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  1. The greatest operating cost and wear on the...

    The greatest operating cost and wear on the system comes during system start up.

    just because it bears repeating.

    zoned systems can be a wonderful thing when done correctly.
    otoh...they can be...
  2. OP, did you get in touch with classical? take...

    OP,
    did you get in touch with classical?
    take him up on his offer!

    I'm sure he can steer you towards like
    minded contractors.

    best of luck
  3. Replies
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    sorry if I wasn't clear. OP asked about...

    sorry if I wasn't clear.

    OP asked about upsizing 1/2 a ton.

    not ideal, but not uncommon.

    one way to provide better humidity removal
    is to install a variable speed air handler unit.
    ...
  4. Replies
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    vs ahu

    vs ahu
  5. Replies
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    can you answer some of the questions? what...

    can you answer some of the questions?

    what size is return air?...it is written on the
    filter.

    fwiw,
    I upsized 1/2 a ton. but for better humidity removal
    I have a variable speed air handler....
  6. I agree with the whole house dehumidifier. set...

    I agree with the whole house dehumidifier.
    set it up with fresh air intake, set DH300 controller
    to 50% & forget about it until it is time to change
    the filter.

    from your post:
    "energy...
  7. X2 on heat pump vs elec strip heat only.

    X2 on heat pump vs elec strip heat only.
  8. in my hvac classes there was no training in...

    in my hvac classes there was no training in installing a duct
    system at all. much-less in a home with no existing duct system.
    in addition to the techincal aspect, there is more to this type...
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    I think I need to make a site visit to advise you...

    I think I need to make a site visit to advise you on this issue.
  10. notice how the foam seals the roofline to the...

    notice how the foam seals the roofline to the attic floor, completely
    sealing off soffits.
    also the foam covers the faces of the rafters with full depth of foam
    in rafter bays.

    understand that...
  11. sure if the walls are open, get a roll of R-13...

    sure if the walls are open, get a roll of R-13 (or R-15 if you can find it)
    and insulate away. you'll never be able to do it so easily & inexpensively
    as when the walls are down to studs. and caulk...
  12. Good. when gathering info etc, pick everyone's...

    Good.

    when gathering info etc, pick everyone's brains about foam insulation.
    you can spend a lot of time air sealing every opening...but if you run the
    numbers between the hands on air sealing,...
  13. I was working in Algiers Point a couple of weeks...

    I was working in Algiers Point a couple of weeks
    ago...4 days. great old house...but dirty attic!

    lets slow down a minute.
    400 sq ft per ton will have the system so oversized
    that you'll get...
  14. what location? here is floor insulation info...

    what location?

    here is floor insulation info for hot humid climates
    excellent info from LSUAg center.
    ...
  15. nice replies ductman! (& Happy Easter y'all!) ...

    nice replies ductman! (& Happy Easter y'all!)

    Op, can you post a few pics?
  16. did anyone look at the return air? unsealed...

    did anyone look at the return air?
    unsealed leaky return will cause RH to rise.

    best of luck.
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    first of all, your wife has my sympathy. bad...

    first of all, your wife has my sympathy. bad enough to
    have the disorder & then have such charming support.

    it isn't a good thing to add pav's (powered attic vent) to the
    attic. they do pull...
  18. I don't get the reason for the post. homeowner...

    I don't get the reason for the post.

    homeowner did load calc, but ignores it.
    hvac company doesn't do calcs, wouldn't install system
    to someone else's load calcs.

    its a wag as to the size of...
  19. Replies
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    I use the filters with the 1" lip 20x25 buy...

    I use the filters with the 1" lip 20x25
    buy them by the case (of 5) from my hvac supply house.

    OP,
    I didn't purchase the deeper filter rack either, so I've
    been using the filters with the lip....
  20. if they wrote down the cfm for each supply, then...

    if they wrote down the cfm for each supply,
    then you should be able to determine the ducts
    that leak.
    size of duct & cfm delivered.

    ditto on both setting of fan speed
    & return leakage.

    I...
  21. how did you measure cfm of registers?

    how did you measure cfm of registers?
  22. Replies
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    "" I generally stay out of discussions in...

    ""

    I generally stay out of discussions in northern climates...but just
    wanted to provide some unbiased info about foil bubble foil stuff.
    ...
  23. "For bubble wrap to be effective on ducts, the...

    "For bubble wrap to be effective on ducts, the installers would have to put in spacers to keep the bubble wrap from being in contact with the ducts. Not once have I seen spacers on bubble-wrap...
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    wood is a poor conductor, metal is an excellent...

    wood is a poor conductor, metal is an excellent conductor.
    this is why metal window frames condensate. to the warm
    side always. we just notice it in the winter...
    just fyi...
  25. Replies
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    true, but window tints on single wood windows...

    true, but window tints on single wood windows work well.
    solar screens. caulking the window frames to the walls will
    be a boost to comfort. better use of the $$, and not as costly.

    if OP's house...
  26. Replies
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    Entergy New Orleans - Energy Smart energy...

