Make your HVAC system more efficient while adding a touch of class with floor vents and registers you purchase on Overstock.com. Materials include copper, steel, brass, and aluminum, all of which provide durability and a bit of color to your floor. Designs range from simple, angled lines that diffuse the air in different directions to Victorian styles with ornate metalwork over the face of the vent register, and the selection includes products from established brands such as American Metal, Miseno, and TA Industries. Find pieces that fit just about any size vent, whether you have small, square models or skinnier versions with a rectangular shape. Purchase a register deflector if you want to direct the air towards a specific area rather than straight up. For even more control, try models that open and close with the flip of a lever.