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).
The Manchu-led Qing Dynasty was preceded by the Han-led Ming Dynasty (1368â1644). The Qing capital was Beijing, where emperors continued to rule from the Forbidden City. In the age of exploration/colonialization, China remained isolated and expanded its borders and population.