Electro Magnetic Hold Open Devices

Electro Magnetic Hold Open Devices

Electro magnetic hold open devices are essential door control solutions designed to keep fire and smoke doors securely open under normal conditions and automatically release them in an emergency. These devices are commonly integrated with fire alarm systems so that, when activated, they disengage to allow the doors to close and restore fire and smoke compartmentation. John Barnes Group supplies a premium range of electro magnetic hold open devices from Lockwood, a trusted Australian brand known for its reliable, compliant, and durable door hardware.

These devices are widely used in healthcare facilities, aged care, schools, hotels, offices, and public buildings where it is necessary to keep doors open for accessibility, traffic flow, and convenience, while still maintaining full fire safety compliance. Buy Electro Magnetic Hold Open Device online from our online shop today!

What Are Electro Magnetic Hold Open Devices?

An electro magnetic hold open device consists of a strong electromagnet and an armature plate, with the magnet typically mounted on the wall or floor and the plate fixed to the door. The magnet holds the door open until an electrical signal—usually triggered by a fire alarm or smoke detector—cuts the power, releasing the door to close automatically under the action of a door closer.

This setup ensures that buildings remain accessible and easy to navigate under normal conditions but revert instantly to a fire-safe state during emergencies.

Types of Electro Magnetic Hold Open Devices

Buy Wall-Mounted Hold Open Magnets online

Mounted on the wall behind the door, these devices are ideal for corridors and rooms where floor mounting is not suitable.

Use cases:

• Hospital corridors

• Educational facilities

• Office buildings

Buy Floor-Mounted Hold Open Magnets online

Installed at floor level, these are perfect for situations where wall space is limited or where a low-profile installation is preferred.

Use cases:

• Hotel function rooms

• Retail spaces

• Public building lobbies

Buy Integrated Door Closer Units online

Some models integrate the electromagnet into the door closer itself, offering a streamlined and concealed solution.

Use cases:

• High-end architectural projects

• Minimalist commercial interiors

• Retrofit situations with existing closer installations

Key Features and Specifications

• Holding Force: Typically 50–100kg, sufficient to hold heavy fire doors securely open

• Release Mechanism: Automatic release upon fire alarm activation, power failure, or manual override

• Mounting Options: Wall, floor, or integrated closer mounting

• Voltage: Commonly 24V DC, with some models available in 12V or 240V

• Compliance: Designed to work with fire-rated door assemblies

• Finishes: Standard powder-coated finishes, with stainless steel options for durability

Australian Standards and Compliance

Electro magnetic hold open devices supplied by John Barnes Group meet the performance and safety requirements of:

• AS1905.1: Fire-resistant doorsets – devices must be compatible with certified fire door assemblies

• AS/NZS 60839: Alarm and electronic security systems integration

• BCA/NCC: Fire safety provisions for automatic release mechanisms

• AS1428.1: Accessibility – ensuring door opening widths and positions comply with access requirements

Material and Durability Considerations

Powder-Coated Steel Housings

Provides a durable, corrosion-resistant finish suitable for most indoor applications.

Stainless Steel Components

Ideal for environments with higher moisture levels or where enhanced durability is required.

Applications: Residential vs Commercial

Residential Applications

While less common in single dwellings, electro magnetic hold open devices are useful in large residential complexes for:

• Keeping fire doors open in shared corridors for ease of movement

• Integrating with building-wide fire safety systems

Commercial Applications

These devices are standard in many commercial and public spaces, where accessibility and compliance are both priorities:

• Hospitals and aged care facilities: Allows unobstructed patient transport and mobility aid use

• Education: Maintains open corridors during class changeovers

• Hospitality: Keeps event spaces open for guest flow

• Offices: Improves circulation without compromising safety

Product Selection Guidance

For Architects and Designers

• Select mounting style (wall, floor, integrated) based on aesthetics and available space

• Ensure device finish complements other door hardware

• Specify holding force based on door weight and application

For Builders and Installers

• Confirm compatibility with fire-rated doors and door closers

• Coordinate wiring with fire alarm and building management systems

• Install to manufacturer guidelines for reliable release operation

For Facility Managers

• Choose devices with manual release buttons for operational flexibility

• Consider durability requirements based on traffic levels and environment

• Implement regular testing as part of fire safety protocols

Installation Tips

• Align magnet and armature plate accurately for maximum holding force

• Protect wiring from damage during installation

• Test release function with fire alarm activation before handover

Maintenance and Care

• Test monthly to ensure correct release on signal or power loss

• Clean magnet and plate surfaces to remove dust or debris

• Inspect wiring and fixings for wear or damage

Order from John Barnes Group

John Barnes Group offers Lockwood electro magnetic hold open devices with full technical support and compliance expertise. We assist with:

• Product selection for specific building requirements

• Integration advice with fire safety and access systems

• Installation and maintenance recommendations

Contact us today to ensure your building’s door systems are both accessible and fully compliant: https://johnbarnesgroup.au/contact/