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2
2.5
five ton
5 ton
3 ton
5 ton heat pump, 12 SEER,most likely single stage.
Your first set of numbers gives you the tonnage, so this is a 2 ton; your "4" number represents a 460-volt electrical requirement
2.5 tons. 1 ton =12,000 btu so 30,000 btu=2.5 tons. The 30 in the model # denotes btu of the unit in 1000`s.
3ton
2 tons
2.5
4 ton