DescriptionHormann Emergency Release NET 3 for Double Skinned Sectional Doors An emergency release lock and pull cord for electrically operated Hormann double skinned sectional doors without a handle set and universal for all other double skinned Hormann door types and other makes. An essential rather than optional accessory where no other means of entry into the garage is available. Only suits double skinned (insulated) doors and requires a 13mm diameter hole to be drilled through the face of the door. For emergency release devices to suit other makes of garage doors visit the Universal Automation Accessories section on this website. Hormann part number 437 149 (NET 3). Downloads Reviews How it worksSo how does it work? The lock barrel is installed into the door skin and a cord links the lock barrel to the release mechanism on the Hormann SupraMatic or ProMatic garage door operator allowing it to be disengaged from outside of the garage using a key in the event of a power failure.
