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  1. Ansered my own post, wow. ...

    Ansered my own post, wow.

    http://www.floridabuilding.org/fbc/committees/Chairpersons/Mechanical/MECHANICAL_Airtightness_and_Ventilation_Approaches_Final.pdf
    Regards TB
  2. Fl requires Blower Door testing/fresh air ventilation 7-2015

    Starting July 2015, new residential construction requires certified air tightness and fresh air ventilation. More details to follower by anyone how knows.
    Info from anyone who knows. I am looking...
  3. Hope you will consider the Ultra-Aire whole house...

    Hope you will consider the Ultra-Aire whole house dehumidifier.
    Regards TB
  4. Have put down he will do when the %RH rises above...

    Have put down he will do when the %RH rises above 65%RH. get a Temp/%RH meter to monitor.
    Keep us posted.
    Regards TB
  5. Get that last statement in writing. I agree that...

    Get that last statement in writing. I agree that with a significant cooling load and a proper setup, the desired temp/%RH will work. When the cooling load declines to 15 min. per hour, the %RH will...
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    A small amount of fresh will leak in with fan on...

    A small amount of fresh will leak in with fan on "low" and the HRV off. It is no big deal.
    Make sure you use the HRV whenever the windows are closed and the home is occupied. If you live in green...
  7. Ok, ask for a technical description of how the...

    Ok, ask for a technical description of how the a/c removes moisture during low/no sensible cooling loads with high outdoor dew points and moisture from the occupants. We have experts here that tell...
  8. Replies
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    Yes you can operate a whole house dehu and a HRV...

    Yes you can operate a whole house dehu and a HRV in the same ducts.

    A couple basics, you need to ventilate well built homes when occupied to purge indoor pollutants and renew oxygen. Home...
  9. They do this after they get a cold cooling coil....

    They do this after they get a cold cooling coil.
    Regards TB
  10. A/c removes moisture during high cooling loads...

    A/c removes moisture during high cooling loads with long run times. During the cool days and evening the a/c does not run while the outdoor dew point stays high. A small whole dehumidifier is the...
  11. What is the climate? Regards TB

    What is the climate?
    Regards TB
  12. If you want 50^F, with

    If you want 50^F, with <70%RH, which is a 40^F dew point, the cooling coil must be <35^F. Slow the air flow through the coil to get to <35^F evaporator temperature. You had a bend the fan blades,...
  13. For a/c to remove 1,000 btus of latent heat, you...

    For a/c to remove 1,000 btus of latent heat, you need 3-5,000 btus of sensible cooling load. Four occupants and 100 cfm of fresh air infiltration/ventilation is about 4-5,000 btus of latent...
  14. Replies
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    A good dessicant dehumidifier is your best...

    A good dessicant dehumidifier is your best chance. You need a <12^F dew point in the space which means your dehu needs to deliver 0^F dew point air. The big question is how much capacity to you...
  15. Replies
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    Temp/%RH is the meaningful inside the home verses...

    Temp/%RH is the meaningful inside the home verses the outdoor dew point is the important number here.
    Nest you need a specific amount of fresh air passing through the home. The occupants add...
  16. Someplace in the Carrier tree there is a person...

    Someplace in the Carrier tree there is a person who can fix the problem. Shake the tree hard enough and the person will fall out. I marvel at the C and T system but fear any trouble shooting as...
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    895

    [QUOTE=somanychoices;19963441] This is...

    This is correct. Increasing the pressure decreases the amps and motor load. Prop fans are the reverse.
    Regards TB
  18. Thread: outside air

    by teddy bear
    Replies
    6
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    217

    As an industry, we try to avoid any fresh air...

    As an industry, we try to avoid any fresh air ventilation. The reason is we are unable to maintain <50%RH during low/no cooling loads and +60^F outdoor dew points.
    Living in a modern air tight...
  19. Thread: outside air

    by teddy bear
    Replies
    6
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    217

    Not sure what the requirement of fresh air is...

    Not sure what the requirement of fresh air is from your notes. Usually they are a specific number of cubic feet per minute per design occupancy. Like 7 cfm per occupant, 4 bedroom is 5 occupants. ...
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    Your results suggest that the HRV is working....

    Your results suggest that the HRV is working. Relax and enjoy. Just let is operate year around to get some fresh air during the moderate, calm weather throughout the year.
    A properly ventilated...
  21. Replies
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    895

    Consider upgrading the dehumidifier part to the...

    Consider upgrading the dehumidifier part to the Ultra-Aire 70H which could include a small amount of filtered fresh air to assure adequate fresh air during the spring/summer/fall seasons to purge...
  22. Replies
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    http://www.co2meter.com/collections/data-loggers/p...

    http://www.co2meter.com/collections/data-loggers/products/tim12-desktop-co2-rh-t-monitor-data-logger

    https://www.netatmo.com/en-US/product/weather-station#view2
    Here are two of the lower cost CO2...
  23. Replies
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    895

    A side not, restricted air flow decreases the amp...

    A side not, restricted air flow decreases the amp draw/load on a fan motor, not increasing the load.

    I would also consider general house tightening if your home humidity levels are low during...
  24. Replies
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    246

    Generally speaking-there are several variables...

    Generally speaking-there are several variables that should be considered. In 2,000 sqft. home with 5 occupants, Bladloonie's comments are correct.
    As home get bigger and the occupants fewer,...
  25. Replies
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    1,311

    Wet for days/weeks allows bacteria build up of...

    Wet for days/weeks allows bacteria build up of significance. Wet for a 6 hours with water flowing to a drain is acceptable.
    RegardsTB
  26. Replies
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    1,311

    It takes a long term wet spot to grow bacteria. ...

