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  1. Thread: Tamarack

    by Xavier
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    284

    Return Air

    Thank you for responding to one of my posting, but, I must make two points. At the time I posted the item tree was an ongoing discussion on how to BEST design and install a forced air system. I...
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    Flow vs Velocity

    CVBees

    In addition to your other issues, an “inline fan” REDUCES flow! ;)
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    Great Calculations Motoguy AKA "SWAG"

    Yes Mr. Bill that is >1,200 sq ft per ton plus the basement!;)
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    What number do you want?

    HVACRDEDIC

    To be accurate:

    In the case of fossil fuels burnt in air, the combustion temperature depends on all of the following:

    • the heating value;
    • the stoichiometric air to fuel ratio...
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    Industrial vs Residential applications

    Hvacrmedic

    I have read a lot about combustion air in the past 35 years, and have read your reference, however it appears that they are addressing “Industrial applications” not residential.

    "...
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    "IAQ" Indoor Air "QUANTITY" (IAQQ)

    Here is the formula I posted on 10/9/11:

    “The chemical equation for burning natural gas is:

    CH4 + 9.52 Air (O2 + N2) = CO2 + H2O + 7.43N2

    (This does not include dilution/secondary air.)
    ...
  7. air volume

    I do not recommend by-pass humidifiers because they reduce air volume to the building by as much as 10%.

    Get a powered one. A little noise but more conditioned air to the living space.:angel:
    ...
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    Chemistry Not Opinions

    The chemical equation for burning natural gas is:

    CH4 + 9.52 Air (O2 + N2) = CO2 + H2O + 7.43N2

    (This does not include dilution/secondary air.)

    X
  9. Replies
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    How many pounds of potatoes can you put in a 2 pound bag

    Cherokee, when you have a minute could you answer my question if there are recessed lights in the second floor that lead to the attic, or if you have a whole house fan?

    On the same line do you...
  10. Replies
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    22,276

    In and Out

    Shophound:“Which I can't discuss unless I consider the entire dynamic of the envelope and HVAC system. Which is what I'm doing. And which I now see in multiple story structures, return air location...
  11. Replies
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    Fact or Fiction

    Lynn I agree with your statements, furthermore not many understand that the dirt gets PUSHED into a “vacuum cleaner!” Until this is understood this discussion will continue for another ten years!
    ...
  12. Replies
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    Path of least resistance

    This post is getting way to deep for me and even my nemesis Carnak.

    I think what you are attempting to explain is called the “Neutral Plane” of a building.

    Second; what you are describing is...
  13. Replies
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    100 degrees F

    Yesterday ambient temperature was 100 degrees F around 4:00 PM. Attic temperature 132 degrees F and in the Sun 114 F.

    My system came on at 4:10 pm and ran continually until 7:25 PM (Confirming my...
  14. Replies
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    22,276

    Do it Right!

    Skizot, Please reread my statement

    Quote:
    Originally Posted by Xavier
    I have stated for years that my HVAC system for my 3,500 sq. ft. two story home in full sun is 48,000 BTU’s for heating...
  15. Replies
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    22,276

    Air in a Bottle!

    First the great news, the part I designed for my Jag works great.

    I also updated the alternator to a new design that I discussed with someone who builds and repairs them (Expert) and “we” came up...
  16. Replies
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    22,276

    HVAC Return Design

    Hi Brian, how have you been?

    Today I am waiting for some custom parts that I designed for my Jag to be done by a tool and die shop, so I checked in on HVAC.

    Thanks for carrying the “torch”...
  17. Do it "ALL" right!

    Hi Robin. I too miss my “nemesis”!

    Can you please explain how changing CFM (besides running longer) on a system with a "TXV" will affect RH.

    You know my position: 2 tons @ >500 CFM's for my...
  18. Replies
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    Stay Cool

    This year’s post is dedicated to my friend and adversary.

    Time to open the upper returns and close the bottom ones.

    I am sure he does not have to switch his returns because I know he has great...
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    Hot/Cold or NONE!

    I use hot water and a clear drain line in my “powered” flow through humidifier with a ball valve to control water flow through.

    Because I have reduced/eliminated uncontrolled air exchanges in my...
  20. Merry Christmas to all.

    Merry Christmas

    I posted this explanation as my early Charismas present hoping this one would be understood and reduce everyone’s energy costs (my Christmas present to all).

    Since no one has...
  21. How airplanes fly

    Xman, you apparently do not understand the effect of wind on Delta P. I guess by now you have heard of a blower door test? Look it up and report back here what the effect of wind against a house is...
  22. Quality not QUANTITY

    Let me address these last two posts.

    First Bob 100% of what I posted was intended to explain how a home works and help the poster. The reference to my site was because I have received several...
  23. Houses DO NOT make air--OPEN A WINDOW

    The correct and only practical answer to your question is “OPEN A WINDOW!”

    For over 30 years I have been explaining how a home works (PHYSICS) including 10 years on this site and it is still not...
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    Down for Winter, Up for Summer

    naiga snruter wol dna hgih ruo hctiws ot emiT.


