- Lifetime warranted Whisper Governor controls automatic closing speed of door to a range of 6" to 2' per second (used on all doors except Auto-Test model FDO-B).
- Oil tempered torsion springs designed for 50,000 life cycles.
- Structural Angle Guides and Bottom Bar make doors less vulnerable to damage that could prevent the doors from fully closing.
- Approved in all sizes Labeled doors up to 163 square feet not exceeding 13'-6" wide or 12'-0" high Oversize labels furnished on larger doors not exceeding 36'-6" wide or 24'-0" high.
- Available for 4 hour, 3 hour, 1-1/2 hour and 3/4 hour ratings.
- Approved for all wall types (concrete, masonry, structural steel, structural steel with gypsum board).
- Simple-Test Doors are reset from one side of opening reducing testing costs.
- Sure-Close release spring on Simple-Test Doors increase reliability of automatic closings.
- Auto-Test Doors do not require resetting.
- Testing doors in fully closed position will not damage mechanisms.
- Revolutionary Soft-Close RPM governing system limits automatic closing speed to a range of 6" to 9" per second (only available on Auto-Test model FDO-B).
- FinalCote finish.