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).
There was also another government institution called Imperial Household Department which was unique to the Qing dynasty. It was established before the fall of the Ming, but it became mature only after 1661, following the death of the Shunzhi Emperor and the accession of his son, the Kangxi Emperor.