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The 36 designates tonnage when divided by 12, in this case, 3-ton
2.5 tons, r22, 12 SEER
12
This is a 5.0 ton 12 SEER straight cool condensing unit.
you have a (2) two ton system, tonnage is done in 12's ie......12 is 1 ton, 18 is 1 1/2 tons and so on.
The 48 in the serial number denotes the tonnage. Divide that number by 12 to get the tonnage of 4.
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4 tons, 48 in the model # is the unit capacity in 1000`s of btu (48,000), There are 12,000 btu in one ton. 48 divided by 12 = 4.
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.
The E1FB042S06A is a 3.5 ton 2 stage heat pump that uses 12 lb 12 oz of freon
This will not fit a model 12
Model R-12