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<\/p>\nModern railway and metro stations often feature wide, open entrances exposed directly to outdoor conditions. In hot and humid climates, these openings allow warm and moist air to flow into the station, increasing cooling demand and reducing passenger comfort.
\nAir curtains help limit this uncontrolled air infiltration by creating an invisible, high\u2011velocity barrier that stabilizes the indoor climate near the entrance.<\/p>\n
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Entrance Characteristics and Climate Conditions<\/strong><\/p>\n Transit\u2011station entrances typically include wide openings, high ceilings, heavy passenger flow, and direct connection to cooler underground spaces.<\/p>\n In summer months, outdoor temperatures can reach around 35\u00b0C with humidity levels of 60\u201375%, while indoor conditions are usually maintained at approximately 25\u00b0C with moderate humidity. This contrast naturally drives warm, humid air into the station.<\/p>\n How Air Curtains Work<\/strong><\/p>\n Without any separation, outdoor air enters due to temperature differences, pressure variations, wind, and continuous passenger movement. Typical Air Curtain Performance<\/strong><\/p>\n Based on industry studies and field measurements, properly installed air curtains can reduce infiltration by about 60%\u201370%, depending on:<\/p>\n Impact on Cooling Load<\/strong><\/p>\n In large, open transit entrances, the cooling demand for the entrance zone alone can reach 20\u201340 kW, and often higher in busy stations. Energy Savings \u2013 The Bottom Line<\/strong><\/p>\n In real-world conditions, air curtains typically provide net energy savings of about 6%\u201325% depending on entrance size, original infiltration rate, and humidity levels. Additional Operational Benefits<\/strong><\/p>\n Beyond energy performance, air curtains offer clear advantages:<\/p>\n Air curtains offer a practical and effective solution for open entrances in busy transit stations. They limit heat and moisture infiltration, reduce the burden on cooling systems, improve comfort, and enhance overall operational efficiency. Modern railway and metro stations often feature wide, open entrances exposed directly to outdoor conditions. In hot and humid climates, these openings allow warm and moist air to flow into the station, increasing cooling demand and reducing passenger comfort. Air curtains help limit this uncontrolled air infiltration by creating an invisible, high\u2011velocity barrier that stabilizes […]<\/p>\n","protected":false},"author":5,"featured_media":30955,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-30961","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-1"],"acf":[],"yoast_head":"\n
\nAn air curtain creates a controlled vertical air stream across the entrance, significantly reducing the amount of air that crosses between the exterior and interior \u2014 without blocking pedestrian flow.<\/p>\n![\"\"](\"https:\/\/www.orshy.co.il\/wp-content\/uploads\/2026\/03\/fedi-london-94268_1280-300x200.jpg\")
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\nIn hot and humid climates, moisture infiltration is a major factor in overall cooling load.<\/p>\n
\nIn large, always-open stations, savings can be even higher.
\nEven when electrical savings are moderate, air curtains significantly stabilize conditions and reduce peak HVAC loads.<\/p>\n\n
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\nWhen installed correctly, they become a key component in managing climate conditions and optimizing energy use in transportation facilities.<\/p>\n","protected":false},"excerpt":{"rendered":"