Better-looking return air grille. Check out another DIY return air grille solution here. Do you have a baseboard return air grille that looks like this? Not especially attractive, right? I'm pretty sure o.
Hide the Air Vent: There is a large return air vent behind this cabinet. The cabinet was painted, wallpaper added on the back of the top shelf part, and the bottom of the back is cut out, and with doors covered in decorative metal mesh
If you have central heat and air conditioning, especially if you have registers on the floor, it is DEAD SIMPLE to replace the floor vent covers with something that has more personality. As in, no tools required for floor vents.