This Greek restaurant has no AC. It stays cool all summer on sea breezes alone, via fabric panels that scatter sunlight and move air around. Ancient Persians took the same principle so far they produced ice in 45°C (113°F) desert heat, without electricity.
The Persian wind catcher, known as a badgir (literally "wind catcher" in Persian), is one of the oldest cooling systems on earth. Archaeologists found evidence at Tappeh Chackmaq, a site near Shahrood, Iran, dated to roughly 3,000 years ago. They work on simple physics: a tower rises above the roofline, catches prevailing winds through angled openings, and funnels cooled air down into rooms below. Yazd, Iran still has 700 of them. UNESCO added the city to its World Heritage list in 2017, calling it "a living testimony to intelligent use of limited available resources in the desert." The Egyptians had their own version, the malqaf, shown in 1300 BCE artwork near Luxor.
Persians combined wind catchers with underground chambers to create the yakhchal, an ancient refrigerator. During cold desert nights, shallow pools of water froze solid. Badgirs then kept the chambers cold enough to store that ice through summer, in a desert regularly hitting 45°C. Inside, temperatures ran 15-20°C below the outdoor air, held there by thick insulating walls, steady airflow from the wind towers, and the cool ground beneath. This is how Persians made faloodeh, a frozen dessert, in a climate with no business producing frozen anything.
Willis Carrier designed the first modern air conditioning system on July 17, 1902, at a printing plant in Brooklyn. AC spread fast. Passive cooling vanished from new construction. Air conditioning and fans now consume 20% of global building electricity.
K-Studio, an Athens-based architecture firm, designed the Barbouni beach restaurant at Costa Navarino, Messinia. The fabric ceiling does two things at once: it breaks up direct sunlight before it heats the floor below, and its wave motion keeps air moving on top of basic convection (warm air rises, cooler outdoor air rushes in). K-Studio principal Dimitris Karampatakis: "We didn't want to have a static structure right in front of this dynamic landscape." Afternoon sea breezes at the Navarino coast arrive reliably each day, generated by land heating faster than the sea and drawing cooler air in from the water. The ceiling was designed around that daily rhythm.
Wind towers drop indoor temperatures by up to 22°F (12°C) with zero electricity and no maintenance. Yazd's badgirs have been running continuously for 700 years. A Greek restaurant just did a simpler version, and 324,000 people acted like it was a new idea.
A kinetic ceiling installation at Costa Navarino, Greece, designed by K-Studio for The Romanos resort, uses fabric panels that sway with sea breezes. The wave-like motion filters sunlight and enhancing natural airflow to keep the beachside restaurant cool.