The EFA-SST Efficient is a space-saving and springless high-speed spiral door, which was designed specifically for installations of restricted or limited dimensions. The highly insulating door blade, and the chain drive make the compact frame dimensions possible. The door is virtually maintenance-free due to the lack of any counterbalance. Owing to the selected drive system and the specialist equipment, the door has attained resistance class WK 2, meaning it automatically becomes intruder-resistant each time it is closed.
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There are a variety of applications for the EFA-SST Efficient range, including internal use and as a secure hall closing door. Fitting it with an on-site canopy means that the high-speed door can also be installed externally.