> Jaali’s cooling feature relies on the Venturi effect in a similar way to an air conditioning unit. "When air passes through holes, it picks up velocity and penetrates afar. Due to the small apertures, air gets compressed and when released it gets cooler," says Pandya.
When the air passes through the holes, yes, it picks up velocity, but that velocity is lost immediately upon exiting so it can't penetrate further than if the restriction wasn't there. In fact it must lose some energy due to the restrictions so it will penetrate less and you can easily observe this when using a mosquito net in window.
Secondly the air is not compressed through the holes, the pressure actually drops as the speed increases. Unless I completely misunderstand the Venturi effect, in which case please correct me.
The purpose of the lattices is to let in air and light while restricting direct sunlight. That is important enough especially since it's passive, but shades are being used in modern buildings, it's not some lost art, and it is clearly nothing like AC. It's not even like modern ventilation or mobile shades which can let air only during the cool nights.