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  1. Replies
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    So much clutter and half truths and only one post...

    So much clutter and half truths and only one post to clear some air.
    The ratio of latent to sensible ratio with a high SEER system can be the same as a low SEER. It all depends on the amount of air...
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    I assume that the 75^F, 55%RH is the room temp or...

    I assume that the 75^F, 55%RH is the room temp or the temp of the air going into the a/c. With the same meter, measure the air temp/%RH coming out of the closest to the cooling coil vent. We can...
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    Most homes get enough fresh air during windy...

    Most homes get enough fresh air during windy weather. Most home do not get enough fresh air during moderate temps and calm winds (-5 mph).
    To check the amount of fresh air that infiltrates your...
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    165

    Most people accept what you describe as ok. You...

    Most people accept what you describe as ok. You also have dust mites in your bedding and fabrics that skin scales accumulate in. Allergies and occasional lack of comfort are includes as a side...
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    What do you expect from a/cs that are designed to...

    What do you expect from a/cs that are designed to operate endlessly at near 100%RH.. I suggest that all a/c should several hours of thorough drying to <50%RH per day. This will stop mold from...
  6. I assume you are operating the a/c blower in the...

    I assume you are operating the a/c blower in the "on" mode because of all of the filtering and air treatment?? With all of your problems, I do not disagree with this but keep in mind, mainting...
  7. This is the easy part, you have a strong sensible...

    This is the easy part, you have a strong sensible cooling load which helps the a/c remove moisture. It will be much harder to maintain <50%RH as the cooling declines but the outdoor dew points are...
  8. Do these units comply with FL new fresh air...

    Do these units comply with FL new fresh air requirements? Codes suggest a fresh air change in 4-5 hours when the unit is occupied. The idea is to provide enough fresh air to purge indoor pollutants...
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    Two stage a/c is not a good idea for a home with...

    Two stage a/c is not a good idea for a home with a long distance to critical area like the master bedroom. On the low stage the fan speed is reduced and amount of cold air to the fartherest room...
  10. No, the erv will reduce the dew point of the...

    No, the erv will reduce the dew point of the incoming air by 50% providing the exhaust air stream is <50%RH. You will be left with the rest of the moisture to be removed by your a/c. It all depends...
  11. All green grass climates have much moisture in...

    All green grass climates have much moisture in the fresh air during warm weather plus the moisture from the occupants. 100 cfm of fresh air with a 70^F dew point needs about 4 lbs. of moisture...
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    First things first. You a/c needs to be setup to...

    First things first. You a/c needs to be setup to maintain 75^F, 50%RH during high cooling loads. This requires the a/c to supply air that has been cooled down to 50^F to remove the excess moisture....
  13. An a/c blower will use almost as much electricity...

    An a/c blower will use almost as much electricity as the dehumidifier. Also it is as critical that the a/c be setup properly to minimize the need of supplemental dehumidification. A properly set up...
  14. You are going to need supplemental...

    You are going to need supplemental dehumidification to maintain 50%RH. An ERV and a/c will not maintain 50%RH whenever the outdoor dew point is high and the cooling load low. This is every evening. ...
  15. Nobody wants the liability of commenting on this...

    Nobody wants the liability of commenting on this problem. Many codes suggest a large fresh air duct like 8" from the outside into the utility area. Add a Carbon Monoxide alert and live at your own...
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    462

    Worked on many Muellers. Charge is listed on the...

    Worked on many Muellers. Charge is listed on the condensing unit. You need flood back to the accumulator yet a warm compressor. Start charging slowly until you feel liquid going back into the...
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    174

    There must be a way to install the dehu so that...

    There must be a way to install the dehu so that you do not run the big blower when the dehu operates. Most dehus have enough blower power to circulate the fresh dry via the a/c ducts throughout the...
  18. The humidity in your home is not causing the...

    The humidity in your home is not causing the buckeling of the floors. This is more likely caused by high moisture levels on the lower surface of the floor. Wood cups toward the dry side and away...
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    Get a different tech out. REgards TB

    Get a different tech out.
    REgards TB
  20. Good job of explaining the dehumidifying verses...

    Good job of explaining the dehumidifying verses infiltration of moisture, using dew point reference.
    We may have created a monster here.
    First, 50-55%RH is adequate to control mold and dust...
  21. Covering the earth with plastic is a must. ...

    Covering the earth with plastic is a must. Reducing the vents to a minimum required by code will reduce the humidity load.
    A good dehumidifier will handle the fresh air for the combustion...
  22. Plastic on the earth and allow a fresh air vent...

    Plastic on the earth and allow a fresh air vent to meet the code of furnace mfgrs requirements. That still allows control of the space with a good whole house dehumidifier.
    Regards TB
  23. Replies
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    Thanks for sharing your experience. Suggest...

    Thanks for sharing your experience.
    Suggest that you figure an air change on the total space in 4-5 hours when the home is occupied. It works out about the same. 100 cfm is an air in 10 hours...
  24. Looking at the install, I would think it will...

    Looking at the install, I would think it will work. It would parrell the DEH3000 controller and use the power supply from the dehumidifier. The output signal from the CO2 sensor goes to the fresh...
  25. Yes, the dehumidifier is controlled separately...

    Yes, the dehumidifier is controlled separately from the ventilation and air recirculation. Dehumidification will not be needed until the outdoor dew point exceeds 55^F, which is much above freezing....
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