    Note: It is encouraging to continue to see each year more and more posters understanding how a home works.

    P.S. However, it would be nice...
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    New Technology

    [QUOTE=energy_rater_La;7889511]TB
    the program I work with was until recently administered by state goverment
    I guess it still is, although in part federal goverment has come in also.
    the .35 ach...
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    Quality or Quantity

    First point:

    Ton of air conditioning
    by Robert Fogt (Guest) on 05/09/01 at 18:46:52
    I found this information:
    One ton of capacity equals 12,000 Btu/h

    Second point: are you stating there is...
  27. Replies
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    Physics 101 "How a Vacuum Cleaner & Returns Work!

    Although I have enjoyed reading this long post no one has yet explained why having many returns is better than one and why the location is important.

    Before I explain this we first must all...
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    Opinions VS Data & Experience!

    "Pretty clear in an argument like this who has the practical experience and knowledge of proper air distribution" :confused:

    I agree! ;)

    That is why we call it "AIR MANAGEMENT" :payattention:
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    Humble

    David my advice is you must treat your home as a system and consider/include many factors to have the best “HVAC” system. Send me a note and I will explain what I have learned and offer some...
  30. Replies
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    Hot air Up Cold air Down

    Time of year again for us who have High and Low Adjustable Louvered Returns in every room to close the low ones and open the high ones. Furthermore, if you have as I do, adjustable ones, it is also...
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    Your homes Physics

    “I have always had a dramatic draft coming out the bottom of the fireplace when not in use. It was too the point I ended up just covering the whole fireplace over from the inside with plastic and not...
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    Yes Virginia there is a Santa Claus

    The next time you quote me please use the correct name so everyone will understand it: XAVIER”S KISS HRV!

    What is now necessary in all home that are energy efficient is not only must you...
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    Merry "X"mas & Happy New Year

    You are correct!

    “Xavier, 10 years here with 600-700 posts! You must be a man of few words.”

    As we know Jerry it is “Quality” not quantity that is important. :payattention:

    Also, Brevity is...
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    XAVIER"S HVAC Christmas Post

    I have been reading many posts lately and will address some solutions here in my Christmas Post hoping it can help some of you improve your Indoor Air Quality and Quantity (IAQQ)!

    As I have been...
  35. Thread: Booster Fans

    by Xavier
    Replies
    21
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    2,080

    Flow vs Velocity

    As I have stated here for years “A booster fan will reduce flow but may increase velocity!” :)
  36. Replies
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    Controlling air exchange

    What I have been using for over 25 years is Thermal Imaging. The first time I used it the pictures were in black and white and a little difficult to interrupt. The technology/camera has come a long...
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    No more Baseball Go Wings

    Since the Tigers lost yesterday in a great game, I will respond today to some of the recent posts while I listen to the games, even though some of them I do not understand...

    David you make two...
  38. Replies
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    The secret may finally be out of the bag!

    Shophound for a quite a while now you (too) have been explaining to improve Indoor Air Quality and Quantity (IAQQ) we should/must consider the building as a system. Please STOP or others on this...
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    Home as a "System"

    Thanks for the comments Brian, but I think you maybe wasting your time. After all, many of the posters support and install one central return, cutting the bottom of the door off, or installing back...
  40. Replies
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    Time to Switch!

    It is time to switch the louvered returns again (thanks for the reminder in the other post) for the winter, for us who have installed them!

    As I have stated many times, I recommend what I have...
  41. Walking the TALK

    And when you get done sealing everything, below is a simple test to check your workmanship! :angel:

    This test should also work in the South! :LOL:

    We have had turning vanes in our trunk lines...
  42. More information required!

    Very interesting/amusing post.:pop:

    If the system has a "TXV" how will that affect this lengthy post? :anyone:
  43. Replies
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    Combustion Air

    Open a window and run the test!

    I have received many calls on Tankless water heaters backdrafting
  44. Replies
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    CLASS!

    Thanks again for showing everyone on HVAC your lack of professionalism when someone disagrees with your post and explains why it was nugatory.
  45. Replies
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    8,662

    Air exchanges

    [QUOTE=Carnak;4376602]That effect is really about infiltration that someone with only a northern frame of reference thinks only happens in the winter.

    Air Handlers creating a Delta P between...
  46. Replies
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    Again Half Empty

    "The best way to know God is to love many things."

    Good Advice!:)
  47. Replies
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    Keep on Posting

    This is my last post here this season so to close: it must be very sad for all you to live each day thinking the glass is “Half Empty” and try to feel important by posting your negative comments and...
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    Proof

    If you have been reading my posts, you know I Walk My Talk, and use ROI to select the best system and post only what I have in my home or have used to resolve problems in my consulting.

    Attached...
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    Opinions

    Below are my opinions to some of this seasons post.

    From BrianGC

    “Carnak,
    Now I understand why your post count is so high… you keep pounding on someone until you inadvertently learn...
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    HVAC Systems

    I just got back from visiting my older Son's new home in South Carolina and will read and respond to all appropriate posts later.

    But first, My Son’s new home is very nice BUT the HVAC...
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