[–] StuffThatSandwich 0 points 12 points 12 points (+12|-0) ago
The opening is placed facing the same direction as the wind typically travels (apparently some wind towers can change which side is opened too), this sucks air out the top, which in turn sucks air through the hole in the ground.
[–] Thissandwich 0 points 2 points 2 points (+2|-0) ago
Okay. I see the water canal now. That makes more sense.
[–] [deleted] 2 points 14 points 16 points (+16|-2) ago
[–] SpeshulSnowflaek ago
Correct. This device is a giant carburetor, except instead of fuel, it pulls cool air.
[–] Thissandwich 0 points 2 points 2 points (+2|-0) ago
That makes sense. I see the water canal now.
[–] awwisnotafarmpromise 0 points 3 points 3 points (+3|-0) ago
No.
Venturi is caused by reduction in size of port.
These towers use simple redirection and/or the Coanda Effect. Temperature gradients.
[–] KILLtheRATS 0 points 2 points 2 points (+2|-0) ago
Yep. The hot air rising up the tower causes a suction
[–] QualityShitposter 2 points 5 points 7 points (+7|-2) ago
Suction, just like your sister's ass.
Air contracts underground, then heats up as it rises through the house. Both of these pull air through the system. Having the upper window downstream helps improve efficiency, but it could also use a simple flue design.