U.S. Government Federal | aw prohibits removal of this label before consumer purchaser. Room Air Conditioner 16 Electronics US A, Inc (LG) Without Reverse Cycle Model [WB021HRSM With Louvered Sides Capacity. 7.500 BTU Estimated Yearly Energy Cost $48 $2 Cost Range of Similar Models Combined Energy Efficiency Ratio Your cost will depend on your utility rates and use. ® Cost range based ably an models of similar capacity without reverse cycle and with louvered sides.