    Entergy New Orleans - Energy Smart energy efficiency home fix-up program.

    Local solar with energy efficiency Posigen or www.gosunpro.com
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    have to agree with Dan. long payback on windows....

    have to agree with Dan. long payback on windows.
    good money that could be used to improve the efficiency
    of the house elsewhere.
    windows will save you 7-15% at best. for thousands of dollars...
    ...
  28. can you move the vent?

    can you move the vent?
  29. "" building a furdown is a good idea. if you...

    ""

    building a furdown is a good idea.
    if you paint it to match the walls you'll hardly notice
    it in a short time.

    best of luck
  30. Replies
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    hvac companies in your area will be a better...

    hvac companies in your area will be a better
    source of information than the utility company.

    size the unit for the house.
    & you'll probably need separate source for garage/work area.
    you do...
  31. Replies
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    Yay someone building!!! it is so much easier to...

    Yay someone building!!! it is so much easier to build it right to start with.

    use this guide for your walls:...
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    http://energy.gov/energysaver/articles/cool-roofs...

    http://energy.gov/energysaver/articles/cool-roofs

    in Miami a cool roof would provide you good savings.

    if you put foam sheathing under the roofing it will
    also stop thermal bridging of...
  33. is the top of the closet open or sealed closed?...

    is the top of the closet open or sealed closed?
    can you take a pic of the top of the closet?

    any issue with water on the platform, sure
    looks like water tracks on the ahu cabinet.
  34. 555151I order mine by the case @ hvac supply. ...

    555151I order mine by the case @ hvac supply.

    ask your hvac company about media filters
    that retrofit into you existing return.
    or change return air filter grill rack to one that
    fits without...
  35. which one did the manual j to determine what...

    which one did the manual j to determine
    what size system you need?
  36. Replies
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    the only insulation that stops air flow is spray...

    the only insulation that stops air flow is spray foam insulation.
    cellulose will slow the air movement, more so than fg...but
    not stop it.

    air sealing is a different animal than insulation with...
  37. Replies
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    average for duct system has 30% loss. you lose...

    average for duct system has 30% loss.
    you lose at least 1/3 of every dollar spent
    on utilities, every time the system operates.

    just like air sealing your house, you
    can diy duct sealing.
    ...
  38. " wow X 2

    "

    wow X 2
  39. when air is forced into the house, it picks up...

    when air is forced into the house, it picks up particulate matter
    from openings in the duct system, supply boxes, plenum connections etc.

    rather than purchasing things to clean the air, you...
  40. Replies
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    X2

    X2
  41. pics?

    pics?
  42. expect that $50 audit from utility company to...

    expect that $50 audit from utility company to
    only reduce your energy costs by 10-15%.
    after all their business is to sell you energy.

    I'd opt out for independent analysis with
    blower door...
  43. Replies
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    most homeowners assume their homes are tight. I...

    most homeowners assume their homes are tight.
    I see it with every blower door test I do.

    very few are actually tight, it doesn't just happen
    very often.

    with a leaky house (& duct system) OP...
  44. Replies
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    I just had to google it..and there you are.....

    I just had to google it..and there you are..
    insulation sleeves.
    who knew?

    (obviously not me)

    R-8 is the ticket.

    just keep the insulation tight to the
    hard pipe. how are you securing...
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    no. gaps between the hard pipe duct & the...

    no.
    gaps between the hard pipe duct & the insulation will
    allow condensation to form.
    you want the insulation snug but not compressed.

    can't imagine that bags of flex are cheaper than wrap......
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    radiant barriers are only good in summer, no...

    radiant barriers are only good in summer, no winter benefits,
    or so infinitesimal as to be moot.

    you can always stage the heat strips so that they don't come
    on in full size during times when...
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    in using larger size flex..how do you keep...

    in using larger size flex..how do you keep insulation
    in full contact with the hard pipe?
    duct would have be be unassembled?

    seems more hassle/cost than necessary, unless I just
    had excess flex...
  48. the precision of those cut out cardboard...

    the precision of those cut out cardboard pieces...
    not too shabby.
    except, well...its cardboard.
  49. "" fire rated foam I hope. there are a couple...

    ""

    fire rated foam I hope.
    there are a couple of ways to deal with leaky electrical boxes.
    air tight boxes
    or foam gaskets placed under covers.

    metal framed windows will always condensate....
  50. windows are high cost with minimal impact on...

    windows are high cost with minimal impact on efficiency.
    7-14% energy efficiency improvement is all you get with
    windows.

    better use of time & monies would be to air seal.
    starting with attic...
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