Each split system cooling unit has a nominal SEER rating. This rating can be increased with the upgrade of the same series indoor unit. The SEER rating of a system is derived based on the combination of equipment installed in the home. The outdoor equipment (heat pump or air conditioner), as well as the indoor equipment (evaporator coil and furnace, or air handler), play a vital role in the total rating.
We added on to our home and I upgraded my entire heating and air system and ductwork as recommended by the comfort specialist and our power bill went down! We have never been this comfortable in our home since we bought this house! Thanks Jimmy and the whole Wilson's crew.