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).
Confidence votes 15. In the official history of China, Xia is the first dynasty of China, when it was still slavery society. Qin Dynasty was the first feudal society in China.Qing was the last feudal dynasty and replaced by the Republic of China in 1911, which was treated as the capitalist society in Chinese history. Nearly 40 years later, it was replaced by the People's Republic of China in 1949.onfidence votes 15. In the official history of China, Xia is the first dynasty of China, when it was still slavery society. Qin Dynasty was the first feudal society in China.