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Thread: Undersized AC

  1. #53
    Join Date
    Jun 2008
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    NW Florida
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    707
    Quote Originally Posted by tedkidd View Post
    Insulation is like speed bumps to heat loss/gain. R30 is like one bump, and hot summertime attics are like formula 1 tracks. Heat is coming in at 200 mph.

    You need heat gain slowed to 5 mph. To achieve that r50-r60 is needed. Air seal and insulate that attic and 2 tons will probably NEVER run continuously.
    Maybe in New York. Not in the south.

  2. #54
    Join Date
    Jul 2008
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    Rochester NY
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    Quote Originally Posted by meoberry View Post
    Maybe in New York. Not in the south.
    What, attics aren't hot in the south?

    The laws of heat transfer don't apply in the south?

    People in the south don't know how to communicate?

    People in the south don't know crap about building science?

    People in the south like to ?

    What are you trying to say about the south?
    Which makes more sense to you?
    CONSERVATION - turning your thermostat back and being uncomfortable. Maybe saving 5-10%
    ENERGY EFFICIENCY - leaving your thermostat where everyone is comfortable. Saving 30-70%

    DO THE NUMBERS! Step on a HOMESCALE.
    What is comfort? Well, it AIN'T just TEMPERATURE!

    Energy Obese? An audit is the next step - go to BPI.org, or RESNET, and find an auditor near you.

  3. #55
    Join Date
    Dec 2010
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    Down by the river
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    Quote Originally Posted by meoberry View Post
    Maybe in New York. Not in the south.
    Agreed with tedkid, what are you talking about?
    It's hard to stop a Trane. but I have made one helluva living keeping them going.

  4. #56
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    Sep 2002
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    I don't know
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    Quote Originally Posted by meoberry View Post
    Maybe in New York. Not in the south.
    Maybe the south has crappy building codes.
    General public's attitude towards our energy predicament: "I reject the reality of finite resource depletion and substitute it with my own; energy is infinite, we just need an alternative storage medium to run the cars on. The economy can grow indefinitely - we just need to "green" everything! Technology is energy! Peak what?"

  5. #57
    Join Date
    Dec 2010
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    Down by the river
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    Quote Originally Posted by amd View Post
    Maybe the south has crappy building codes.
    we all go by the same energy code standards
    It's hard to stop a Trane. but I have made one helluva living keeping them going.

  6. #58
    Join Date
    Aug 2011
    Posts
    568

    Cool

    Quote Originally Posted by Southern Mech View Post
    we all go by the same energy code standards
    well, maybe some inspecters have better glasses, then others!

  7. #59
    Join Date
    May 2004
    Location
    south louisiana
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    3,185
    Maybe I missed it...but where does OP reside?
    anyone?? OP??
    The cure of the part should not be attempted without the cure of the whole. ~Plato

  8. #60
    Join Date
    Aug 2011
    Posts
    568

    Hmm

    Quote Originally Posted by energy_rater_La View Post
    Maybe I missed it...but where does OP reside?
    anyone?? OP??
    your neck of the woods, mississippi!

  9. #61
    Join Date
    Jun 2008
    Location
    NW Florida
    Posts
    707
    Quote Originally Posted by tedkidd View Post
    What, attics aren't hot in the south?

    The laws of heat transfer don't apply in the south?

    People in the south don't know how to communicate?

    People in the south don't know crap about building science?

    People in the south like to ?

    What are you trying to say about the south?
    You need to go back and read what has been said on the thread. They do teach reading comprehension down hear. The house used to have a very large attic fan. Those have not been used since lets say late 60s early 70s. This house was built to ventilate. Down here, back then heat was the problem not the cold. House was designed to breathe. So to get it to cool like a modern hose. It has to be tightned up. Just pouring insulation in it will not solve the problem. Insulation does not seal air infiltration. To properly tighten up house would involve some siding material with an insulated backing. Like say vinyl siding with a foam backer board behind it and alot of closed cell spray foam for attic and under flooring. New windows and doors. But all this is getting very expensive real fast. Now up north your older homes where built to keep heat in. With plenty of windows for cross ventilation for summer. Nothing wrong with either technique. Was just the best way for the climate. But each has it inherent problems. I have lived up north further up than New York. I had rather sweat than freeze. I hate the snow.

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