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  1. #1
    Join Date
    Mar 2013
    Posts
    112

    No one needs to do a load calc.

    The Carrier guy said he doesn't need to know any of that information and I was looking to install a greenspeed. all he said to me was he recommends a performance model and it is more common. he asked me to send him the house plans.

    The Whestinghouse said I needed a 3 ton without a load cals.

    I cant get a response from anyone when I ask them to do a load cals.

    What do I do when I can't install it myself.

    I know I need a 2 ton for cooling and a 2 ton for heating, I would like to have a 2.5 ton for heating in the northing environment.

    I have a heat gain of 21475 and a heat loss of 24672. this is baesd on 7 degrees. so a 2 ton is all I need.

    Everyone here seems to go by rule of thumb.

    Jimmy

  2. #2
    Join Date
    Oct 2010
    Location
    Anderson, South Carolina, United States
    Posts
    7,682
    Quote Originally Posted by JimmyP View Post
    The Carrier guy said he doesn't need to know any of that information and I was looking to install a greenspeed. all he said to me was he recommends a performance model and it is more common. he asked me to send him the house plans.

    The Whestinghouse said I needed a 3 ton without a load cals.

    I cant get a response from anyone when I ask them to do a load cals.

    What do I do when I can't install it myself.

    I know I need a 2 ton for cooling and a 2 ton for heating, I would like to have a 2.5 ton for heating in the northing environment.

    I have a heat gain of 21475 and a heat loss of 24672. this is baesd on 7 degrees. so a 2 ton is all I need.

    Everyone here seems to go by rule of thumb.

    Jimmy
    Keep looking, www.bpi.org www.comfortinstitute.org

  3. #3
    Join Date
    Mar 2013
    Posts
    112
    Quote Originally Posted by jtrammel View Post
    Problem is we are isolated in St. John's NL canada and there are a handful of people that do this. Cost is 10 fold of what you would normally pay. I don't mind paying the cost i just want it done how it should be done.

  4. #4
    Join Date
    Oct 2010
    Location
    Anderson, South Carolina, United States
    Posts
    7,682
    Fly me up, I'll do it for 10x what I would normally get for a 2 ton inverter drive heat pump and duct system...lol Just keep looking and demand a load calc etc. I'm guessing there is no one in your area on the contractor locator on this site or the ones I linked or www.resnet.us www.natex.org

  5. #5
    Join Date
    Mar 2013
    Posts
    112
    Quote Originally Posted by jtrammel View Post
    Fly me up, I'll do it for 10x what I would normally get for a 2 ton inverter drive heat pump and duct system...lol Just keep looking and demand a load calc etc. I'm guessing there is no one in your area on the contractor locator on this site or the ones I linked or www.resnet.us www.natex.org
    We should start a buisness with all propper QC

  6. #6
    Join Date
    Mar 2013
    Posts
    112
    I would like to think there are alot of qualified and good HVAC people here I think they use ROT more than necessary

  7. #7
    Join Date
    Mar 2013
    Posts
    112
    I should say use the ROT more than they should or never use it at all

  8. #8
    Join Date
    Aug 2012
    Posts
    2,720
    Quote Originally Posted by JimmyP View Post
    We should start a buisness with all propper QC
    We'll start with your spelling, I know mine sucks two.
    My name is TooCoolforschool and I am a chronic over charger.

  9. #9
    Join Date
    Jun 2005
    Location
    SW Wisconsin
    Posts
    5,025

    The entire existing situation needs evaluating before making wild equipment offers

    It is not that difficult to learn how to do fairly accurate load calcs.

    Even I can do them, & have only a few brain cells left.

    You have to evaluate the duct system, airflow, etc., before you even consider providing them with an estimate.

    A load calc is essential before providing any equipment sizing numbers.

    If the heat gain & loss are considerably more than what is considered, in the ballpark, then weatherization work is called for along with duct efficiency work...before proper equipment sizing takes place...

  10. #10
    Join Date
    Mar 2013
    Posts
    112
    Quote Originally Posted by udarrell View Post
    It is not that difficult to learn how to do fairly accurate load calcs.

    Even I can do them, & have only a few brain cells left.

    You have to evaluate the duct system, airflow, etc., before you even consider providing them with an estimate.

    A load calc is essential before providing any equipment sizing numbers.

    If the heat gain & loss are considerably more than what is considered, in the ballpark, then weatherization work is called for along with duct efficiency work...before proper equipment sizing takes place...
    That is all I am asking for. To get someone in and look at this place. and get an estimate and equipment suggestions.

    I have done one using HVAC Calc Residential 4.0.

    The house is 1200sq ft for basement and 1200sqft main floor R20 in walls on main floor, R38 in half wall in basement R10 foamboard for 3 ft of concrete basement walls. 1600 sq ft vaulted ceiling with R38. The main wall is 435 sq ft south east facing and has 181 sq ft of low e argon windows so both heat gain and heat loss.

    I come up with a 2 ton for cooling
    Last edited by JimmyP; 04-03-2013 at 03:05 PM. Reason: spelling

  11. #11
    Join Date
    Dec 2002
    Location
    Arizona
    Posts
    4,422
    Also go here. https://www.acca.org/consumer/find-a-contractor/

    I'm flying to Arlington VA on Monday to spend a week with Hank R the author of Manual J to be certifided as an instructor in the ACCA manuals.
    Make your expertise uniquely valuable.

    Make your influence uniquely far-reaching.

  12. #12
    Join Date
    Dec 2002
    Location
    Arizona
    Posts
    4,422
    Find out who the local distributor is of your desired equipment and call them, explaining that you would like a dealer that will do a Manual J. Or if they would be able to complete one on your home.
    Make your expertise uniquely valuable.

    Make your influence uniquely far-reaching.

  13. #13
    Join Date
    Mar 2013
    Posts
    112
    Quote Originally Posted by jimj View Post
    Find out who the local distributor is of your desired equipment and call them, explaining that you would like a dealer that will do a Manual J. Or if they would be able to complete one on your home.
    Small town no distributor, 3 or 7 indipendent HVAC installers. Someone I know had a 5 ton installed on on r2000 home ? go figure

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