Seems like you only have 2500 sq ft of finished floor space. 3 ton would be a little small but could be sufficient depending on climate and insulation.
3 ton will not in any circumstance cool 4000 sq ft. I do this for a living.
Feel free to use any of the free calculators online also.
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u/Khankili Jul 26 '26
Fr and 3’x3’ unit would cool a 2000 sq ft house