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  1. #14
    Join Date
    Jan 2013
    Posts
    26
    So an undersized duct can crack heat exchangers? No one speculated this out loud to me. I am told that there is flex ducts in my crawl space. -O.

  2. #15
    Join Date
    Feb 2012
    Location
    Toronto Canada
    Posts
    1,090
    If we are just picking Brands I would go with York

    The Machine isnt gonna be the problem it's the install and proper sizing that matter's

    All the contractor's are just matching the same BTU as before? Anyone do a heatLoss?

  3. #16
    Join Date
    Jan 2013
    Posts
    26
    OldSchoolMech: We have an energy audit on Mon am; that should provide some of these answers right? -O.

  4. #17
    Join Date
    Oct 2010
    Location
    Anderson, South Carolina, United States
    Posts
    7,528
    Quote Originally Posted by OldSchoolMech View Post
    If we are just picking Brands I would go with York

    The Machine isnt gonna be the problem it's the install and proper sizing that matter's

    All the contractor's are just matching the same BTU as before? Anyone do a heatLoss?
    X2 on York equipment, but it doesn't matter what equipment you put in if its not properly sized, sealed and ducted. It will have problems and live a short life if proper procedures are not followed.

  5. #18
    Join Date
    Oct 2010
    Location
    Anderson, South Carolina, United States
    Posts
    7,528
    Quote Originally Posted by ofrancois View Post
    OldSchoolMech: We have an energy audit on Mon am; that should provide some of these answers right? -O.
    Yes, that is a very good idea. Hopefully they will do a thorough job. Are you paying for the audit or is it "free" with the quote?

  6. #19
    Join Date
    Jan 2013
    Posts
    26
    jtrammel: I did not originally think it was connected to a quote but it looks like it may be We are also signed up for something through the city. -O.

  7. #20
    Join Date
    Jan 2013
    Posts
    26
    Correction: they do work with the city.

  8. #21
    Join Date
    Oct 2010
    Location
    Anderson, South Carolina, United States
    Posts
    7,528
    http://www.comfortinstitute.org/whol...e-checkup.html this is what the energy audit should include possibly a little more or maybe less.

  9. #22
    This is the Ask Our Pro's forum, and only Pro members that have been vetted by the AOPC may post advise, commentary, or ask questions of the OP here. Please apply to the AOPC today, thank you.

    You can find the rules for posting and qualifications here.

    Further infractions may result in loss of posting privileges.
    Last edited by beenthere; 01-27-2013 at 07:29 AM. Reason: Non Pro * Member

  10. #23
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,366
    Starwarsith88HVAC, this is the Ask Our Pro's forum, and only Pro members that have been vetted by the AOPC may post advise, commentary or ask questions of the OP here. Please apply to the AOPC today, thank you.

    You can find the rules for posting and qualifications here.

    Your post has been deleted.
    Further infractions may result in loss of posting privileges.
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    How many times must one fix something before it is fixed?

  11. #24
    Join Date
    Jan 2013
    Posts
    26
    jtrammel- that was helpul. Thank you. -O.

  12. #25
    Join Date
    Oct 2004
    Location
    So Cal
    Posts
    3,557
    You didn't state the size of the existing system but I'd assume it's a 2 ton. Correct me if it's larger.
    2 ton is the smallest unit you can buy so a load calc will tell very little in this situation (matching BTU to the old unit). Remember, he's dealing with 800 sq ft. However- duct sizing will tell all. Since a/c works & blower works- if I was selling this job- I'd find out the TESP on the existing system before I removed anything. That will tell you if the duct system is sufficient or needs mods. So will a visual on ducts but I'm betting ducts are not very accessible if you have a flat roof. At 800 sq ft- I'm betting the smallest 2 ton unit will be oversized. Why aren't you addressing the lower floor? Perfect time to do so IMO.

  13. #26
    Join Date
    Jan 2013
    Posts
    26
    percision havc: I have another system that services the basement and the first floor. We have only been surviving the cold because of this system.

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