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    An update on the ductwork. I hired a P.E. who...

    An update on the ductwork.

    I hired a P.E. who does not do HVAC work to evaluate the condition of the ducts. Bottom line is that the ductwork in this new house is worse than I thought. There is...
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    I want to thank everyone who's replied on this...

    I want to thank everyone who's replied on this thread. Just putting my issues down in writing has actually helped.

    I'm focused on fixing the system so it works the way I wanted from the start.
    ...
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    Before you all think I'm some kind of schnook,...

    Before you all think I'm some kind of schnook, there was a lot that went right with this deal for me and my family. The HVAC system just wasn't one of those things. I was also very pressed for time...
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    This is not a tract home, it's a close to...

    This is not a tract home, it's a close to seven-figure semi-custom.

    I was required to work directly with the HVAC contractor, although he didn't work FOR me--he worked for the builder. In the end...
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    Beenthere, you're just up the road. Know anyone...

    Beenthere, you're just up the road. Know anyone good in West Chester, or do you care to drive over sometime?
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    My question on aero sealing of return ducts is,...

    My question on aero sealing of return ducts is, how do you keep the material out of the blower? Do you have to disassemble the ducts enough so that you can use a different fan to depressurize the...
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    Seems to be a professional difference of opinion...

    Seems to be a professional difference of opinion on this point.

    I'm not an engineer but I think I have a basic understanding of fluid flow. If I were building the return drop in its present...
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    New construction, finished in August 2012. Using...

    New construction, finished in August 2012. Using building cavities as ducts is anyway contrary to the best practices in the EPA's Indoor airPLUS Construction Specifications. This is not a...
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    It ought to be against code, that's for sure. I...

    It ought to be against code, that's for sure. I think it's permitted in my part of Pennsylvania, but I'll find out for sure. I was dismayed when I saw what they'd done but as I explained earlier, I...
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    I'm asking these questions because I'm genuinely...

    I'm asking these questions because I'm genuinely interested in your opinions. So I appreciate all responses.

    To help with your assessment of the ductwork, I'm sure pictures are always helpful. The...
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    You might have also noticed the large sheet metal...

    You might have also noticed the large sheet metal patch just above the filter box. That patch is my work too. That was the installer's idea of where to put the single return for the basement (zone...
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    "The return drop could be better." That was...

    "The return drop could be better."

    That was part of my point: the trunk is 28" wide, and the drop is 14X25 (turned so that the drop is 14 inches mated to the trunk's 28 inch dimension).

    "What...
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    I see this has gotten a number of views, but no...

    I see this has gotten a number of views, but no takers on a reply. I also took the time to read through some other posts, and I get that most professionals on here are occupied with running a...
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    Return duct and filter box

    The attached pictures are of the community return duct and filter box, installed in a new house last August.

    The filter box is 20X25, and I use 5" MERV 16 filters.

    From an airflow perspective,...
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    Because if it is, then I'm looking at replacing...

    Because if it is, then I'm looking at replacing the condenser/coil unit, the three thermostats, and the zone controller, at least. All of these items were new last August, but that's how it goes with...
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    Last year I read a book called Residential Duct...

    Last year I read a book called Residential Duct Diagnostics and Repair by Tom Butcher. Got it on Kindle--I thought it had some good information in an accessible format.
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    This is the Ask Our Pro's forum. In order to post...

    This is the Ask Our Pro's forum. In order to post a response here, you must have verified qualifications and have been approved by the AOP Committee. You may ask a question by starting a new thread....
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    Sorry, in rereading my post, I see that I forgot...

    Sorry, in rereading my post, I see that I forgot to mention that I'd be interested in having manual J and D calculations done. There's no evidence that the were ever performed, and I'd be interested...
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    I'm in West Chester PA. I have the following...

    I'm in West Chester PA.

    I have the following Lennox equipment:

    XC16-048
    EL296UH090XV48C
    Harmony III, three dampers, three zones, one per floor (basement is conditioned space with its own...
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    Thanks. Sorry for any breach of protocol....

    Thanks. Sorry for any breach of protocol. Hopefully this'll get his attention.
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    Need help with a zoned system

    ADillon--I see you're a professional member in my area. I've got a new house, built with Lennox HVAC components (three zones) which could use some sorting. Can you tell me the name of your company or...
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    Okay, thanks for that information. It was my...

    Okay, thanks for that information.

    It was my goal to condition my house (two story plus basement) with three zones, one per floor. And to do this using a single condenser, coil, and furnace/air...
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    Communicating equipment

    I haven't seen a manufacturer definition of "communicating." My understanding is that it basically implies widely variable modes of heating/cooling/air delivery along with dedicated modes of data...
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