In cold rooms or refrigeration warehouse, it is important to choose a proper door with good thermal insulation, to help reduce heat loss and energy cost. In some areas, there is frequency traffic of moving goods in and out through doors. The door need open and close in cycles frequently. In such case, automatic overhead sectional door will be a top choice. It is with fast running speed and can work in very high frequency. At the same time, its door panel is highly thermal insulated to minimize heat loss. It is perfect choice for busy areas of all kinds of cold rooms, cooler rooms, refrigeration storage. In cold rooms, there must be areas for transporting goods in and out. The temperature in such area is normally between -5 to +10 ℃, as ante room or buffer area between outside temperature and inside cold freezing temperature. Overhead sectional doors can work well in such areas. It can meet requirement of thermal insulation, and also frequency move…