I think it should be fine. It would depend on what type of things were in the 700 feet of course. Do you have heavy machines making lots of heat? does the 700 foot room have very high ceilings? these type of things would have quite an effect on how well the 3 ton air conditioner would work.
600 square feet.
Yes, a 4.5 ton air conditioner would be the minimum size for 2000 square feet.
NO
yes
yes
Yes
The Kwikool Commercial SWAC4221 42,000 BTU Water Cooled Portable Air Conditioner cools a room up to 150 square feet.
1500 sq ft.
300 square feet, or about 15 x 20 feet.
around 400 SF, not ft
The size of the area that a portable air conditioner will keep cool varies depending upon the number of BTU's the unit has. For example, a 12000 BTU air conditioner will cool an area between about 500-600 square feet while a 8000 BTU air conditioner will cool an area of approximately 300-350 square feet.
400 sqft per ton. So no.