The trade-off is significant: these cases continuously release cold air into the surrounding aisle. To prevent perishable food from warming and spoiling, the store’s HVAC system must overcompensate, pushing the ambient temperature of the entire store — and particularly those aisles — well below what most shoppers find comfortable.
Fruits and vegetables keep ‘breathing’ after harvest — cold air slows them down
Produce does not simply stop living once it is picked. Fruits and vegetables continue to respire — consuming oxygen and releasing carbon dioxide — long after harvest. This biological process accelerates ripening and, eventually, decay.
Cold air dramatically slows that respiration rate. By keeping the store temperature low, retailers delay ripening, prevent wilting, and extend the window during which produce remains crisp and nutrient-rich. In practical terms, the store is using temperature to pause the natural ageing of every apple and bunch of leafy greens on display.
The entrance air curtain: a third mechanism the source only partially documents
The source identifies a third factor — described as an ‘air curtain’ at the entrance — as part of the explanation for why stores feel cold the moment shoppers walk through the automatic sliding doors.
However, the available text does not provide further detail on how this mechanism works or how much it contributes to the overall temperature. The air curtain is mentioned as a distinct element of retail cold-air management, but its specific role remains undeveloped in the source material.
A system designed for food safety, not shopper comfort
Taken together, the cold temperatures shoppers experience are an engineering outcome rather than an oversight. Open refrigeration cases, produce preservation requirements, and entrance air management all push in the same direction: keeping the store cold enough to protect perishable inventory.
Shopper comfort is not the primary variable the system is optimised for. For people who are sensitive to temperature changes — including older adults who may notice effects on circulation — the gap between a warm outdoor environment and a chilled store interior can feel particularly sharp.
The source introduces the air curtain at the entrance as a third contributing factor without fully explaining its mechanics — a detail that remains an open question based on the available material. More broadly, as open-air refrigeration remains the standard display format in most supermarkets, the engineering tension between food preservation and ambient comfort is unlikely to change unless display technology evolves significantly.
