Why is the SEER rating on the Energy Guide on the outdoor unit different that what was quoted in the proposal?
Each split system cooling unit (and heat pump) has a nominal SEER rating. This rating can be increased with an upgrade of the indoor fan coil or furnace and evaporator coil. The SEER rating of a system is derived based on the combination of equipment installed in the home. The outdoor equipment (A/C or heat pump), as well as the indoor equipment (fan coil or furnace and evaporator coil), play a vital role in the rating. The Energy Guide rating only lists the nominal SEER rating for each unit.