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).
Transcript of The Decline and Fall of the Qing Dynasty. The Decline and Fall. of the Qing Dynasty: The Chinese. Revolution. In 1800 the Qing dynasty of the Manchus was at. the height of its power. After more than a century of Western humiliation and harassment, the Qing dynasty collapsed in the early 1900s.