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.
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