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2.5 tons denoted by the 30 in the model #. 30,000 btu divided by 12,000 btu = 2.5 tons.
3.5 Ton unit.
4
2 tons
4 Ton
1.5TON.
3.5
3.5 tons
4 ton
3 1/2 ton
2.5 Tons
2.5