
Hörmann / Northwest Door · Garage doors
Modern Tech 3550
Use this manufacturer reference to compare the listed door construction and options. Match your door label and configuration before ordering sections or hardware.
Documents and source information (3)
- Brochure (opens in a new tab)
PDF · Language: English
- Quick Guide (opens in a new tab)
PDF · Language: English
- Product Data Sheet (opens in a new tab)
PDF · Language: English
Manufacturer source (opens in a new tab) · Listed source checked 2026-10-19. Confirm the document revision against your equipment label.





















