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  1. #1
    Join Date
    May 2006
    Posts
    19

    Confused Lennox XC21 AC SEER Lower Than Expected?

    I've had a Lennox HVAC system installed in a new home in Central Florida. The equipment is:

    A/C Compressor - Lennox XC21-060
    Coil - Lennox CX34-62D-6F
    Furnace - Lennox G60UHV-60D-135

    The Lennox literature and website advertise "up to 20.5 SEER" for the XC21. I realized that the "up to" meant that it might not be quite 20.5 based on the coil / air handler, but did not expect that the rating tag added on installation would say it is a 16.5 SEER. That's about a 20% reduction from the advertised number.

    Is this a normal thing? What equipment changes would it take to get this close to the advertised 20.5 SEER?

    Cap

  2. #2
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    33,911
    Typical. Pretty rare for a 5 ton unit to have the highest SEER rating.

  3. #3
    Join Date
    May 2007
    Location
    Central NJ Area
    Posts
    788
    When paired with the correct coil/air handler and or furnace the unit has the capability or reaching "20.5" seer. Most likely the units rating with with a generic coil rates at "16.5".

  4. #4
    Join Date
    Mar 2005
    Location
    burlington county n.j.
    Posts
    9,706
    Quote Originally Posted by capthomas View Post

    Is this a normal thing? What equipment changes would it take to get this close to the advertised 20.5 SEER?

    Cap


    5 ton units are always the "pigs" in the efficiency line up.

    only way to get the rated #s is with 2 and 3 ton units.

    what you have listed is the best match available for that unit.

  5. #5
    Join Date
    May 2006
    Posts
    19
    Thanks for the responses.

    I feel more confident in the install now.

    Cap

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