Zero #355, Automatic Door Bottom, Mortised for Metal Door with Double Neoprene Seal, .5" Drop
This Zero International #355, automatic door bottom is designed to be fully mortised into hollow metal doors. It is crafted from high quality material that will ensure smooth operation. It is fitted with a two neoprene bulbs to ensure a quality seal. Seal drops up to .5" and is fire rated. Product is non-handed and custom cut to size.
How to Order: Selecting Seal Type and Size required will determine your total price. To determine size required see How to Measure for an Automatic Door Bottom. Can be cut up to 2" in the field.
The fully mortised aspect of this automatic door bottom is great for high end designer doors and luxury hotels and condo units that prefer their doors retain their clean, unobtrusive look.
It is specifically designed for hollow metal doors with minimum 1.5" wide cavity.
Installation: Installation instructions and screws provided.
Please note, images are for illustrative purposes only. They are not actual photos. Therefore, actual colors may vary slightly and size may be enlarged to show detail. See product specs for exact measurements.
This product has a 1 year guarantee against defects in material and workmanship.
Click here to view our full Warranty Policy.
For a handed version, see our Zero #354 Mortised Automatic Door Bottom.
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QuickShipNo
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ManufacturerZero International
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MPN355
- Product Design
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Mounting TypeFully Mortised
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Door TypeHollow Metal Door
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- Dimensions
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Casing Dimensions1.375" W x .875" H x Custom Cut Length up to 54".
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LengthCustom Cut to Size
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Drop SizeUp to .5" Drop
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Suggested Door Cut-OutDesigned for hollow metal doors with minimum 1.5" wide cavity.
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Door Thickness1-3/4" Thick
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- Installation
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HandingNon-Handed
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Installation ScrewsInstallation Screws Provided
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SizingTo determine sizing required see 'How to Size an Automatic Door Bottom'
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- Special Features
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Add FLO (Notched) SealYes
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- Finishes
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FinishClear Anodized Aluminum (US28)
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- Compliance Details
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Compliance DetailsFire Rated, Air Infiltration Rated, Sound Rated
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ANSI DesignationR3E3241
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How it Works: Automatic Door Bottoms utilize a concealed flat spring mechanism and plunger. When the door is closed, a brass plunger is compressed to automatically lower the seal, starting from the hinge side first. This motion ensures a smooth usage even on an uneven surface and prevents drag. The seal is automatically raised upon opening. These automatic door bottoms have been successfully tested through 5 million cycles!
See also About Automatic Door Bottoms.