    It takes a long term wet spot to grow bacteria. Heat pumps reload the wet spot during the defrost cycle. Certain bacteria have a very distinct odor when being heated.
    Get rid of the wet spot, end...
  27. Your moisture content is uniform because moisture...

    Your moisture content is uniform because moisture moves quickly through space. The temperature of the window surface and the %RH is the variable. At the surface of the glass condensation, the %RH...
  28. Replies
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    369

    With outside air at 450 PPM CO2, 700-800 ppm CO2...

    With outside air at 450 PPM CO2, 700-800 ppm CO2 inside indicates about 30-40 cfm of fresh air per occupant.
    Regards TB
  29. Replies
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    1,311

    I find that spots in the coil/supply that are wet...

    I find that spots in the coil/supply that are wet for days can grow certain bacteria that when heated have this odor. Drain pans and contact areas that stay wet are the main culprit. I have had luck...
  30. Replies
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    Outside air is 400- 450 ppm CO2. Open the...

    Outside air is 400- 450 ppm CO2.
    Open the doors to the outside or take your meter outside. Some meters are affected by high temperatures.
    REgards TB
  31. Condensation on the windows is a sign that you at...

    Condensation on the windows is a sign that you at the max humidity you can handle.
    There is no logic in your assumption.
    Keep us posted.
    Regards TB
  32. Get you blower on 24/7 to max the amount of...

    Get you blower on 24/7 to max the amount of humidity in the air. 30%RH is near max to avoid condensation on windows and in walls.
    Blower on higher will get more moisture from humidifiers.
    Keep us...
  33. My greatest concern has to do with the...

    My greatest concern has to do with the installation. My GC had never received a request for whole home RH control. What questions should we ask the a/c contractors to make sure they know what they...
  34. Tighten up the structure, get 1.5 ton, and add a...

    Tighten up the structure, get 1.5 ton, and add a small whole house ventilating dehumidifier for best indoor air quality and perfect temp/%RH in the space. A fresh air change in 4-5 hours is...
  35. Any a/c contractor can purchase the Ultra-Aire...

    Any a/c contractor can purchase the Ultra-Aire whole dehumidifier from the factory or local wholesaler.
    All three of the mfgrs. mention are reliable.
    The Ultra-Aire is pioneer of whole house...
  36. sorry double post.

    sorry double post.
  37. Replies
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    587

    Keep your hands off of it, The GS is smarter than...

    Keep your hands off of it, The GS is smarter than you.
    They are marvels and require the best techs that money can buy.
    Regards TB
  38. Replies
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    Sorry, disregard my post. I was trying to...

    Sorry, disregard my post. I was trying to clearify the meaning of the blower door test.
    Regards TB
  39. Replies
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    344

    To clearify the leakage numbers, 2700 @ 50Pa....

    To clearify the leakage numbers, 2700 @ 50Pa. equates to 2700/20 for natural leakage on an average winter day temp/wind. This is 130 cfm which is on the high side and the space would benefit from...
  40. Critical issues are to get the temp/%RH...

    Critical issues are to get the temp/%RH throughout the home during all 95% of the weather.
    A small gas furnace, a simple mid SEER a/c, and a whole house ventilating dehumidifier will be the future....
  41. The carrier greenspeed is a 3 speed based on the...

    The carrier greenspeed is a 3 speed based on the monitoring that I have done. Expensive and engineering marvels are my comments. They do a better job of attempting humidity control verses the single...
  42. Thread: Need HRV ??

    by teddy bear
    Replies
    6
    Views
    438

    Let me give you a little insight into what you...

    Let me give you a little insight into what you need.
    You need a fresh air change when the home is occupied. This is about 80 cfm with a 2,000 sqft. home. You need a home air tight enough to not...
  43. Thread: Need HRV ??

    by teddy bear
    Replies
    6
    Views
    438

    It is complicated. You need make-up air for the...

    It is complicated. You need make-up air for the exhaust devices. An HRV exhaust as much air as it brings in and does nothing for kitchen hood or the clothes drier. If the home is occupied 24/7,...
  44. Thread: Need HRV ??

    by teddy bear
    Replies
    6
    Views
    438

    Homes respond to all the pressures we put the...

    Homes respond to all the pressures we put the surfaces of the home under. On a calm summer day, there is little pressure on the home and very little air enters or leaves unless we operate a fan.
    On...
  45. Replies
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    Fresh air ventilation? Regards TB

    Fresh air ventilation?
    Regards TB
  46. Thread: Need HRV ??

    by teddy bear
    Replies
    6
    Views
    438

    Where in God's green grass earth is this home?...

    Where in God's green grass earth is this home? Tell us about the kitchen hood cfm exhaust.

    Regards TB
  47. Replies
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    I do not have the phone number. Justin does, 800...

    I do not have the phone number. Justin does, 800 533 7533, ext. 0 ask for Justin.
  48. Replies
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    237

    When you manually override the DEH 3000 control...

    When you manually override the DEH 3000 control it will hold that setting until your next night or day schedule change.



    Example: if my schedule is setup for 30 30 during my morning schedule...
  49. Replies
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    504

    I did not see the drawing until now. This will...

    I did not see the drawing until now. This will work. The room with supply side of the dehu will be warmer by 3-4^F. Usually this desired as most basements are cool. Warming also decreases the...
  50. Replies
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    504

    Ultra-Aire is the remote control with duct...

    Ultra-Aire is the remote control with duct collars model. The Santa Fe is the do it yourself version. The Ultra-Aire is the first class unit with vent control, DEH3000. You may not need the remote...
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