this post was submitted on 09 Jun 2026
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Wikipedia says that about turbine ventilators, but not all of those work passively. I'd assume that a wind-powered vent is not super helpful when there's very little wind, which where I live is frequently the case when it's warm outside.
They're not universally applicable, for sure. They also wouldn't be viable in colder climates where the extra ventilation and temp reduction would be unwanted in the winter, or could cause pipes the freeze.
But in areas with consistent wind and high temperatures, they appear quite useful.
Though even an electric fan is still way cheaper than AC to run. Though if it's hot, there's a good chance a solar panel could drive that fan for free.
There are multiple methods because they work better in some places and not others. Where I live older houses frequently have turbine ventilators and newer roofs have something closer to the earthship style low intake with open vents at the peaks to accomplish the same thing but without the need for maintaining the lubrication.