Zero 323AA Light-Duty Mortised Automatic Door Bottom
The patented automatic door bottom technology from Zero ensures an efficient seal against the floor or saddle. As the door is closed, the adjustable plunger is compressed against the door frame, activating a concealed flat spring mechanism. Zero door bottoms are designed to block penetration by air, sound, smoke, and flames.
- Sill Protection Automatic Door Bottom
- Mount: Mortised
- Regular Duty
- Insert: Neoprene
- Finish: Clear Anodized Aluminum
- Specify handing
- Maximum effective drop: 1"
- Fire Rated
- Rated for 5 million cycles
- ZERO’s patented automatic door bottom technology ensures a tight seal against the floor or saddle. As the door is closed, an adjustable "plunger" is compressed against the door frame, activating a concealed flat spring mechanism. This mechanism drops the seal smoothly from the housing in a scissor-like motion as illustrated below. The door seal compresses tightly even on uneven surfaces and retracts automatically when the door is opened.
- All ZERO automatic door bottoms function the same way. The concealed spring mechanism causes the insert seal to activate on the hinge side first. It prevents the seal from dragging along the floor or threshold while the door is being closed to avoid door hang-up or closing delay.
Manufacturer Resources
Product Specs
- Commercial/Residential:
- Commercial
- Product Group:
- Door Trim and Accessories
- Product Subgroup:
- Door Bottom Sweeps and Door Shoes
- Product Type:
- Door Bottom
- Product Finish:
- Clear Anodized
- Performance Rating:
- Fire Rated-UL10c
- Product Substrate:
- Aluminum