Cold air return vents are the ones on the wall
Yes vents can be in the floor instead of the wall.
You can hire someone to unblock the vents or get space heaters.
for air can come in and out this may sound crazy but iam in the are you smarter than a 5th grader show -.-
In my opinion where the supply vents are located is not as important as where the return air vents are located. the supply vents should be located towards the outer walls if possible. the return air vents should be located towards the center of the dwelling if possible. every effort should be made to get the return air vents as high as possible on the wall , if not in the ceiling.Remember you are trying to get the warm air back to the a-coil so it can be pumped outside through the refrigeration lines to the condensing unit. if the ductwork is used for heating also you should put some return air vents down low to get the cool air to the furnace. This is my personal opinion and may not be everyones.
Open, that`s where the cold air is.
because it likes the smell of the floor or wall
90 degrees
They are on the outside wall so they can be vented to the air outside and not throught your house.
It shouldn't unless they are both drawing air from the same source.
The piece of wood that goes in between the floor and wall is called a baseboard.
As long as the floor: in other words, wall to wall.
wall tiles are used on walls. floor tiles are used on floors. if you want to interchange. you can make the wall tile as floor tile and vice-versa