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  1. Replies
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    Picture this. If you took a plastic bag,say a...

    Picture this. If you took a plastic bag,say a kitchen trash bag. If you put it in a 12 inch round duct and then fill the bag with just enough air that the bag fills the duct. Now push the bag through...
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    Best prices to start and a discount. Thanks!!

    Best prices to start and a discount. Thanks!!
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    Wow. you need to start learning your trade. ...

    Wow. you need to start learning your trade.

    you could start here

    https://www.youtube.com/watch?v=ybwiG-OcKoQ#t=16
  4. Replies
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    1,227

    What was your measured air flow?

    What was your measured air flow?
  5. As per kdean1. Did he measure air flow? No...

    As per kdean1.
    Did he measure air flow? No reason to add refrigerant if he didnt measure air flow
  6. what is it? 3000 CFM of combustion air,1400 degree stack temp

    What is it ?

    3000 CFM of combustion air
    1400 degree stack temp
    44 Amp igniter
    stoichio metric 1.7:1 air/fuel mixture


    I thought this was fascinating.
  7. Thread: Geothermal

    by tlj000
    Replies
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    286

    Your question is extremley vague. To size a...

    Your question is extremley vague. To size a system correctly someone would need location, orientation, construction details, glazing details among other things.
    Although some people in my area say ...
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    Ask for a copy of the load calcs and compare the...

    Ask for a copy of the load calcs and compare the entries. All of the house details you stated should match
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    35 feet of 4 inch flex duct installed by an...

    35 feet of 4 inch flex duct installed by an electrician. I suspect a fan that makes noise but doesn't move air
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    1,881

    Take a look at the attached bid comparison sheet

    Take a look at the attached bid comparison sheet
  11. Replies
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    1,881

    Keep in mind duct work and the amout of air...

    Keep in mind duct work and the amout of air flowing through it plays a large roll in capacity. Just because the name plate on your current system says its 3 ton, doesn't mean its delivering 3 tons....
  12. That makes alot of sense. Is there any...

    That makes alot of sense. Is there any documentation that you know of on this. I know a guy who likes to use shared returns, it just doesn't seem right to me. He argues that it fine.
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    2,881

    He is a real believer in "Sometimes you have to...

    He is a real believer in "Sometimes you have to make do with what you have"
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    The space between the bottom of the AH and the...

    The space between the bottom of the AH and the return is used for noise control and humidification
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    As others have said, forget about any equipment...

    As others have said, forget about any equipment changes or upgades until you have your building enclosure and duct work in order.
    Don't let geothermal even cross you mind again. At this point that...
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    Yea the Chinese manufacturers had a huge number...

    Yea the Chinese manufacturers had a huge number of booths.
    Who knew there were 25 - 30 different brands of ductless splits. (At least brand names, who knows who makes them)
  17. Replies
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    Jack Rise does a better job explaining than I...

    Jack Rise does a better job explaining than I can. Read this from an earlier post.

    http://acinewyork.org/sites/default/files/session/82728/ny12hvac2risejack.pdf
  18. Replies
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    When you calculate your friction rate and the...

    When you calculate your friction rate and the result is something other than .1. You will need those other numbers.
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    [/COLOR] No your not using the ductulator...

    [/COLOR]

    No your not using the ductulator right. You can't pick a random friction rate. you need to calculate it based on the total equivalent length of your run.
    The duculator does not know if...
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    Download this pdf file ...

    Download this pdf file

    http://acinewyork.org/sites/default/files/session/82728/ny12hvac2risejack.pdf
  21. Replies
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    I don't believe you will find an option for .10...

    I don't believe you will find an option for .10 static pressure on your ductulator. what your likely looking at is friction rate.
    Friction rate is calculated not picked, based on the total...
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    Agreed. Forget about how to heat and cool. Until...

    Agreed. Forget about how to heat and cool. Until you know how much you need to heat and cool.
  23. "air conditioning isn't necessary" If you don't...

    "air conditioning isn't necessary"
    If you don't need AC why go with forced hot air, are the electric rates in your area really cheap?

    I'd go for a Hydronic system and lots of insulation.
  24. Example of why its not a good idea. A piece of...

    Example of why its not a good idea.
    A piece of copper pipe at room temp.
    I cleaned the top part of the pipe and left the bottom as I found it.

    Which temperature would you pick?

    398831
    398821
  25. Thread: Hvac buddy

    by tlj000
    Replies
    10
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    871

    I can tell you for sure there is not an entry...

    I can tell you for sure there is not an entry labeled "beer can cold" or air flow measurement based how they feel to the hand.

    So that might throw some people off. :grin2:
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