The LiftMaster FDO-A/FDO-B RetroFit Fire Door Operator is an automated motorized fire protection system. When a fire alarm is actuated, the fire door will automatically close at a rate that meets NFPA 80 regulations. The RetroFit Fire Door operator is compliant with all UL fire rating standards to work with many common manufacturer’s fire doors.
Save time and streamline drop testing by replacing old tension loss door systems with this new technology. Drop test and auto-reset fire doors by simply turning a key.