What type of racks should be used in refrigerators to allow circulation of cold air?

Using slotted racks in refrigerators is essential for allowing proper circulation of cold air. The design of slotted racks promotes airflow around food items and enables the cold air to reach all parts of the refrigerator more effectively. This airflow helps maintain consistent temperatures, preventing hotspots and ensuring that all items stored within the refrigerator are cooled uniformly. Proper air circulation is critical not only for food safety but also for the preservation of food quality, as it reduces the chances of bacterial growth and spoilage.

In contrast, solid racks can obstruct air movement, leading to uneven cooling and potential areas where food may not remain at safe temperatures. While spacing racks equal distances apart might seem beneficial for airflow, it does not guarantee the circulation effectiveness that slotted racks inherently provide. Hence, utilizing slotted racks is a best practice in refrigeration to optimize cold air distribution.