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  1. what does HE or LE mean? can't find acrynymn...

    what does HE or LE mean? can't find acrynymn meaning
    http://www.abraxasenergy.com/energy-resources/toolbox/hvac-acronyms/
  2. what's the major cause of rust on a heat exchanger?

    what's the major cause of rust on a heat exchanger in a natural gas furnace?

    just curious?
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    I bet the thing that pisses you guys off the most...

    I bet the thing that pisses you guys off the most is I fixed this problem by actually narrowing down the issues, instead of the typical replace and hope stragtegy. Problem was fixed the first day the...
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    there is one thing bullies hate more than...

    there is one thing bullies hate more than anything , being ignored.
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    don't you "pros" have something better to do ? a...

    don't you "pros" have something better to do ?
    a real pro does not call other people names.
    a real forum doesn't allow such rude behavior, moderators?
    thank god for ignore feature!...
  6. to everyone that called me a dumb ass, stupid and...

    to everyone that called me a dumb ass, stupid and other childish names, made up lies like i burned my hands, made insinuations like I by passed safety devices and other basically mean spirted and...
  7. Yes it has a little bit of duct linear on the...

    Yes it has a little bit of duct linear on the inside, thanks for advice
    I'm off to buy some rockwool insulation
  8. how much effciency is lost in a 30 year old Lennox packaged furnace over time?

    gcs16r-411-100-30 packaged outside furnace and air conditioner combo unit. made by lennox
    approximately 30 years old
    blower motor was replaced about 6 years ago
    ignition control box was replaced...
  9. i actually live outside charlotte in the country....

    i actually live outside charlotte in the country. seems to me ultrasonic produces finer mist than spray and just curious why I dont' see any ultrasonic injectors, only spray?
  10. Can't find whole house ultrasonic humidifier heat pump system charlotte, NC 4000sqf

    My skin and throat become very dry in the winter. I've read the past posts on sealing up the home. The home is weather sealed fairly well, was built about 8 years ago charlotte, nc, and has a 2 zone...
  11. thanks for the advice, i guess what i'm really...

    thanks for the advice, i guess what i'm really curious about is why some companies recommend insulating the dirt floor and others don't? Also when the plastic is sealed against the brick crawl space...
  12. the inside and outside dirt depth are...

    the inside and outside dirt depth are approximately the same, climate is North carolina, and it's a dirt floor.
  13. insulate crawl space walls only and if so how deep under the dirt do I dig?

    I read the article below:
    http://www.advancedenergy.org/portal/crawl_spaces/pdfs/Home%20Energy%20January%202005_low%20res2.pdf
    this is a photo of our crawl space in Gastonia North carolina....
  14. " Early adopters will need to be significantly...

    "
    Early adopters will need to be significantly involved in the process to insure quality, probably having to lead the contractors until these strategies and best practices for implementation trickle...
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    I've been travelling a lot. and I have seen tons...

    I've been travelling a lot. and I have seen tons of mini split ac units all over the place all the hotels use them a lot of houses have one or two rooms with a minisplit, but the whole house is not...
  16. you can reach me at 704909 6678 or email...

    you can reach me at 704909 6678 or email superduperenergydude at gmmmmailll.com (obviously mispelled email domain to avoid spam bots)
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    hvac in a 3rd world country.

    So I'm visiting Vietnam. I'm staying at a 2 story home made entirely of brick with stucco over the outside.
    IN the evening just touching the wall facing the settng sun feels like it is 20F hotter....
  18. it's not a zoned system. I might replace the...

    it's not a zoned system.

    I might replace the flex with sheet metal tube before it gets mudded up.
  19. does flex duct in closet need to be covered with drywall? How far from furnace.

    I have two questions:

    I am having my duct work moved inside conditioned space. The bedroom lines are being moved inside a closet ceiling. Does this flexduct need to be covered with drywall and...
  20. I've seen fur downs with no duct & problem was...

    I've seen fur downs with no duct & problem was leakage to attic.

    So in this situation they had 2x4's with drywalls acting as the duct work? Common sense tells me drywall is not a good material for...
  21. THANKS! you are absolutely right, I cannot...

    THANKS! you are absolutely right, I cannot believe how many kinks there are in the entire system, especially off the air handler header.

    Who ever did this system should be ashamed IMHO.
  22. bathroom ceiling

    this last photo is of bathroom.
    I used a panoramic cell phone that is why the framing looks so bowed out. IN real life it is straight. 317031
  23. Here are some photos of the main trunk being...

    Here are some photos of the main trunk being furred down with framing. The left hand side, has a boxy room sticking out. Ontop of that is the old distribution box which will feed the bathroom beneath...
  24. "Are you beginning to see, if you want to...

