Climate change is driving the need for cool spaces, which currently relies largely on mechanical air conditioning that consumes power and contributes to emissions. This article examines how to create a passive cooling system with good ventilation using no mechanical equipment, achieving sub-ambient temperature cooling that could be extended to larger homes and structures. As such, it supports SDGs 3 (ensuring access to cool livable spaces), SDG 9 (more sustainable infrastructure to cool homes), and SDG 13 (reducing the need for traditional air conditioning).