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  1. Replies
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    What's ARPA?

    ?
  2. Replies
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    I don't thing the earth flips upside down...

    I don't thing the earth flips upside down completely. I think what you meant is that the magnetic poles flips.

    The earth will be fine. It's just those damn humans that will suffers.
  3. Replies
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    981

    I think what the article is saying is that - HFC...

    I think what the article is saying is that - HFC is good for the ozone but is turning out to be bad for global warming.

    Weather you agree or not, they are looking for a replacement to HFC.
  4. Replies
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    2,603

    Check out your Community College. I went to...

    Check out your Community College. I went to Northern Va Comm College. Got a lot of bang for my buck.
  5. Replies
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    1,398

    As far as checking the high side... I didn't.

    As far as checking the high side... I didn't.
  6. Replies
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    1,398

    I'm not a full time tech but I just started up a...

    I'm not a full time tech but I just started up a mini split for a co-worker (we do commercial hvac controls, computer stuff half the time)

    First time I've ever put my gauges on it. Suction pulled...
  7. tankless water heater (electric): capacity control

    At max capacity, a certain gpm will give you a certain temp rise, but you don't need the same capacity all the time. How does the tankless control for demand that is less than 100%?

    You can...
  8. OK. You probally know something that the Tridium...

    OK. You probally know something that the Tridium instructor couldn't/wouldn't tell me.
  9. As far as I know, there is no back door.

    As far as I know, there is no back door.
  10. I'm surprised no one responded. Talon is...

    I'm surprised no one responded. Talon is Tridium. Tridium designed their product so that the original dealer/contractor can lock any future contractor out. Tridium's point of view is that, if a...
  11. Replies
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    740

    The graphics files are *.bmp and *.val You need...

    The graphics files are *.bmp and *.val
    You need both.
    Copy them from your PC to your laptop using windows explorer.
    You need to put them in the working path/directories for the graphics in MS1800...
  12. Replies
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    1,736

    The VAVs that I see usually have some kind of air...

    The VAVs that I see usually have some kind of air flow sensor.
  13. "improper flame" (tough trouble shoot) HELP

    Got a Goodman (I know it sucks) 80+.

    Heating sequence works fine but about 10 seconds into main ignition, we lose 24v to the gas valve. About 30 seconds later, sequence would start over again...
  14. Dudes; try this unoffical fix. It worked for my...

    Dudes; try this unoffical fix. It worked for my win2000.

    http://www.intelliadmin.com/Daylight%20Saving%20Fix%20Download.asp
  15. Thanks, but it doesn't look like a file I can...

    Thanks,

    but it doesn't look like a file I can just run. It looks like a manual for computer programers. Or am I missing something here?
  16. recording/trending/logging dry-contacts

    Looking for a cheap way to have a historical record of when a unit starts and stops. I'm thinking someone probally have an idea for a home-made one. Maybe involving a time clock and a current...
  17. Replies
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    2,682

    Survey, who do you distrust?

    This is a survey. I'm trying to get a lot of response and will have to read them all. So just give me SHORT answers please. And be serious.

    Who or what type of people do you distrust?
    Pick no...
  18. Replies
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    4,625

    Well, it seems that half of the athiest say that...

    Well, it seems that half of the athiest say that athiest ARE discriminated against. While the vast majority of Christians say that athiest are NOT discriminated against. I would give more weight to...
  19. Replies
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    4,625

    Another Athiest survey

    Wow. The first athiest survey have turned into a debate about the existence of God.
    That's OK but I will need to start another survey. What I really want to know is: Are athiests the next...
  20. Replies
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    2,717

    Mormon and Buddhism

    Due to all the good responses in my athiest thread, I want to ask the following.
    What do you all think about Mormons?
    What do you think about the teachings of Buddhism?
  21. Replies
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    17,079

    Survey about atheism

    Simple question to all. What is your opinion about atheists?

    Please be serious. Short answers will be appreciated. Please, no sermons or quotes from the bible.
  22. Replies
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    7,451

    Honeywell brought Tridium.

    Honeywell brought Tridium.
  23. Replies
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    977

    I plan to make a wood stove/burner out of a 50...

    I plan to make a wood stove/burner out of a 50 gallon drum. (Unless someone can convice me to do something else with it). Not only that, I was wondering if I can make it a condensing one.
    ...
  24. i'm not sure what this residential hvac site is...

    i'm not sure what this residential hvac site is about. "no diy", "pro have to register", can we all just get along?

    fjcool, there is a diference between 24va and 24vac. a 24va transformer is a...
  25. Went to this townhouse for a no heat call. Found...

