These magnetic register sheets help your furnace or airconditioner use less energy. Use a magnetic vent cover on a ceiling-lever return air register so only lower, cool air is returned to the furnace. Magnetic register covers help save on energy
The Shockingly Easy Way to Beautify Your Ugly Air Vents
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.