No meat in the article. They’re using aeromine’s equipment, which uses airfoils to amplify the stack effect and then has a small vertical turbine in the base to generate power.
I’ve seen on one of the science YouTube channels, but it’s been a little while and I can’t recall which one.
Fifteen years from now we’re going to have to make a new suffix to replace “less” because we’ve completely broken it. Maybe we could steal “sans” from the French. British writers use it very occasionally.
The picture in the article shows one turbine. In video reports of this and similar systems I’ve typically seen three or more of these all along the prevailing wind side of the roof. From a maintenance standpoint I would presume that 1) this works better on a building that is broadside to the wind, and 2) offering a discount for other potential customers in the vicinity of other customers would be cost effective once maintenance costs are included.
So not really motionless.
This reminds me of that Dyson "bladeless" fan - it's not bladeless at all, the fan is just hidden in the base.