Beyond the frozen layer is appropriate, the basic design is based on the cold greenhouse geological structure and climatic conditions determine local, regional basis crisp relatively darker soil. Not annual production of greenhouse than all year round greenhouse production more deeply, rubble or river stone foundation to add padding above 2030 cm-thick ground beam, floor beam above the masonry wall, the wall must have insulation sandwich, Insulation sandwich filled with benzene board, perlite insulation materials. Wall extend beyond 70 meters recommended to stay joints, the back wall of the greenhouse according to the nature of the greenhouse use, leave some louvers for ventilation in winter use. Rainbow greenhouse wall to the lower front masonry arch ceiling embedded parts, for use when installing arch. Greenhouse wall height according greenhouse span, generally eight meters across the back wall height 2.5 m greenhouse is appropriate. 7.5 meters across the back wall height 2.3 m greenhouse is appropriate. Greenhouse glass greenhouse natural ventilation relies on natural ventilation most of the time to adjust the indoor environment. In the form of large-scale structure of production of glass greenhouse is generally double slope Greenhouse, provided in the form of ventilation louvers in the side walls and the roof is. The total area of ??its ventilation is not less than 15% of the area of ??the greenhouse, preferably greater than 30%. When the roof shutters open, the sash can be more than the best level upwards inclined 100 to the horizontal angle when fully open, then get a good ventilation. Natural ventilation ventilation and wind speed, wind direction, louver position, venting about the area and the temperature difference between indoor and outdoor temperature. When venting a total area of ??27% when the indoor area of ??Harbin greenhouse construction, if only roof ventilation, greenhouse construction, even if the outdoor wind speed reaches 10 km / h, but also reach 0.75 times per minute ventilation perfect rate; when the roof and side walls venting louver fully open, Mudanjiang greenhouse construction, in almost no wind, the ventilation rate can reach 0.68 times / minute, close to the normal recommendation of 0.75 beats / minute ventilation rate . Greenhouse construction, Tian Yun vegetable wholesale, Yichun greenhouse built by the Cangshan County Tianrun cultivation of professional cooperatives. Greenhouse construction, Tian Yun vegetable wholesale, Yichun greenhouse construction is Cangshan Tianrun planting cooperatives (www.tianrun8.net) this year introduced a new upgrade, the above picture is for reference only, please call or pictures on this page contact telephone number, to obtain the latest information, contact: Sun Jinhu.