Whirl is small in size and noiseless. It can be extended and installed on building windows, balconies, and exterior wall facades according to space requirements, which not only beautifies the building but does not affect the survival of people and organisms. Because there are no complicated gears, bolts, or mechanical parts, it reduces parts wear and repair, reducing carbon footprint, production and maintenance costs. It can be used for residential electricity, emergency power, and connected to smart grids to sell electricity.