    Went to this townhouse for a no heat call. Found gas furnance with a heat pump. Programable t-stat with indoor and outdoor temperature sensor, I think. Heat pump is 1st stage heat. Furnance is...
  26. Replies
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    1,326

    I do controls work around the beltway.

    I do controls work around the beltway.
  27. Replies
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    987

    Every vav connected to the same air handler, work...

    Every vav connected to the same air handler, work together to distribute the air from the AH to the side of the building that need it most. Different side of the building need different capacity as...
  28. Replies
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    That IS smart.

    That IS smart.
  29. Replies
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    1,023

    oops.

    oops.
  30. Replies
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    http://www.washingtonpost.com/wp-dyn/content/artic...

    http://www.washingtonpost.com/wp-dyn/content/article/2006/09/29/AR2006092901529.html?nav=rss_metro/va

    I wonder what the technical explanation for this is? Did power come thru the neutral? Did...
  31. Replies
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    950

    My company truck have only a radio. I want to...

    My company truck have only a radio. I want to play mp3 or mp4 in the truck. What's the cheapest way to do this? I would think the easiest way is to transmit the songs in FM signal to my truck...
  32. This one was the least. ...

    This one was the least.


    http://news.yahoo.com/s/ap/20060904/ap_on_en_tv/obit_irwin
  33. Replies
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    537

    So how does this work? Who decides, or is able...

    So how does this work? Who decides, or is able to close a thread?
  34. Replies
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    Gee, I hope I don't get in trouble for helping. ...

    Gee, I hope I don't get in trouble for helping.

    Max, that's not a bad price for a blower wheel, unless you have lots of time and not a lot of money.
  35. Replies
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    I see. So if one is a former tech and he wishes...

    I see. So if one is a former tech and he wishes not to register his credentials, he can not ask such questions here.
  36. Replies
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    1,290

    It seems that my last tread is closed. ...

    It seems that my last tread is closed. Nevertheless, I owe some of you a response.

    amickracing:
    Thank you. However, could you give me an example of a situation where a 20 deg super heat would...
  37. Replies
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    Operating Condition: AC been running for a...

    Operating Condition:
    AC been running for a while.
    House is cool. Humidity not high.
    Delta T = 17
    Don't know how much CFM.


    Outside: Ambient = 84
    CU discharge air = 104
    Liquid line temp =...
  38. Replies
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    1,643

    Yes, those mini seem to be high tech. But i'm...

    Yes, those mini seem to be high tech. But i'm surprise if they still uses recip compressors.
  39. Replies
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    889

    Some of us don't have any credentials.

    Some of us don't have any credentials.
  40. I have a small house with propane radiant floor...

    I have a small house with propane radiant floor heating, no AC. I am thinking about putting in a mini split.

    Question:
    Should I put in a heat pump? Would running the heat pump on a mild day...
  41. Replies
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    648

    Most HVAC techs refers to it as Controls. But...

    Most HVAC techs refers to it as Controls. But others refer to it as Energy Management.
  42. Replies
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    1,643

    how does R-410a achieve higher efficiency?

    how does R-410a achieve higher efficiency?
  43. I think the installer made a mistake.

    I think the installer made a mistake.
  44. Replies
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    1,892

    seen the Staefa Smart Tool on Ebay for $49

    seen the Staefa Smart Tool on Ebay for $49
  45. Replies
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    833

    I want to see if there is a relationship between...

    I want to see if there is a relationship between body fat/size and body conductivity/resistance.

    Hypothesis:
    The higher your body fat; the higher you electrical resistance.

    I am trying to...
  46. Replies
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    2,616

    In the panel in a house, the neutral is grounded....

    In the panel in a house, the neutral is grounded. What if you don't ground the neutral? Will you get about 55-60 volts to ground on each leg?
  47. Replies
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    572

    http://www.hvac-talk.com/vbb/showthread.php?postid...

    http://www.hvac-talk.com/vbb/showthread.php?postid=983941#post983941
  48. Replies
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    Not a plumber but i'm about the replace my...

    Not a plumber but i'm about the replace my toilet. I have a 40 yr old house and i have one uncertainty. Have the size of the dicharge opening on the new toilet changed since. Or is there only one...
  49. Replies
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    662

    At the moment, I have a VAV DDC controller with...

    At the moment, I have a VAV DDC controller with one bad input. I don't want to throw it away and was wondering what I could use it for personally. Any ideas?
  50. Replies
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    Why do you want to heat hot water? Just kidding....

    Why do you want to heat hot water? Just kidding.

    Knew someone who lived alone and he showered at the same time everyday. So he installed a timer to only heat the water right before he shower.
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