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  1. Replies
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    It depends. If it's a hot second floor and cooler...

    It depends. If it's a hot second floor and cooler outside you want to blow the heat out, but need cool air to replace it. You could do that with another fan blowing in on the cooler first floor or...
  2. Insulation can be blown into the walls if you...

    Insulation can be blown into the walls if you really want that plaster. I would have to disagree about not doing the walls. If your going to spend that much on the top and bottom go all the way.
  3. And, since you are already involved in a major...

    And, since you are already involved in a major renovation here why wouldn't you want to insulate it?
  4. There are arguments about it, but I'm in NH, did...

    There are arguments about it, but I'm in NH, did it 8 years ago, air seal first, no problems.
    No ice dams anymore.
  5. What do you mean by blowing down the stack? Are...

    What do you mean by blowing down the stack? Are you saying the chimney?
    You posted this while I was replying.
  6. What you are describing sounds like a combination...

    What you are describing sounds like a combination of duct leakage and a poorly insulated/sealed crawlspace.
    It may be more evident now due to unusual cold. There may also be a fresh air intake...
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    This is from another thread started by someone...

    This is from another thread started by someone trying to avoid breaking the rules. I don't know but it seems credible. If it is termite turds they may be inside the return if panned also, might be...
  8. Replies
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    Unrelated but tell me that condensate drain...

    Unrelated but tell me that condensate drain doesn't go into the water heater pan! I can't see the corner but it sure looks funny!
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    Since it is all electric it has to be an outside...

    Since it is all electric it has to be an outside source or as they said someone using some sort of heater. Kerosene does smell like diesel.
    Do any of your neighbors warm up a diesel vehicle outside?
  10. That makes more sense. I'm not familiar with...

    That makes more sense.
    I'm not familiar with equipment numbers, I deal with the whole building. Those bathroom fans do need to be vented to outside but will wait for further comment on your outdoor...
  11. How big is this house? If what you said here is...

    How big is this house? If what you said here is true you have 209 tons????
  12. I think you may be confusing the supply and...

    I think you may be confusing the supply and return terms. When the unit is running air would come out the supplies in the house and go into the returns.
    That said it sounds like you have return duct...
  13. Replies
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    Go to walmart, home depot, lowes or any hardware...

    Go to walmart, home depot, lowes or any hardware store and you will find a tool to measure it.
    Any condensation issue rotates around RH and until you know what it is this is a guessing game.
  14. Replies
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    X2, but still waiting to hear what the indoor RH...

    X2, but still waiting to hear what the indoor RH is.
  15. Replies
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    That is the cause of the problem. Think about...

    That is the cause of the problem.
    Think about it, it didn't do it for 17 years, why now?
    It's most likely because it is colder in the attic than it was before and the ducts are no better insulated...
  16. Replies
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    So, after 17 years of not having this problem...

    So, after 17 years of not having this problem what has changed?
  17. Replies
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    I'm so disgusted reading the news about the...

    I'm so disgusted reading the news about the "protests".
    We need to fight back, I want to make shirts that say "Obey the law!"
  18. Replies
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    I'm not sure where you are coming from here. We...

    I'm not sure where you are coming from here. We do not know what the RH is so I don't understand how you can say "it is not too wet" and of course better insulating the ducts would prevent it.
  19. Replies
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    Personally I would not consider that a solution....

    Personally I would not consider that a solution.
    What is the indoor humidity and can you post some pictures?
  20. Replies
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    Indoor humidity?

    Indoor humidity?
  21. It's hard to say without seeing the layout....

    It's hard to say without seeing the layout. Without seeing it I would probably just go with undercutting the doors and see how it works, you could add jump ducts between rooms later if needed.
    If...
  22. Replies
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    Did they cover the ductwork with the blown...

    Did they cover the ductwork with the blown insulation?
    I also think a duct may have been damaged but also think that the attic is now colder and room warmer than it used to be.
    What is the temp and...
  23. While it's not ideal it's not uncommon. Undercut...

    While it's not ideal it's not uncommon. Undercut doors and vents between areas should get the job done.
  24. Replies
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    It sounds like you ran into a multi wire circuit,...

    It sounds like you ran into a multi wire circuit, meaning two circuits shared that neutral. There was probably a black and red wire in that box. If so you sent 240v to your furnace and need some...
  25. Replies
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    What I meant was a passive air intake. They are...

    What I meant was a passive air intake. They are like a backwards dryer vent and allow air in as needed to keep pressure in the house neutral.
    A typical 1978 built without tightness being the goal is...
  26. Google this, "latent heat of vaporization" ...

