Introducing our new Tunnel Doors with the Strap Drive Operating System (Patent Pending)


  • Eliminates all cables and rigging issues
  • Polyester Military grade Straps
  • Direct Pipe to Hub Drive system 
  • Coated Galvanized Steel Doors
  • 304 Stainless Steel Hinges
  • 2 inch thick R9 insulated solid Doors
  • Simple installation!  Tongue & Groove connecting Door sections
  • Available in 5' and 6' heights (custom heights may also be available upon request)


Strap Drive Operating System may also be sold separately.  Our Strap Kits can attach to most common Doors.


Tunnel Doors


Ag Ventilation Inc

Ventilation Technology For the 21st Century