Unless the space being cooled has shrunk that is a vey bad idea that is going to led to a long list of repairs and bills in the future. Use the unit that is rated for your house size. Not larger or smaller as both will have costly reapirs for as long as you have the unit. It may be expensive now, but later there will be less to worry about.
53189
$15.00
It is a 3 ton unit.
7 pounds
3
10kw
This is a 10 SEER, 4 ton air conditioning unit.
It depends on the brand, the efficiency, and the type.
I'm not an air conditioning expert, but I would expect that the compressor will run a lot more than it needs to. A 2 ton coil will not cool as much air as a larger capacity 3 ton coil. Experts?
1 tonn used in air conditioning means 1 ton refrigerant used in air conditioning, so 1 ton refrigerant is same 12000 BTU
A 4 ton unit will be adequate usually 1 ton per 400 square ft of living space
Assuming you are referring to air conditioning, and not a ton of coal or a ton of plutonium, then 1 ton of air conditioning equivalent = 12 000 BTU.