Abstract: A high efficiency airflow management system can be used to reliably and consistently draw air through palletized product stacks with a minimum of energy expenditure. A racking system is provided with a grid of pallet bays separated from an air plenum/chamber by a wall having an airflow opening for each pallet bay. An air dam selectively permits or prevents airflow through portions of the airflow opening such that airflow may be allowed to flow through the entire opening, only a portion of the opening, or none of the opening.

Abstract: A modular air handler is adapted for installation in a racking assembly behind palletized product. The air handler operates to move air through the adjacent layers of palletized product upon placement of the palletized product in the adjacent space. The air handler can be deactivated in order to prevent unnecessary air flow when no palletized product is present in the adjacent space. A number of the modular air handlers may be provided for a racking assembly, such that individual pallet bays may be activated or deactivated as palletized product is deposited or withdrawn from the various pallet bays of the rack.

Abstract: A spacer for use in stacking a plurality of cases containing a quantity of product on a pallet to form a pallet assembly and to facilitate heat transfer to or from the product is described. Installations for retaining a quantity of product at a desired temperature including a storage warehouse space including a rack-aisle heat transfer system incorporating pallet assemblies including spacers of the present disclosure are also described. The spacer of the present disclosure is useful to transfer heat to and from a quantity of warehouse product through both conduction and forced convection. The spacers provide an airflow path through at least one airflow channel between opposing sides of the pallet assembly so that airflow is not lost through sides adjacent to the opposing sides of the pallet assembly. The spacers further provide a consistent support surface for cases positioned above and below the spacers.