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  1. Are any of the ducts in the earth? A couple of...

    Are any of the ducts in the earth? A couple of hours of fan "on" everyday will dry the ducts and equipment which disrupts the grow of biological. I would start with the fan "on" for your remaining...
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    You are on the right track. During high cooling...

    You are on the right track. During high cooling loads, your properly sized and setup a/c should be able to maintain the desired temperature/%RH range. Unfortunately, during evenings or cool, damp...
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    Make it clear to the a/c guy that you want...

    Make it clear to the a/c guy that you want adequate fresh air ventilation and humidity control during cool weather. The manual J identifies the hot weather sensible and latent cooling loads....
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    This a can of worms. What is the climate? It...

    This a can of worms. What is the climate? It the earth floor next still exposed? Do you track the temp/%RH in your space? How much fresh air are introducing to your space when you have 30...
  5. I monitored a early GS 3 ton Hp. It had 3...

    I monitored a early GS 3 ton Hp. It had 3 operating capacities, not more. We had difficulty to get the cold air to the top floor on medium/low speeds. We had plenty of heat high floor, but not...
  6. Thread: Rain

    by teddy bear
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    Any area that is left with +70%RH for 24-48 hours...

    Any area that is left with +70%RH for 24-48 hours starts to grow mold on any organic material. It is invisible at first but will make it self known by odor at first and than visible. Get the...
  7. This about the winter condensation of the...

    This about the winter condensation of the moisture from the home that infiltrates the ducts via the registers.
    Regards TB
  8. A/c ducts work in the attic are problem with...

    A/c ducts work in the attic are problem with condensation during cold weather. Avoid if at all possible. We have many posts on condensation/mold collecting in the attic during cold weather. The...
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    You will need to surround your space with +2" of...

    You will need to surround your space with +2" of foam. Do not forget fresh air or you will die but be cool.
    Regards TB
  10. Consider a duct system design for 4 ton of air...

    Consider a duct system design for 4 ton of air flow throttles back to to 2 ton or less. It is using a ton coil and the cold air is being to the lower outlets in the system. This is not good.
    In...
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    How many hours did you run it per year? 40,000...

    How many hours did you run it per year? 40,000 hours for sleeve bears if operate 24/7 is typical. The more starts and stops the shorter the like.
    Good point on savings verses maintinence and...
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    You moisture load is dependent on the outdoor dew...

    You moisture load is dependent on the outdoor dew point, amount of infiltrating fresh air, and the number of occupants. Your current outdoor dew points are about 65^F which are on the lower edge on...
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    The ultimate in providing temp/%RH control is the...

    The ultimate in providing temp/%RH control is the VS blower with a single stage a/c, then add a small whole house dehumidifier. The big benefit from the VS blower is precise control of air flow for...
  14. I should add that the need for fresh air changes...

    I should add that the need for fresh air changes is to purge indoor pollutants and renew oxygen. We are trusting that the outdoor air is clear on pollutants compared to the indoor air. If not, you...
  15. Tough to consul you with the your strong notion...

    Tough to consul you with the your strong notion of filtering. In asthma homes, start with a steady stream of filtered fresh throughout the home. You need a filtered fresh air change in 3-4 hours. ...
  16. Opening you windows at night really loads your...

    Opening you windows at night really loads your home full of moisture. Check your %RH meter after an evening of windows open and high dew points. During several days of rain, you face the risk of...
  17. 800 533 7533 ask for Justin, he will make your...

    800 533 7533 ask for Justin, he will make your dreams come true.
    Thanks for the support.
    Regards TB
  18. What are the temperatures and %RH after a couple...

    What are the temperatures and %RH after a couple rainy days? Do you have a fresh air ventilation to purge indoor pollutants and renew oxygen?
    When the outdoor dew points are high and there is...
  19. This clearly is an example of the gross lack of...

    This clearly is an example of the gross lack of understanding sensible cooling and latent cooling loads. With well insulated, shaded, or low temps while the outdoor dew points are high, a single,...
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    Santa Fe Classic should be in conditioned space. ...

    Santa Fe Classic should be in conditioned space. I you have a closet that you could run a condensate line to the outside or drain would be a better location. Suck on the closet air/door undercut and...
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    With a .45" WG pressure in the a/c supply, ok to...

    With a .45" WG pressure in the a/c supply, ok to connect the dehumidifier supply to the a/c.
    Hope you end up with an Ultra-Aire dehumidifier. Looking forward to the results.
    Keep us posted.
    ...
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    When that dehumidifier fails or does not maintain...

    When that dehumidifier fails or does not maintain <55%RH anymore, check out the Ultra-Aire 70H whole house dehumidifier whick can be connected to your a/c ducts and maintain <55%RH throughout your...
  23. Best to have the a/c contractor installing your...

    Best to have the a/c contractor installing your system to add the Ultra-Aire 70H with the fresh air option and the DEH3000 controller. We will help educate the contractor on how to. Equipment is...
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    Do have a basement and use a dehumidifier? ...

    Do have a basement and use a dehumidifier?
    Regards TB
  25. Replies
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    748

    Sounds like the air may be ok because of the good...

    Sounds like the air may be ok because of the good %RH control during long cooling runs.
    Dry air distribution is important. If the there is an open stairwell, doing the return from lower level may...
  26. What kind of ventilation and supplemental...

