January 01, 2007
Inside and Outside SEER? I have a home warranty policy and I purchased a rider to “upgrade my AC unit to a SEER-13 rated to comply with new Federal Guidelines.” The inside coil is defective, or so I have been informed by my home warranty company. They say that by replacing the coil, they can achieve the SEER-13 rating without replacing the 17-year-old outside unit. My impression of the federal mandate is that due to the age of the unit installed, they cannot. So I contend that they should replace both outside and inside components to achieve both the electrical and environmental standards. Am I mistaken? Tommy Bowdenvia e-mail Technical Editor Steve Greenberg responds: The SEER is a rating that includes a specific outdoor unit and a specific indoor coil. A SEER rating based on a new indoor coil and an old outdoor unit could in theory be obtained, and in theory a SEER-13 result is possible. Though the SEER is a strong function of the indoor coil, it is difficult to get a high-performance system (even in theory) with an older outdoor unit. An old outdoor unit is likely to have significant compressor and coil degradation ...
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