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Type: Posts; User: hivacjack

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  1. Replies
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    .......I agree with your comments as regards to...

    .......I agree with your comments as regards to most but not all production
    builders, but I hope you understand that custom building is a somewhat different animal with higher expectations for...
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    ..........? are you refering to the guy waving...

    ..........? are you refering to the guy waving from the back of the truck? :):):)
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    .........call 4 companies and chances are you...

    .........call 4 companies and chances are you will get 4 different results. Sorry, but the competence behind the Manual J calculations (and therefore the reliability of the results) is no better in...
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    .......I don't believe that HOME DEPOT vets thier...

    .......I don't believe that HOME DEPOT vets thier TRANE install contractors for quality. The store closest to me happens to use a firm with about the
    highest no of BB complaints and lawsuit...
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    ........you need to compare the output from a...

    ........you need to compare the output from a Manual J compliant load calculation to the MFR's capacity vrs ODT data. Then augment that with some common sense guesses with respect to percieved...
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    .......if your calc says 24K SENSIBLE then 3 TON...

    .......if your calc says 24K SENSIBLE then 3 TON is where you want to be. The sensible cooling for most 3 TON HP's (or AC) will be in the 25-27.5K BTUH
    range. And thats before derating for ID design...
  7. Thread: Carbon M ??

    by hivacjack
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    1,434

    ....so what levels of CO might be found in a...

    ....so what levels of CO might be found in a conventional woodburning FP?
  8. ........go to jdpower.com and incert HVAC into...

    ........go to jdpower.com and incert HVAC into the search window.
  9. .....it so happens that the 2twr4048 has been...

    .....it so happens that the 2twr4048 has been discontinued. Why talk about it. Some including me might consider it somewhat unethical to sell and install it over a current and much improved CURRENT...
  10. Replies
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    The 2007 one ranks Trane #1...

    The 2007 one ranks Trane #1
    http://www.jdpower.com/corporate/news/releases/pdf/2007135.pdf

    Note that the 2006 survey gave warranty and repair service, ordering proccess, and sales/marketing...
  11. .......speaking of old WEATHERTRONS does anyone...

    .......speaking of old WEATHERTRONS does anyone remember how much the capacity fell off between 47F and 17F? I'm sure there were no ARI ratings
    in 1982, but leaving efficiency aside, has the low...
  12. Replies
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    [QUOTE=beenthere;1708165]I've sold and installed...

    [QUOTE=beenthere;1708165]I've sold and installed Goodman for private residence, and apartment complexes.

    I've used Goodman in some small commercial applications.
    Along with all the other popular...
  13. Replies
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    ..........how do you axcess the GOODMAN spec...

    ..........how do you axcess the GOODMAN spec pages??
  14. Replies
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    Sequencers are a high voltage time delay that...

    Sequencers are a high voltage time delay that delays the voltage being sent heat strips, so that they are staged(first bank on,delay, second bank).[/QUOTE]


    Most 15KW heaters consist of 3 5KW...
  15. Replies
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    Pretty sorry that everyone's most beloved brand...

    Pretty sorry that everyone's most beloved brand can't always get the decent SEER. With some brands that can get 14 with just a coil and standard blower, pretty bad that A-S has trouble hitting 14...
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    ....plot the peak heat load presented by your...

    ....plot the peak heat load presented by your house vrs outdoor temperature for some desired indoor temperature.

    Plot the output capacity of your heat pump vrs OD temperature.

    Where the curves...
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    TRANE Air Handler Install

    .....the 4TEE series of convertible air handlers ships from the factory with the Right Horizontal drip pan installed as well as a wide baffle assembly attached to the apex of the coil. The...
  18. ....also if you have a 3 Ton heat-pump Air...

    ....also if you have a 3 Ton heat-pump Air Handler system with BAYHTR1415BRKR and have doubts about a flaky installer I would recomend verifying that your air handler's dip switch minimim air CFM...
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    ......the ACH value for a 2200sf house of...

    ......the ACH value for a 2200sf house of "average construction" in my software is .8. In real life you have to work pretty hard to get down to .3. Caulk EVERYTHING including all plates, rim boards,...
  20. Thread: Heat Pumps

    by hivacjack
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    ....at 0F you need to think about sufficiency not...

    ....at 0F you need to think about sufficiency not efficiency. The air source HP
    will be operating at less than less than half it's 47F capacity and the COP will be in the 2 or less range. At these...
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    "Also, a house with enough strip heat for design...

    "Also, a house with enough strip heat for design conditions will switch to emergency heat for the night. Saving themselves an after hours service charge that more then makes up for the extra electric...
  22. Replies
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    Fossil fuel fired furnaces outnumber HP's by a...

