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No. 1200 sqft.
Yes will work on that size house.
You should get 500 tonne air conditioners for a two server room.
No. Dense air is cool air.
Cool air, it is more dense.
Warm air is above cool air.
The wind makes the air cool.
Warm air is less dense than cool air.
The installation and maintenance manual for your unit should tell you that. I would say 8-10 and a minimum air flow of around 1200 cfm.
jaguars blow, the ac is making the cool air. turn it off, to stop cool the cool air.
a tornado will form
hot is hot cool air is cold