A:Answer Both SEER and EER are measurements of an air conditioner’s energy efficiency. The SEER rating is the average over a cooling season, and is calculated using a constant indoor temperature and varying outdoor temperatures ranging from the 60’s to over 100 degrees. The rating used for the LG 14,000 BTU Cooling Portable Air Conditioner Cooling, Model # LP1415WXRSM is the EER which is a more constant engineering number used for measuring an air conditioner’s efficiency and is given as 10.1 for this unit. EER is calculated using a constant outside temperature of 95 degrees, a constant inside temperature of 80 degrees and a humidity level of 50%...^IFV