A relatively easy task.
Moving an air vent on the floor.
Pick a spot where you want to move the a c vent.
Place plastic sheeting underneath.
The first floor has the living room kitchen dining and bath with the stairs fireplace chimney in the center of the first floor.
All of the 1st floor rooms open onto each other.
If it s a cold air return then this sounds fine it s done all the time.
The cold air return is fairly close to the center of the house and all the heat vents are at the exterior under windows.
Almost like a studio.
I have seen some other methods for re routing the floor vent.
Floor vent to what where.
But this is a task you can handle.
If it s a warm air vent then he needs to be very careful to seal the wall space so that no air escapes upward and possibly into the attic.
In addition there may be a code restriction on having a warm air vent routed this way without regulation ductwork.
One such method involved building a wooden box to channel the air out the front.
Place the top section of the duct in the new location and reinstall it by driving galvanized screws through the holes into the underside of the floor.
Cut a straight line along the duct with tin snips near the old vent location.
Drive a screw through the ceiling in this position to mark the spot.