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  1. #40
    Join Date
    Jul 2009
    Posts
    9
    Quote Originally Posted by the dangling wrangler View Post
    Not that it matters much but, what brand did you go with?
    Goodman, thats what I went with the last time.

  2. #41
    Join Date
    Jun 2005
    Location
    SW Wisconsin
    Posts
    4,963
    There are so many things that affect operating EER, SEER & BTUH that this listed matching stuff, IMO in this situation may be way overrated.

    Make sure there is plenty of airflow for a 4-Ton system, many don't have adequate ductwork systems to fully support 4-tons of cooling.

    It may deliver better airflow with two 500-sq.in. each filter racks exterior to the air handler. Use two low pressure loss filters & don't let them load to much.

    In that Houston heat, make that evaporator coil & condenser work somewhere near their Rated capacities to the indoor temp you select, & you'll be a cool dude. Under heavy indoor load conditions, if its not too hot outside, condensers can eject heat well above 48,000-BTUH.

    If it gets too horribly hot outside, with a heavy indoor load, you could, if deemed necessary, block of some of the return airflow.

    Have your tech look up the free air area of the SA diffusers & multiply the FPM velocity times that to get the CFM. CFM times 30 will Ball-Park the BTUH of each branch run.

    Air is king in air conditioning. Whether its a listed match may be rather inconsequential. Many Mfg'ers just use it to bug out of warranties. - Darrell

  3. #42
    Join Date
    Mar 2005
    Location
    Houston, Texas
    Posts
    11,859
    Quote Originally Posted by MSP76 View Post
    Goodman, thats what I went with the last time.
    I don't see anything wrong with that. Others might.

  4. #43
    Join Date
    Jun 2005
    Location
    SW Wisconsin
    Posts
    4,963
    Quote Originally Posted by the dangling wrangler View Post
    I don't see anything wrong with that. Others might.
    Goodman is okay & has a good warranty & it may work as good as the listed match, who knows.

    A couple of SA/RA dry bulb & wet bulb temps & the CFM, & I'll tell him the BTUH it is delivering.

    A comparison to the match performance would be interesting. - Darrell

  5. #44
    Join Date
    Mar 2005
    Location
    Houston, Texas
    Posts
    11,859
    Quote Originally Posted by udarrell View Post
    Goodman is okay & has a good warranty & it may work as good as the listed match, who knows.

    A couple of SA/RA dry bulb & wet bulb temps & the CFM, & I'll tell him the BTUH it is delivering.

    A comparison to the match performance would be interesting. - Darrell
    I'll bet ya it's real close to a listed match.

    If anyone here can figure it out, I think you can.

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