This is a 3 ton unit.
Most manufacturers put a number related to Btu's of the unit in the model. If Rheem is no different then that 42 represents a 3.5 ton unit as there are 12,000 btu's / ton and 3.5 X 12 = 42.
It is a 2 Ton Unit
7.5 ton Heat Pump Packaged Unit, dual circuit
rheem uses the middle numbers to list the BTU/hr. 60 BTU/Hr is 5 Tons.
Two ton. the 024 designates 24,000 btu. 12,000 btu = 1 ton. 24,000 btu= 2ton.
3 ton
That is a 2 1/2 ton unit. One ton of A/C = 12000 btu. The 30 in the model number refers to 30000 btu.
2 ton
4 ton
2.5 ton unit
2 ton.