    What kind of ventilation and supplemental dehumidification have you considered or been suggested by your contractor? Your home sound like quality and air tight?
    Regards TB
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    The heat of rejection is a combination of...

    The heat of rejection is a combination of sensible and latent cooling plus the heat from the motors. Roughly 3.4 btus per watt. Do not include the outdoor fan motor.
    Regards TB
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    I missed commenting on the .45" WG duct pressure....

    I missed commenting on the .45" WG duct pressure. After you adjust the a/c, check the pressure again. It may be lower with the ideal air flow. >.45" is on the high side but ok, because the...
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    During high cooling loads, a properly setup and...

    During high cooling loads, a properly setup and functioning a/c should be able to maintain <55%RH. If it does not, have a skilled tech fix the a/c and slow the air to the point where the a/c does...
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    It takes 20-30 mins. to load the coil/pan, then...

    It takes 20-30 mins. to load the coil/pan, then moisture starts to go down the drain.
    Any moisture left on the coil at the end of the cycle evaporates back into the home over the next hour....
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    The dehumidifier does add a small amount of heat...

    The dehumidifier does add a small amount of heat while removing moisture.
    Lower %RH allows a warmer indoor temperature while good comfort. Warmer indoor temperatures requires less moisture be...
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    Keep the basement

    Keep the basement <55%RH and there will not be any odor. Odor elimination is a function of the %RH at the cool surfaces under the carpets and behind the insulation on the walls. Circulating the air...
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    Any of these better built homes will benefit from...

    Any of these better built homes will benefit from supplemental dehumidification and mechanical fresh air ventilation. A small whole house dehumidifier with ventilating option will maintain <55%RH...
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    To be a healthy place to live, you need an air...

    To be a healthy place to live, you need an air change in 4-5 hours, this purges the indoor pollutants and renew oxygen. During cold windy weather, this is not a problem, but during calm moderate...
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    Get a temp/%RH meter and place in your basement...

    Get a temp/%RH meter and place in your basement and other parts of your home. Report the levels for the next 2 months. From you post I you know what the temp/%RH was in your home. Any good a/c...
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    Here is a breakthrough. Let us here more about...

    Here is a breakthrough. Let us here more about how the Trane provides lowering the %RH without over cooling.
    Regards TB
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    Tell us about your fresh air ventilation and the...

    Tell us about your fresh air ventilation and the %RH in the different parts of the home.
    You may need a higher level of tech service, like the local Trane Rep.
    Keep us posted. We all learn a lot...
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    Are just looking for traditional indoor...

    Are just looking for traditional indoor temperature control provided by the a/c or are interested maintain low %RH throughout the grass growing season also?
    If you want control mold growing high...
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    With the outdoor dew points reaching near 70^F...

    With the outdoor dew points reaching near 70^F while the home is cool, the finished basement humidity reach 68%RH last week. The basement is 62-65^F, but starting to smell like a basement.
    No...
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    448

    A correct setup a/c needs moderate air flow to...

    A correct setup a/c needs moderate air flow to allow a cold enough coil to remove moisture to maintain <55%RH during typical cooling cycles. Slowing air more causes sweating ducts and possible...
  41. You describe the barrier to real humidity control...

    You describe the barrier to real humidity control well. Many a/c contractors have tried to market dehumidifiers, but the public and the a/c industry have attempt complex a/c solutions to provide...
  42. A/c and dehumidifier interactions are important....

    A/c and dehumidifier interactions are important. The main focus is to avoid over-cooling to maintain the desire %RH for comfort and avoid mold/dust mites/biological. Maintaining low %RH with...
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    Why only 250 sqft.? The under utilized...

    Why only 250 sqft.? The under utilized dehumidifier will recycle more often. It will keep the space dry.
    Regards TB
  44. It is all about money. There are many days that...

    It is all about money. There are many days that you do not need any cooling when the pooling heating needs are the highest. This means you need a second pool heating system. What are you willing...
  45. Most a/c will do a good job of sensible and...

    Most a/c will do a good job of sensible and latent cooling at design conditions in green grass climates. If you want low indoor %RH when there is low/no cooling loads and +60^F outdoor dew points,...
  46. Knowing the climate and style of home makes a...

    Knowing the climate and style of home makes a difference on the %RH settings.
    Basement/crawlspaces are cooler and therefore need lower %RH because they are cooler, if they share the air in the...
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    Indoor air quality, fresh air ventilation and air...

    Indoor air quality, fresh air ventilation and air filtering? How air tight will the house be? Do you care?
    Regards TB
  48. You can add a dehumidifier to your home in the...

    You can add a dehumidifier to your home in the future.

    Your a/c removes mostly sensible heat and a minor amount of moisture. A cool damp home is will not be dehumidified by an a/c.
    Most do...
  49. Keep tracking the %RH during different weather...

    Keep tracking the %RH during different weather conditions. Report the extreme indoor conditions. High indoor % RH and high outdoor dew points should cause the most problems.
    There could be a wet...
  50. How would you like real temp/%RH even on a rainy...

    How would you like real temp/%RH even on a rainy cool day? How would you to be able to maintain your desired %RH using a fraction of electricity of any a/c?
    Include a small whole house dehumidifier...
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