Originally Posted by bud16415
it can float in the rough opening and still seal out the weather?[/FONT][/SIZE]
The door jamb needs to be surrounded by a flexible airtight membrane.
The stiffness/compliance of the membrane may have to be such that the door jamb will need to be reinforced so that it doesn't change shape due to the force exerted by the membrane.
The membrane material and cross-section will determine compliance.
Search on makers who would make such a U-shaped or S-shaped membrane. The membrane compliance needs to be small enough so that people don't notice the door frame moving as they use the door. Ask how the compliance changes with temperature. They will ask you how much the door & frame weighs.
There are probably commercial uses for such a device.
Of course, the interior & outside walls need to have a sliding fit with the door jamb but that is also airtight. I'm thinking a much more compliant U-shaped membrane.
This project may be quite ambitious. If it works, make a YouTube video and sell access to it.
BTW, your small font is killing me.