Thanks to French Cemafroid institute ECLER for this handy and informative guide to responsible temperature-controlled distribution.
For valuable energy saving advice for refrigerated vehicles, have a read of this good practice guide to distribution and unloading goods by the ECLER program (Economie Circulaire, Logistique Ecologique et Responsable). 
In addition to featuring BlueSeal air curtains as a way to regulate heat loss during loading/unloading, this is a must-read guide for temperature-controlled logistics that helps operators to preserve valuable energy when transporting cold goods.

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