Graham,
My doors from Innotech (BC) have performed flawlessly since we installed them in January, 2010. My daughter's teenage friends almost took them off the tilt-turn hinges a few times when they couldn't figure out the operation, but we got them back on the hinges. Passing the teenager test, I expect they will last forever. I know they install hundreds of these doors in apartments because they are tested airtight (triple seals and cams on all 4 sides). Not sure they have commercial hardware available, but you could check. Juanita answers the phone and can often answer your questions. And Mika can tell you even more about their product line:
Mika....@innotech-windows.com
Glo Windows also has high performance products. They are based in Missoula and import from Germany. Not sure about commercial hardware. Mark Wells is quite helpful:
ma...@glowindows.com
If wood doors are an option, you'll do well with HH Windows from Seattle. Hannes has been building commercial doors for decades:
han...@hhwindows.com
You might also check with Robert Tanner in case Tanner Window & Doors has commercial hardware:
rob...@peakbp.net
Closer to home, you might check NanaWall using German components but manufacturing in Richmond, CA. Matt Thomas is a great source of information:
matt....@nanawall.com
There are so many other choices now, and if these folks can't help you, they might guide you to who can.
Tad