M100 Retrofit Fire Door Operators
The simple solution to existing fire door frustrations 
Obsolete fire doors with poorly governed, old style closing systems may actually create hazardous conditions where safety is needed most. By retrofitting M100 Motor, Hand Chain or Hand Crank operating systems on existing fire doors, improved life safety and functional benefits can be achieved while still maintaining UL certification.
M100 Retrofit Operators:
- Guarantee a safe automatic door closing rate
- Allow testing and resetting from floor level, eliminating the costly nuisance of mechanical resetting after each automatic closing
- Maintain the safety of building employees and occupants by ensuring that fire doors are ready to respond when the need arises and help prevent catastrophic losses
- Allow facility personnel to routinely reset fire doors without having to restore spring tension, eliminating facility downtime expense and lost productivity after each auto closing
- Maintain UL Certification / FM Approval of the door while improving its operation
The Decision Is Easy
Cornell makes it simple for facility managers to eliminate the nuisances of old style fire doors while protecting productivity, property and personnel.
- Retrofitting with an M100 operator is easy and economical
- UL Certification allows Cornell Iron Works, Inc. to retrofit the fire doors of most manufacturers with M100 system operators.
- M100 operators are Factory Mutual (FM) approved.
- To meet your preferred method of operation, three M100 operating systems are available:
M100 Chain Operator
M100 Crank Operator
M100 Motor Operator - Additionally, a full line of release devices and safety accessories are available for use with M100 operators.
Use this link to find the Cornell Distributor in your area. They would be happy to inspect your fire doors and provide you with the most safe and secure operating solution.