3 ton
2 ton
4 ton
2 ton.
1.5 ton
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
4 ton
3-ton
five ton
3 TON