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Type: Posts; User: Shophound

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    Good to know. Thanks.

    Good to know. Thanks.
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    Cherokee, forgive me if this has been asked...

    Cherokee, forgive me if this has been asked already, but have you had a duct blaster test done? It would give you a baseline for before and after your Aeroseal project.
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    With the thermostat sensing from the upstairs...

    With the thermostat sensing from the upstairs location, and with the downstairs return grill 90% covered, the upstairs return air grill could actually draw near its nominal inflow, resulting in...
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    A pdf file I found that neatly illustrates stack...

    A pdf file I found that neatly illustrates stack effect and reverse stack effect:

    www.finehomebuilding.com/PDF/Free/021213016.pdf
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    Leave it to Dr. Joe to already have something...

    Leave it to Dr. Joe to already have something written about this:

    http://www.buildingscience.com/documents/digests/bsd-150-black-stains-on-carpets-and-ghosting-of-framing?searchterm=brownian
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    Sealing air ducts can increase CFM delivered to...

    Sealing air ducts can increase CFM delivered to each room. However, marginal to poor ductwork, when sealed, might actually increase static pressure the blower must work against.

    ASHRAE standard...
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    Cherokee states he had misplaced his audit report...

    Cherokee states he had misplaced his audit report and then got a fresh copy from his auditor. This likely refreshed his mind as to what the auditor found out (such as the upstairs leakage at the sole...
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    If the previous "before" scenario was a five hour...

    If the previous "before" scenario was a five hour recovery with the downstairs thermostat sensing and the downstairs return air grill uncovered, an extra ten minutes with a return to this condition...
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    Perhaps Cherokee need not run another test. What...

    Perhaps Cherokee need not run another test. What I need clarification on is if this is what we're talking about:


    Downstairs return uncovered, thermostat fed info from upstairs sensor only,...
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    More like covering 90% of the downstairs return...

    More like covering 90% of the downstairs return made the upstairs return on the same chase more effective. It results in more complete turnover of the air volume on the second floor. While I've spent...
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    If what you've described above is the actual...

    If what you've described above is the actual sequence of events, what I placed in bold above makes sense. I admit I'm a bit confused by these details, as up until now my focus was on muddling through...
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    I find it cool that my colleagues here are...

    I find it cool that my colleagues here are getting as much brain exercise on this subject as I am. And that I'm not the only one in the world who wakes up thinking about stuff like this and has an...
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    Your white carpet soiling along the upstairs...

    Your white carpet soiling along the upstairs baseboards is your tell-tale indicator here where a large quantity of your upstairs infiltration is taking place, as you well know. I thought it was worth...
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    Thanks, Tips. That helps to bolster my theory vs....

    Thanks, Tips. That helps to bolster my theory vs. weaken it. Love it when that happens! :D
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    Cherokee can correct me if I'm wrong, but...

    Cherokee can correct me if I'm wrong, but somewhere in this thread I thought I read he started using a remote thermostat sensor upstairs, either in his master bedroom or somewhere else upstairs, at...
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    I'm still mulling over the details of of why when...

    I'm still mulling over the details of of why when the upstairs return was open and the downstairs 90% closed that the upstairs rooms became more comfortable. Suffice it to say that a successful air...
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    You're gaining on it!! :) Thank you for...

    You're gaining on it!! :)

    Thank you for telling us about this. It will help me form my replies in the other thread you started with sharper focus. Since you started the post I feel comfortable...
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    Okay, no problem. I can see how the fingers can...

    Okay, no problem. I can see how the fingers can slip by that essential "n" when typing a post. :)

    I have an idea, since this post has become quite lengthy. Start a new thread, and ask a question...
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    I don't understand why you'd want pros to remain...

    I don't understand why you'd want pros to remain out of that thread, were it to be started by a guest. Was that a type-o or miswording?
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    I'm going to address the high/low return matter...

    I'm going to address the high/low return matter when I get back to my bullet point mode of posting. On one hand, Xavier and Brian may like where I go with it (not that such is my motivation...only...
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    Please be patient; I'm going somewhere with this....

    Please be patient; I'm going somewhere with this. I'll get there eventually.
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    Picking up where I left off: Mentioned...

    Picking up where I left off:



    Mentioned earlier was one driver behind hot air in an attic migrating indoors, that being the expanding mass of heated air. Other drivers would be a temperature...
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    Understanding the physics of it describes my...

    Understanding the physics of it describes my interest in this thread. I have this stubborn notion that if the physics can be understood, it will lead to further notions of how to better manage an...
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    To be honest, after posting my latest stuff I...

    To be honest, after posting my latest stuff I went back and waded through this thick thread and I realized I've probably asked him questions either asked previously or stated by him and/or others....
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    Thank you for your kind words. Now, let's see...

    Thank you for your kind words.

    Now, let's see if I have a decent vision of your domicile disposition in my mind:



    Furnace and cooling coil is in basement. Both serve all levels of the...
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    This dovetails into our building science...

    This dovetails into our building science discussion I mentioned to you earlier. What I've learned from trying to study complex matters like this is one can have a few "ah ha!" moments of discovery,...
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    Cherokee, IIRC in an earlier post you stated that...

    Cherokee, IIRC in an earlier post you stated that your large return on the first floor is in common with the large return on the second floor (going by your photos...I'm calling "large" the square...
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    We have been discussing the low and high return...

    We have been discussing the low and high return scenario in a pro section of this forum as it pertains to what building science geeks call "stack effect". With what we've discussed, I think I have a...
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    According to wunderground.com, the dew point in...

    According to wunderground.com, the dew point in Baltimore right now is at 82^F:

    http://www.wunderground.com/cgi-bin/findweather/getForecast?query=zmw:21201.1.99999
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