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).
It was preceded by the Ming dynasty and succeeded by the Republic of China. The Qing multi-cultural empire lasted almost three centuries and formed the territorial base for the modern Chinese state. The dynasty was founded by the Jurchen Aisin Gioro clan in Manchuria.urhaci declared himself the Bright Khan of the Later Jin (lit. gold) state in honor both of the 12â13th century Jurchen Jin dynasty and of his Aisin Gioro clan (Aisin being Manchu for the Chinese é (jÄ«n, gold)). His son Hong Taiji renamed the dynasty Great Qing in 1636.