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S2021 Belt Drive Slide Door -Standard Header

Series 2021 Belt Drive 

Built on an attractive 4.5" x 7" header, the ProSlide™ 2021 is engineered for longevity and quiet operation in high traffic applications. The ProSlide 2021 is available in an Eco/U-Factor option for energy efficiency and LEED certification. The Series 2021 is verified by SCS Gloal Services for its Environmental Product Declaratiom.

Exclusive standard system features:

  • Heavy duty drive-train tested to 1,000,000 cycles
  • Two-year limited warranty
  • Durable 4.5" X 7" header
  • High quality carriage wheels with ball bearing design
  • Adjustable astragal with double weatherseal for energy efficiency
  • Easily adjustable opening & closing speeds
  • Manual operation mode in case of power failure


  • Medical Offices
  • Asisted Living
  • Hospitals
  • Urgent Care
  • Data Centers
  • Financial Institutions
  • Warehouses
  • Airports
  • Courthouses


  • Entertainment Venues
  • Food Stores
  • Hotels
  • Restaurants
  • Retail Stores
  • Shopping Centers
  • Fire & Police Stations
  • Government Buildings

Where Used:

  • Main Entrances 
  • Security Doors
  • Emergency Entrances
  • Internal Security Barriers
  • Lounges 
product namebreakoutheader sizehandinstallationarchitectural detailsarchitectural specscadAdd to My Inquiries
ProSlide Series 2021Full 4.5" x 7"SO-SX or SX-SOPerimeter Mount
ProSlide Series 2021Partial4.5" x 7"O-SX or SX-OPerimeter Mount
ProSlide Series 2021None4.5" x 7"O-X or X-OPerimeter Mount
ProSlide Series 2021Full4.5" x 7"SO-SX-SX-SOPerimeter Mount
ProSlide Series 2021Partial4.5" x 7"O-SX-SX-OPerimeter Mount
ProSlide Series 2021None4.5" x 7"O-X-X-OPerimeter Mount
ProSlide Series 2021Partial4.5" x 7"P-SX or SX-PSurface Mount
ProSlide Series 2021None4.5" x 7"P-X or X-PSurface Mount
ProSlide Series 2021Partial4.5" x 7"P-SX-SX-PSurface Mount
ProSlide Series 2021None4.5" x 7"P-X-X-PSurface Mount

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For help selecting the right products for your application or for additional product information please contact us using the form on the right or by calling our Toll Free number:

  • Main Office
    Horton Automatics
    4242 Baldwin Blvd
    Corpus Christi, TX 78405

  • General Inquiries
    Toll Free: 800.531.3111
    Phone: 361.888.5591

  • Customer Care
    Phone: 866.245.7170
    Fax: 888.283.3880

  • Horton OEM Parts
    Fax: 800.531.3109

  • Transit Inquiries
    Phone: 361.866.6642

For Specification And Architect Support, Please Contact Your Regional Business Manager.