When replacing the outdoor unit of a split system, should the indoor evaporator coil also be replaced?
In most cases the answer is YES for the following reasons! All air conditioner and heat pump outdoor units are specifically designed to work, as a team, with a matched indoor evaporator coil to obtain optimum efficiency and performance. The result of this matched system is a coordinated, top-performance team that ensures the dependability and high-efficiency offered by today’s new units. The outdoor unit can be replaced, and it will work, without replacing the indoor evaporator coil..however, the result is a definite compromise in system performance. The new higher efficient outdoor unit cannot produce the desired savings, on your utility bill, if it is connected to your old inefficient evaporator coil. The government rates all new outdoor air conditioning units by “Seasonal Energy Efficiency Rating” or SEER by testing the new outdoor unit with a new matched indoor evaporator coil. If you purchase a new outdoor unit with a high efficiency rating of 12 SEER or 14 SEER you must replace t
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