Maximum growing area with two double-tiered, built-in bench frames providing you over 76 square feet of bench area in the 8′ x 16′ unit for hours of year-round gardening pleasure - and you’ll love the 8 foot height! large louvered air vent and are covered with advanced double-walled Solexx™ paneling. Freestanding and requires no special foundation or site preparation - just level the ground beneath it!