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  1. Replies
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    If you are even close to entertaining the idea of...

    If you are even close to entertaining the idea of a new unit, it would be an opportune time to asses the house as a whole. There is a very good likely hood that the existing unit is actually two...
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    Outsourcing or not, Home Depot still needs to be...

    Outsourcing or not, Home Depot still needs to be informed of your bad experience. They DO choose who they deal with, and have to know about the experiences customers have with their partners.
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    Understanding that the OP is in florida, I would...

    Understanding that the OP is in florida, I would agree with that. however, in drier climates, 2-stage can be great, even with large spread out homes, but ideally only the compressor stages down. ...
  4. Did you ever try a respirator to see if the...

    Did you ever try a respirator to see if the headaches go away with it? Usually, inhaled contaminants do not cause rapid response headaches like you describe, but building pressure imbalances could,...
  5. Air leaks are rarely widespread. The air isn't...

    Air leaks are rarely widespread. The air isn't passing through the solid brick. That's the point of the testing, to locate the actual leak location, so it can be fixed there.
  6. I brought it up because if you had one done PRIOR...

    I brought it up because if you had one done PRIOR to all this, you likely could have gone about this smarter from the onset. There were reasons why so many were skeptical of you duct caused...
  7. You are upset, and I understand this - but this...

    You are upset, and I understand this - but this is not a fault of 'mini-splits'. It is the fault of a poorly designed system. As far as I can tell:
    - You had these installed as a knee-jerk...
  8. Those numbers back up what's been saying here.....

    Those numbers back up what's been saying here.. Your problem is high infiltration. Once moisture is removed from the space by the dehumidifier, it seems to come back quickly. There has to be a...
  9. That would likely increase flow, but you'd have...

    That would likely increase flow, but you'd have to verify that the existing duct IS too small. ideally, by measuring the pressure drop over the length of the duct. The other 'problem' with doing as...
  10. If you are keeping your home at 70F, that is the...

    If you are keeping your home at 70F, that is the source of your floor boards warping. As teddy bear mentioned previously, cooling the house to less than the outdoor dewpoint is risky. This causes...
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    The thing is, that solid ice is not necessarily...

    The thing is, that solid ice is not necessarily 32°F. It could be -40°F for all you know. Only when you have ice and water in equilibrium, at sea level, are you ensured of it being 32°F. It is a...
  12. The point he was trying to make, is that a damper...

    The point he was trying to make, is that a damper closed down in one trunk is not a practical way to increase flow through an undersized duct. The pressure drop over a length increases expontially...
  13. I tried.

    I tried.
  14. If you have localized high humidities, you have...

    If you have localized high humidities, you have far too much infiltration for any system to deal with. If the house was in any way sealed up, the levels would even out throughout the home, and the...
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    Clamping on a solid ice cube won't transfer heat...

    Clamping on a solid ice cube won't transfer heat well. This is why you calibrate to a ice bath. That is so you KNOW the robe is submerged in 32F.
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    'calibration' is a complete science on its own. ...

    'calibration' is a complete science on its own. Ultimately, it is the process of making your instrument report an indication that is accurate. This is usually done by comparing to a 'standard'.
    ...
  17. Sorry about your experience, but that is not...

    Sorry about your experience, but that is not normal or expected. There is nothing that makes a mini-split perform any different than a conventional ducted AC. If you are unsatisfied, you need to...
  18. Plenty of homes here in SoCal have the furnace in...

    Plenty of homes here in SoCal have the furnace in a closet off the hallway, with a louvered door, pulling air from the house, without a definite outside air vent. I can't speak to the current code...
  19. If you really want to calculate room by room heat...

    If you really want to calculate room by room heat loads, you can do as you describe. Then, add them together, and determine the total heat load, and more specifically, what percentage of the whole...
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    Having steam and hot air blowing on the stat is...

    Having steam and hot air blowing on the stat is going to cause the AC to run MORE, making the space colder than desired setpoint. If your house is not cooling enough now, moving the stat is not...
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    Its disconcerting that they are doing their load...

    Its disconcerting that they are doing their load calc to decide between 4 of 5 ton - instead of letting the load calc actually work to tell exactly what the load is. Going in with a preconceived...
  22. For many many years, energy prices were low...

    For many many years, energy prices were low enough that there was not enough emphasis placed on proper building science. This resulted in most of the trade working off thumb rules, because they got...
  23. like bear said, without being there, we can't...

    like bear said, without being there, we can't directly comment on your combustion air flow. One thing is certain, you DO need to have proper supply of air to your furnaces and water heater. That...
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    We cannot say over the internet. The proper way...

    We cannot say over the internet. The proper way to determine this is:

    ACCA Manual J Heat Load calculation: Determines the amount of heat load throughout the structure. From this, you can...
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    That big system, with the tiny return, is WHY you...

    That big system, with the tiny return, is WHY you current system:

    1) removes humidity so well. The air flow is so restricted, the discharge air off the coil is very low, maximizing moisture...
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