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  1. Replies
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    511

    Dash Can You Look At My Post

    CAN YOU LOOK AT MY UPDATED MANUAL J POST AND TELL ME WHAT YOU THINK ON SIZING THE HEAT PUMP
    http://hvac-talk.com/vbb/showthread.php?t=178109
    THANKS
    JAMES
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    732

    Will It Matter If I Lower The Inside Temp To 72

    Will It Matter If I Lower The Inside Temp To 72
  3. Replies
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    574

    oversized supply duct

    can the supply duct be too big?, say current set up for 3 ton, changed to 2 1/2 ton.
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    732

    size help on my updated manual j calculations

    HOME BUILT IN 1980
    ORIGINAL CENTRAL A/C WITH ELECTRIC HEAT 3 TON
    CAN YOU TELL ME IF THIS LOOKS RIGHT, I HAVE DOUBLE CHECKED ALL MY INFO FOR CALCULATIONS. LOOKS LIKE ORIGINAL WAS OVERSIZED AND I...
  5. Thread: return air

    by toireht
    Replies
    3
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    475

    return air

    dumb question maybe, is it better to have or add addtional return air to a system. can you add too much return?

    thanks
    james
  6. Replies
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    thanks for the info, I guess what I am needing...

    thanks for the info, I guess what I am needing to do is change the 68 degrees in the software i am using. can you tell me what I should use. I am trying to determine what tonnage to size a new...
  7. Replies
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    dash, don't understand what you mean. can you...

    dash,
    don't understand what you mean. can you explain please?

    thanks
    james
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    1,015

    infiltration summer .42 winter .85

    infiltration
    summer .42
    winter .85
  9. Replies
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    1,015

    carport is same or better insulations used 68...

    carport is same or better insulations
    used 68 summmer and 72 winter

    thanks
    james
  10. Replies
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    3 ton

    the 4 ton tech did not look at the ducts, I will look into making sure they are sized correctly. I think I will probably go with a 3 ton heat pump.


    thanks for the input
    james
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    Hey Ryan Hughes i used hvac calculator...

    Hey Ryan Hughes

    i used hvac calculator residential version.

    summer: 93
    winter: 29
    grains: 116
    daily temp: medium

    the 3 ton did ok as far as I can remmeber, it has been out for several...
  12. Replies
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    help with manual j results

    home was built in 1980
    location: baton rouge, louisiana
    built with 3 ton central a/c with electric heat.

    did manual j and need help determining what to replace with

    sq footage 1662
    ...
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