Ag Ventilation Inc

Ventilation Technology For the 21st Century

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)


Tunnel Doors