Flower House FHFH8915XL FarmHouse XL has a compact and lightweight design for easy transport, setup and take down - only minimal assembly is required. Two screened doors and a total of twelve screened vent openings allow for optimum air circulation. With the vents open, outside air circulates throughout the unit to prepare plants for planting in outdoor conditions. With the vents closed, the 100-percent waterproof Gro-Tec material will promote and maintain high humidity levels desirable for a superior growing environment. Gro-Tec material is UV resistant with rip stop protection for longer life of your greenhouse. The Farmhouse XL features a unique, zip-together design. You can zip one to another infinitely. The outer walls form partitions between the individual greenhouses so you can create diverse growing environments to suit your needs. All of our products are made to the highest quality standard, engineered to withstand the harshest climactic conditions.