    Google this, "latent heat of vaporization"

    It's not easy to explain and no, you can't do anything about it unless you can change the laws of thermodynamics.

    If you figure out a way let's talk.
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    A blower door test is really the only way to find...

    A blower door test is really the only way to find out if you need it or not. If you don't know how tight the house is you don't know how much fresh air to add. You didn't give any detail about the...
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    Funny video clip by the way! I don't think I saw...

    Funny video clip by the way! I don't think I saw that movie, have to watch it now.
    The part about moving all the furniture out to bring in chairs is a pretty funny comparison!
  29. Replies
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    We aren't supposed to discuss prices here but...

    We aren't supposed to discuss prices here but those numbers are in my experience high. Most of the air sealing jackpots usually are found in the attic and basement so I wouldn't be too concerned...
  30. Thread: Exposed Ductwork

    by stvc
    Replies
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    3,022

    I personally have not seen any shrinkage problems...

    I personally have not seen any shrinkage problems either.
    I primarily use the fomo brand, handy foam. It's a bigger can that goes on a gun type dispenser. It's nice because it's more controllable...
  31. Replies
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    I'm not sure what code someone is following buts...

    I'm not sure what code someone is following buts it's not the NEC, if I have a chance later I'll post the articles for you.

    In my opinion those pullout disconnects are junk, even the square d...
  32. Replies
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    On face value without doing the math I would...

    On face value without doing the math I would consider that blower door number to be in need of serious improvement.
    If the auditor did not express that was a reason for low humidity I would have to...
  33. Replies
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    If it is in sight it does not need to be lockable...

    If it is in sight it does not need to be lockable and a breaker is an approved disconnect.
    It's not a bad idea but not required by NEC.
  34. Thread: Exposed Ductwork

    by stvc
    Replies
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    3,022

    OK, you are kidding about boiling the turkey...

    OK, you are kidding about boiling the turkey right?
  35. A picture of the duct from the basement to the...

    A picture of the duct from the basement to the attic would also be helpful.
  36. Is there a fresh air supply from the outside...

    Is there a fresh air supply from the outside connected to the system?
  37. Replies
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    How could it possibly build any positive or...

    How could it possibly build any positive or negative pressure when they are both OUTSIDE.
    If you could change the pressure outside you could change the weather!
  38. Replies
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    Sorry, no suggestions on type. Like I said, not...

    Sorry, no suggestions on type. Like I said, not my area of expertise, just know enough to be dangerous.
    I think his expectations are out of line with reality for a heated deck.
  39. Replies
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    That doesn't sound terrible for a deck! Fans or...

    That doesn't sound terrible for a deck!
    Fans or maybe a register that will deliver higher velocity?
  40. Replies
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    How is it performing? Why did you replace it...

    How is it performing?
    Why did you replace it and is it working better or worse than before?
    I'm not a duct designer but it sounds good to me.
  41. It sounds like the 55 degree duct has some...

    It sounds like the 55 degree duct has some serious leakage. What are the temps. when its running?
  42. Replies
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    I'm assuming there is ductwork in the basement,...

    I'm assuming there is ductwork in the basement, if so you have return air leaks. They need to be sealed and a duct blaster test would confirm this.

    A blower door test is a good idea too.
  43. Replies
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    The piping from the house to the tank probably...

    The piping from the house to the tank probably wasn't tested, but even a fairy small leak should be noticeable above ground. It may be something to look at.

    Hot water can use a lot more than you...
  44. Replies
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    Is the tank underground? How many people living...

    Is the tank underground?
    How many people living there?
    Was the furnace still out of service during the last 8% use?
  45. Thread: Conflicting info

    by stvc
    Replies
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    How is the system working? You didn't really say...

    How is the system working?
    You didn't really say if there were any comfort or performance issues.
  46. Replies
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    Was the system run during construction? That...

    Was the system run during construction?
    That looks like sheetrock dust to me.
  47. Replies
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    No. If you have no humidifier it doesn't use any...

    No. If you have no humidifier it doesn't use any water!
    Leaking toilet?
  48. I have installed dozens of them, including at my...

    I have installed dozens of them, including at my own house. Never a complaint. For the most part I would describe the sound moving air with a very slight motor sound. I don't think I have ever seen a...
  49. Like teddy said it is typical. The ground temp....

    Like teddy said it is typical. The ground temp. is around 55f. so with no conditioning that is where you will end up.

    My own home has no AC in the basement and is the coldest area of the house on...
  50. Great data in your graph Mark!

    Great data in your graph Mark!
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