1.Polyurethane insulation sandwich panel 2.Cold storage room 2. PU panel room 3. CE 4.Temperature ... R22, R404A, Polyol Secondary Refrigerant8.-5 °C ~ + 5 °C: Pre-Cooling, Keep Fresh,-10 °C ~ -20 °C: Freezer Storage-25 °C ... ~ -30 °C: Low Temperature Storage, Quick-Freeze-35 °C ~ -40 °C ... Compendents: Danfoss, Alco, Castol, stailess steel cold storage room