First the kingdom of the bird's nest greenhouses was: "the garden of Eden greenhouse" it in Cornwall, England St Austell, established in 2001, is one of the world's largest greenhouse, was the use of ETFE materials in the world and the largest building in the building. It is known as the eighth architectural wonder of the world. The garden of Eden covers 323,000 square feet. The total cost is 1.39 billion pounds. Infrastructure costs accounted for 54%, greenhouse gas 16%, education facilities accounted for 14% and plants accounted for 9%. Engineering design is "environmental protection", and the surrounding natural environment of organic integration, its tropical plants hall is currently the world's largest greenhouse, covering an area of 4 acres (about 16000 square meters), the dome of the top 180 feet (about 54 m), the largest span of 363 feet (109 meters), and there is no any internal support structure. The structure of the greenhouse is similar to that of a greenhouse.

The garden of Eden of greenhouse materials, the coverage of the hexagonal pillow (pillow) is made up of three layers is called ETFE (ethylenetetrafluoroethylenecopolymer, good long ah, soft) copy hand are what constitute, the material is 100 times lighter than glass, each layer is only 0.5 mm, the service life of the last 25 years. ETFE has a very good thermal insulation and can be "passive heating". So that tropical house can have that high temperature, although there is a pipe that can blow into the hot air, but it can only be used on very, very cold days. In the temperate zone, it is necessary to open up a few triangular blocks of the roof to regulate the temperature, while the bottom vents are also left open, or the plants will be hot.

The garden of Eden itself embodies the concept of energy conservation and environmental protection. This 240 meters long, 240 meters wide and 50 meters of the world's biggest greenhouse is made up of many sizes of the hexagon, entire sphere by galvanized steel pipe and three layers of ETFE like glass chip, this is a kind of ethylene and tetrafluoroethylene polymers, not only service life for 30 years, and can be recycled. The material is very strong, and the light is good but it is not eroded by the sun. The insulation of the greenhouse roof is excellent, and can keep indoor heat and energy. Because the roof has three layers of ETFE wafers that are blowing through the air, creating a nice insulating layer. The temperature in the greenhouse is controlled by the computer system, which is automatically ventilated and heated. And the back wall has the function of the heat sink, absorbing heat during the day, and releasing it at night. The plants themselves also act as a moderating temperature, and when the room heats up, the plants emit more water to cool the air.

Spherical design, whether conceptually or functionally, is a revolution in the leap and use and function of greenhouse development. This style of greenhouse not only has a larger practicality, it can also make the agricultural landscape much better, which is the landscape project of the new rural construction of modern agriculture.
From cost and construction for the convenience of flexibility is better than conventional greenhouse has more advantages, can build a greenhouse in any short range on the ground, such as roof, courtyard, open areas such as public places, is to create microclimate environment the best system for agricultural production, especially on the development of urban agriculture sightseeing agriculture, can reflect its unique advantage and more style, in addition, from its durability, more strong than conventional greenhouse, have stronger KangXue pressure, and wind resistance, is a kind of input costs, stable ecological climate environment, high space utilization model of greenhouse.

The above images are domestic and foreign ETFE membrane application cases.