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Magnetic timed door holder

Product 43


Magnetic timed door holders to hold doors open for a specified period of time

Not available to purchase online.

We need to ask you a few more questions and ensure this is the suitable product for your needs.

To order please call us on +44 (0) 1 304 842 555


Electromagnetic timed door holder which operates independently of the existing fire alarm system. Holds doors open for up to 57 seconds, thus preventing loss of energy and heat.


– Works in conjunction with existing door closer, holding single doors or pairs of doors open magnetically- Prevents buckling and distortion to the door – a common problem with permanent door holding systems
– Ideal for hospitals, residential homes, offices, computer suites, hotels and warehouses
– Can also be configured to hold doors open until someone has passed through them – ideal for the blind or visually impaired

Application Instructions

Both the MH24 (24 Volt) and the MH240 (240 Volt) units are mounted in a powder coated steel casing
with brushed stainless steel front covers. The armature plate is mounted on a plastic back plate with a
flexible ring.
The armature plates are made of a special metal and designed to release easily when power is
removed. NO magnet sticking.
Both MH24 and MH240 can be wired to any type of fire alarm system with the correct voltage.
MH24 can also be used with the Envirohold Timed Door Hold System, which does not require wiring to
a fire alarm system, for holding doors open for up to 57 seconds.
Should the fire alarm system be unable to take anymore load, Envirograf® can supply a 240 volt to 24
volt control unit to control up to 2 magnets.
Where doors are far away from a wall, Envirograf® manufacture a metal plate to go by the architrave to
mount the magnet box onto; finished in white or brown.

Case Studies

Order References / Sizes

MHK1     Kit for one door consisting of 1 control unit, 1 electromagnet ,and 1 armature plate

MHK2     Kit for two doors consisting of 1 control unit, 2 electromagnets, and 2 armature plates


Where magnets are only required to wire into an existing or new fire alarm system to hold the door permanently open. Envirograf® Magnet and Armature Plates can be supplied separately.


MH024      24V Magnet & Armature

MH240   240V Magnet & Armature


Where sufficient supply is not available on the existing Fire Alarm System or no Smoke detector circuits,

We can supply a Control Unit for this. 240V in 24V out with terminals to wire to the magnets.

Terminals to wire to 24V MH24 Magnet and Armature, and a normally open or closed circuit to wire to existing Fire Alarm System.


ES/MDHB              Magnetic Door Holder Bracket for fixing the holder (white or brown)