This top of the line German Hobby Greenhouse (7'8"W x 14'L x 6'11"H, 108 sq. ft.) features the most efficient design for year-round use. The special sloped roof provides maximum head room, but prevents snow build-up. Hail bounces off and the design allows heavy winds to blow right over the unit. It is made with German precision engineering from heavy duty aluminum profiles and 8mm & 10mm UV coated twin-wall polycarbonate glazing. It offers the best insulation in its category (R-factor: 3.0-3.2) and uses less energy than other hobby greenhouses to heat. The unique design of the greenhouse has the best ratio between framing and polycarbonate panels, which allows for maximum light transmittance and less "moving" shade. This unit comes with an oversized rear wall window (30"W x 42"H), two oversized roof windows (40"W x 24"H) with automatic openers, an extra large Dutch barn style front door with lock (30"W x 72"H), two full-length suspended shelves (14"D top-shelf, 25"D bottom-shelf) and 6"H aluminum base to anchor the unit in the ground. One day assembly requires two people.