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).
Ming dynasty. For other uses, see Ming (disambiguation) and Ming Dynasty (disambiguation). The Ming dynasty was the ruling dynasty of China â then known as the Empire of the Great Ming â for 276 years (1368â1644) following the collapse of the Mongol-led Yuan dynasty.