    "Are you beginning to see, if you want to approach attic temperature control with quality of thought, that there is little room for easy, slap-it-up-there solutions? "

    none of my questions involve...
  25. Ok, that makes sense, are there any studies out...

    Ok, that makes sense, are there any studies out there that show how much better foam is than fiberglass bats? If it is 3x the cost but only 20% more efficient, the return on investment might be very...
  26. Obviously it is less expensibe up front do u have...

    Obviously it is less expensibe up front do u have any studies proving your point?
  27. Spray foaming attic roofline vs using Batt insulation on roof line?

    In all the energy effciency threads on this board. I always see the recommendation of using spray foam to seal the attic envelope. Why isn't batt insulation ever recommended? It is of course less R...
  28. your advice is misguided I started this thread...

    your advice is misguided I started this thread and am not breaking any forum rules that I am aware of.
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    nope dont' have time to travel down there. and...

    nope dont' have time to travel down there.
    and actually I did start this thread, but the moderator broke it off into a seperate thread.
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    I got a reasonable quote from a company that...

    I got a reasonable quote from a company that would just bring out a couple of disposable foam tanks 50 pounds each, no need for a whole truck!
  31. "I'd be interested in how they come up with that...

    "I'd be interested in how they come up with that one. Anyway how could you prove that 11%rate? "

    Just read the link in the original post. They did a study over several months on a mock up home.
    ...
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    Just for clarification the study recommended...

    Just for clarification the study recommended foaming ducts to increase R value/insulation value allowing ducts to be burried in loose fill insulation and prevent condensation in humid environments. ....
  33. Will painting home's walls really give me 11% decreased energy bill?

    http://www.ba-pirc.org/media/pdf/ReflectiveWalls_DParker.pdf
    This study seems to say painting them white will do so.
    If you live in Florida and your AC energy bill is $2400 a year than that is...
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    I think the original poster is talking about flex...

    I think the original poster is talking about flex duct? since the duct is the insulation you really can't rip it off.
  35. Tedd kidd, I understand your approach, but this...

    Tedd kidd, I understand your approach, but this design problem is in such an obvious need of improvement, it makes my skin crawl just knowing she bought a house with ducts in the attic and pays...
  36. thanks again for the responses, I think foaming...

    thanks again for the responses, I think foaming the whole roof deck is beyond her budget.
  37. 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....
  38. " Might be interesting to see insulating flex...

    " Might be interesting to see insulating flex modeled."


    What does that mean exactly?

    "Spray foam on flex is like putting a diamond ring on an old bar whore.:"

    Why do you say this?...
  39. duplicate post

    duplicate post
  40. "I don't think you'd want them attempting to coat...

    "I don't think you'd want them attempting to coat flex duct. ....... Really tough, and in the end what have you done?"

    Is that a rhetorical question? You've increased the R value with a closed...
  41. OK hypothetically I hire you to do a home energy...

    OK hypothetically I hire you to do a home energy effciency audit, pay a few hundred and.........

    would you ever recommend spray foaming attic flex duct as a solution?

    I'm asking because after...
  42. sorry dont' have an extra $10,000 lying around....

    sorry dont' have an extra $10,000 lying around. and you know as well as me that putting a condensor unit in the attic is insane.
  43. I'm not sure why an energy audit is being...

    I'm not sure why an energy audit is being suggested, when this is an obvious problem that energy audits don't even address because putting the duct work in attics is the construction standard.
    ...
  44. just slit it several times with a box cutter,...

    just slit it several times with a box cutter, pretty easy to do.
  45. After reading the following links the only...

    After reading the following links the only plausable solution to the humidty issue was to add insulation and then wrap in a new vapor barrier like astro foil.
    ...
  46. "Unfortunately, the action you want to take has a...

    "Unfortunately, the action you want to take has a lot of risk. "

    No it doesn't, worst case scenario, humidity is trapped and I'll blow $20 on insulation during a test.

    According to this article...
  47. advice

    So basically what you are saying is that if I get condensation I should NOT wrap the ducts with insulation, but if I DON"T get condensation it is OK.

    So If I just spend $20 and get some insulation...
  48. " Sales pitches selling products that promise...

    " Sales pitches selling products that promise solutions, without accountability for results are a sucker trap. Don't fall for them."

    Where did this come from?!? Sorry there aren't any insulation...
  49. Why? Does she have a problem she's hoping to...

    Why?
    Does she have a problem she's hoping to cure? Or "hey, this seems like a great idea and I've got money to throw at stuff."?

    Yes her problem is that her electrical bill is high due mostly to...
  50. flex duct hung from attic ceilings vs. laid on attic floors?

    My home has the attic flex duct laying on the floor of the attic in North Carolina,

    My sisters home in Orlando, FL has it suspended from the ceiling.
    She's thinking of burying the flex duct under...
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