A:Answer The specified depth of 28 3/8" (72.0725 cm - rounded off to 72.1 cm in the manual) for the ENERGY STAR® Qualified LG 4.5 CU. FT. Ultra Large Capacity Top Load Washer with Front Control Design, Model # WT1501CW is from the part that protrudes the most in the back to the front of the unit, or as you described, from the vent panel in the back of the dryer. The owner's manual recommends allowing a minimum clearance of 4 inches (10.16 cm) in the back to ensure sufficient clearance for the water lines...^IFV