Buoyancy ventilation would make use of The truth that heat air rises, and cooler air sinks. Stack ventilation is a common example of this. Based on the BBC, all over 7,000 wind catchers have been mounted in public structures towards the top with the 20th century, such as legendary buildings https://eco-friendly-commercial-v43085.ka-blogs.com/82955199/5-simple-techniques-for-eco-friendly-commercial-ventilation