of a fire. Size 3 is specifically designed for doors weighing up to 60kg and having a maximum width of 950mm, making it the ideal choice for most internal timber fire doors.

Why Choose a Size 3 E-Mag Closer?

In commercial spaces like offices, hotels, and schools, heavy fire doors are necessary for safety but can be a physical barrier for people with disabilities, the elderly, or young children. A Size 3 E Mag Door Closer addresses this by providing two main operating modes:

Hold-Open Mode: The door is held open at a specific angle (usually between 85° and 110°), allowing for barrier-free passage in high-traffic corridors.
Swing-Free Mode: The door operates as if no closer is attached, allowing it to be left in any position. This is the preferred choice for care home bedroom doors, as it offers privacy without compromising fire safety.

When the building’s 24V DC fire alarm system is triggered, or if power is cut, the electromagnet releases, and the internal spring closes the door securely.

Top Size 3 E-Mag Door Closers

For a reliable fire safety installation, consider these top-rated options:

The Briton 996 Series is a benchmark for durability. This Size 3 E Mag Door Closer is EN 1155 certified and features site-selectable hold-open or swing-free modes. It is ideal for public buildings like hospitals and schools due to its rugged die-cast aluminum body and heat-treated steel mechanism.

For a more versatile and high-performance option, the Geze TS 4000 E offers an adjustable power range from Size 1 to 6. It can be perfectly calibrated to a Size 3 setting for smaller internal doors. This model includes a visual power size indicator and is Certifire Approved for fire doors up to 120 minutes.

Technical Specifications

Feature	Detailed Specification
Power Rating	EN Size 3 (Ideal for standard internal fire doors)
Max Door Weight	60kg
Max Door Width	950mm
Operating Voltage	24V DC (Connects to Fire Alarm)
Certifications	BS EN 1155, BS EN 1154, CE Marked, Certifire Approved
Safety Features	Adjustable closing and latching speeds

Installation & Maintenance Tips

Select the Right Finish: These Size 3 E Mag Door Closer are available in various architectural finishes, such as Satin Stainless Steel, Silver, and Polished Brass, to complement your existing door hardware.
Regular Testing: Since these are fire-safety devices, it is vital to test the electromagnetic release weekly as part of your standard fire alarm maintenance.
Correct Mounting: Depending on your door’s opening direction, you may need a model for pull side (Fig 1) or push side (Fig 66) mounting. Ensure you choose the correct configuration for your doorway.
Avoid Obstructions: Ensure no floor wedges or heavy furniture are placed where they could prevent the door from closing once the magnet releases.

The Size 3 E Mag Door Closer with radius design provides reliable and smooth closing for a variety of doors. Engineered for consistent operation, it ensures doors close gently and securely every time, helping to protect frames, hinges, and handles. Its compact design with a radius finish adds a clean and professional look while offering durability for everyday use in homes, offices, or commercial spaces.

Easy to install and maintain, this Size 3 E Mag Door Closer works efficiently with a range of door sizes and weights, providing both convenience and safety. The robust construction guarantees long-lasting performance, reducing wear and tear over time. Ideal for new installations or upgrading existing doors, the Size 3 E Mag Door Closer combines reliability, smooth operation, and a neat, functional design.