Now let's look at the disadvantages: 1  You don't know where the makeup air is coming from. 2  Contaminants from an attached garage or moldy crawl space can be pulled into the house. 3  Ventilation air probably won't be mixed or distributed well. 4  The only filtration that happens is through the building enclosure.
The Qing Dynasty (1644â1912) was the last Chinese dynasty, and the longest dynasty ruled by foreigners (Manchus from Manchuria, northeast of the Great Wall).
China's last dynasty was the Qing (1644â1912), which was replaced by the Republic of China in 1912, and in the mainland by the People's Republic of China in 1949, resulting in two de facto states claiming to be the legitimate government of all China.