A:Answer Hello, charlie. In a recessed area or closet installation when a Washer and Dryer are stacked together, a 5-inch space behind the units is required while 6 inches of space above the units is required. In a recessed area or closet installation with only the Washer, it is required to have 1 inch of space on all sides. In a customer cabinet installation, it is required to have at least 1 inch of space on all sides. We hope this helps.