Crates of produce stacked with a towel across the top and a fan on the side so that cool air is pulled through the crates and warm air is exhausted out by the fan.

Figure 3a-2. Arrangement of fan and produce for small forced-air cooling.

Crates of produce stacked with a towel across the top and a fan on the side so that cool air is pulled through the crates and warm air is exhausted out by the fan.

Source: M. Boyette.