    Fossil fuel fired furnaces outnumber HP's by a substantial margin. What do you
    think a customer would say to a proposal which suggests installing TWO gas
    fired furnaces in a mannar such that the...
  23. Replies
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    .....is a dead condenser (at peak load...

    .....is a dead condenser (at peak load conditions) substantally more probable than a dead furnace at any load? At .125/Kwh the savings over the life of the life of the system will likely pay for it....
  24. Replies
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    TRANE Strip Heater Staging

    BAYHTR1415BRK is set up to come on with 10Kw first and 5Kw second. And the Trane 10Kw heater (BATHTR1410) can't cant be staged at all. Any particular reason that the TRANE HP's need such a big kick...
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    Resistance Strip Sizing

    It seems the prevailing "wisdom" is to size the backup heaters to handle the entire design load. WHY? The IRC doesn’t seem to require redundancy in residential HVAC systems. In this particular case...
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    .......gee, one more time: if the windows can...

    .......gee, one more time: if the windows can never see the 49BTUH/sq-ft
    the model predicts how do you arrive at a reasonable value for the load?
    .....throw away the solar gain, modify it with some...
  27. Replies
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    .........so the comment is oversize the AC to get...

    .........so the comment is oversize the AC to get dehumidification under control? ain't it likely more arid if the AC run longer?
  28. Replies
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    for this particilar case: .........45 degree...

    for this particilar case:

    .........45 degree rotation of wall delta(sensible) is about 31% roughly 4000BTUH, 65% shading changes sensible by about 8400BTUH etc.

    DIVERSITY??????Exposure...
  29. Replies
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    :D .....if the load calc is by the hour...

    :D


    .....if the load calc is by the hour where's the time input?

    You need to manipulate the program by adding windows in various directions and you'll quickly see E=W gives 49BTUH/sq-ft. S...
  30. Replies
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    ......summer temperatures almost never peak...

    ......summer temperatures almost never peak untill the 3 to 5pm time frame.
    At 1Pm you will likley be 4 or so degrees below the DT. At 4:15 (treeset)the additional loading stops dead in its tracks,...
  31. Replies
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    .....latent is 3386.

    .....latent is 3386.
  32. Replies
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    ....question is how do you arrive at a sensible...

    ....question is how do you arrive at a sensible sensible.
  33. Replies
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    ...latent is easily accomodated even by a 2...

    ...latent is easily accomodated even by a 2 TON....not a problem. DT's are respectively:
    (8F, 68F) and (97F, 77F). Heat load is about 41,500 BTUH at DT. Heating degree days=
    4500.
  34. Replies
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    .....staging 10Kw in three incriments seems like...

    .....staging 10Kw in three incriments seems like a very good idea from an energy conservation standpoint. The TRANE 10Kw heater can only be run single stage.....outch! thats about $1.20/hr at...
  35. Replies
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    .....doesn't seem to break right for a 2 stage...

    .....doesn't seem to break right for a 2 stage since they come in 1 Ton increments. Without correction the sensible is 28,700BTUH. A 30% correction on the solar gain takes it to around 22,000 so even...
  36. Replies
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    Load Calculation A Tough Call

    House faces E and sits on bull nose cleared N to S. The horizon to both the east and the west is cut off by DENSE tree lines. In July the sun rises over the tree line around 9:30AM EDT. Windows...
  37. Replies
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    ....a sensible gain of 32,500BTUH is in 3 1/2 Ton...

    ....a sensible gain of 32,500BTUH is in 3 1/2 Ton territory.
  38. stay within the same capacity to make the...

    stay within the same capacity to make the comparison. i.e. compare 3Ton single stage
    to 3Ton single stage. There aren't many 2 stage HP's which have a lower HSPF version
    in the product line. For...
  39. http://aridirectory.org

    http://aridirectory.org
  40. 17 Degree Capacity Goes South When HSPF Goes North

    Anyone understand why? If you peruse the aridirectory.org HP database you
    can't help notice that the ARI 17 degree values move inversly to the HSPF
    figure of merit. It looks like ECM fans and...
  41. .....wait a minute. HSPF is a figure of merit...

    .....wait a minute. HSPF is a figure of merit which does not give full and complete consideration to resistance strip energy consumption. ANY two heat pumps with the same HSPF will (even if the...
  42. Replies
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    TRANE Restance Heater Staging

    Hi. Can anyone answer the following? For the case of the TRANE 14-15 SEER line of 3-31/2 Ton Heat Pumps coupled with the appropriate variable or fixed speed air handler, and requisite outdoor...
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    Caught In The Middle

    Load calc gives sensible halfway between Carrier 25HPA (with respective ECM Handler) 3Ton and 3 1/2Ton spec'd values. Question? Which will give lowest total heating cost? (HSPF=8.5, Degree...
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