Requiring large amounts of electricity and water, air conditioning is a major driver of energy use globally that has remained largely unchanged for decades. SkyCool has developed a radically efficient water-cooling module passively used to reject heat to outer space from residential and commercial buildings. Modules enerate water 3-5°C below air temperature with zero water losses and only require electricity to pump water through them: a remarkably efficient air conditioning systems. SkyCool has fabricated modules capable of cooling at a scale relevant to residential and commercial buildings, testing those modules performance in real-world building scenarios, and addressing key questions of cost and durabilit
