Correct, and if the door has good weather stripping it would also help keep dust out of the house. If you have fresh air intake in the shop with the door not sealed properly then the house hvac could pull dust into the house.
If say I'm sanding Sheetrock in one room I would seal the door with tape and cover all hvac vents so two things happen 1. Air is not coming into the room and pressurizing it. 2. The hvac return is not sucking it out of the room.
If possible I'd put a fan in one window blowing out and open another window for fresh air.
It's kind of the same situation.
Thank you