Just Became Member
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  1. #1
    Join Date
    Apr 2013
    Location
    Boston
    Posts
    19

    Just Became Member

    Hi
    My name is Michelle. I joined this site to educate myself about HVAC. My brother owns a HVAC company and I now work for him.

    I have a BS in Civil Engineering but do not know a lot about how the Heat Load Calculations are done. I heard about the Manual J & D. I also downloaded a HVAC Calc. program that gives you the heat gain and loss answers. I am more interested and how they get those answers. What formula's are they using, etc.

    I also have a lot of questions regarding high velocity systems. Why are they so touchy?????

  2. #2
    Join Date
    Dec 2002
    Location
    SouthEast NC ICW & Piedmont Foothills
    Posts
    7,635
    you can purchase the ACCA manuals and go from there.
    given enough repetition they become easy, to use the long forms.
    It`s better to be silent and thought the fool; than speak and remove all doubt.

  3. #3
    Join Date
    May 2006
    Location
    houston texas
    Posts
    57
    do some reading on thermodynamics ,which is part of mechanical egineering

  4. #4
    Join Date
    Mar 2013
    Location
    Joplin,Missouri
    Posts
    310
    Welcome I am new here myself. Life of people willing to help and lots of good info here. I'm definitely glad I joined

  5. #5
    Join Date
    Mar 2013
    Location
    Joplin,Missouri
    Posts
    310
    Meant to say lots of people not life of people lol

  6. #6
    Join Date
    Dec 2011
    Location
    Grass Lake, MI
    Posts
    251
    Welcome. I would suggest enrolling in classes specializing in Manual J & D. You can obtain a good foundation to work with as you study the Manuals your self. The best way to learn, get out there and do it. Don't rely on the apps and software options. Do it long hand for a while and you will have a better understanding than most of the jokers out there making every decision by sq footage and there thumb from the curb.

    If you want to be the be best, you have to strive to be the best!

  7. #7
    Join Date
    Apr 2013
    Location
    Boston
    Posts
    19
    I took thermodynamics, it was a required course in the C.E. program. I remember closed systems vs open, graphs for points of vapor etc., but not much more. Was Bernoli's (sp) equation used?

  8. #8
    Join Date
    Apr 2013
    Location
    Boston
    Posts
    19
    Thanks for the advice.
    I have to do a heat load calculation for a home in Somerville, MA. The city requires the calculations to be done in order to obtain a permit.

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