While the unit itself has an 8 inch minimum clearance from objects, the clearance from the floor is dependent on the accessories used to mount the PTAC into the wall. If installed with just the standard wall sleeve accessory, your minimum clearance will be zero inches. For more information on other mounting clearances, please see page 2 of the installation guide on the Amana PTAC Unit Wall Sleeve (Item SKU: WS900E).