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Zero International 321AA-36

Light Duty Surface Automatic Door Bottom

Quick Product Details

  • Full Surface
  • Adjustable hex nut allows the door bottom to drop 1/4-3/4
  • Tested to 5 million cycles!
Price: $79.00 /each

SKU: 321AA-36

How do Automatic Door Bottoms work? As the door is closed, the 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. The door seal compresses on either even or uneven surfaces and retracts automatically when the door is opened

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Product at A Glance

Installation Type Full Surface
Material Finish Clear Anodized Aluminum
Door Size Up to 36" Wide, Can be trimmed up to 2" in the field
Door Type For Wood doors

More Info

Zero’s patented automatic door bottom technology ensures
an efficient seal against the floor or saddle. Zero door bottoms are designed to
block penetration by air, sound, smoke and flames.
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.



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