Additional Features * 4 large roof windows provide ample ventilation * Includes 4 automatic roof window openers * Constructed with 16 MM twin wall polycarbonate glazing * Better insulation, stability, and quality than others in its class * Features 283 square feet of space * Door measures 37.5W x 74H inches * Peak height measures 10 feet * Measures 14.1W x 19.8L x 10H feet Featuring 283 square feet of space to grow and care for your plants year-round, the RIGA XL 14.1 x 19.8-Foot Greenhouse is an elegantly designed, superior greenhouse. Made to last, the thick aluminum profiles are permanently attached so they won"t come loose over time. The entire greenhouse features 16 MM twin wall polycarbonate glazing for extra strength that will help protect your plants. The RIGA XL greenhouse allows for maximum head room, with the peak height measuring 10-feet, with no eaves so you can assemble the greenhouse yourself. The greenhouse has four large roof windows and Dutch barn doors which provide ample ventilation for your plants. Four automatic roof window openers are also included. Designed to have better insulation, stability, and quality than other greenhouses in its class, you"ll love the look and feel of the RIGA XL Greenhouse. Assembly is a weekend project for one or two people. About Hoklartherm After erecting his first greenhouse, the ""thermo semicular arch greenhouse,"" in his family garden in 1978, Mr. Werner Hollander, graduate engineer, founded Hoklartherm in 1982. Mr. Hollander"s social circle was very interested in his greenhouse, and more models followed quickly after. Today, Hoklartherm is the biggest manufacturer of high-quality greenhouses made in Germany. Hoklartherm is in the business of developing ideas made of metal and glass for your house, yard and garden. For over 20 years, they have developed and produced greenhouses, winter gardens, pool houses, pavilions, terrace roofings, solar verandas and much more. They take pride in innovation and creativity. * Extra large, well-crafted greenhouse * You can grow plants in any season, even winter * Thick aluminum profiles are permanently attached * 2 large, Dutch style barn doors with a key lock * Allows for maximum head room with no eaves * Doors and windows provide optimal ventilation * Measures 14.2W x 19.10L x 10H feet