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In the heart of the Ortigas Center business district in Metro Manila, the Philippines, a newly opened high-end mega shopping mall faced severe customer complaints during its first month of operation. Due to Manila's year-round hot and humid climate, the mall relied heavily on internal-circulation central air conditioning to maximize cooling efficiency. This approach, however, prevented sufficient outdoor fresh air from being effectively introduced. Under the massive impact of

Inside a massive shopping mall in the Golden Triangle area of Bukit Bintang, Kuala Lumpur, Malaysia, the central kitchen of the top-floor food court houses dozens of vibrant food stalls. Because Southeast Asian cuisine relies heavily on fierce stir-frying and high-temperature deep-frying, the kitchen generates massive amounts of heavy grease smoke and scorching heat every day. The previously installed standard exhaust fans failed miserably in this "grease battle," triggering