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  1. Replies
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    http://www.acca.org/standards/speedsheets...

    http://www.acca.org/standards/speedsheets
    ==================================

    THAT IS WHY
    ......... I developed MY CALC
    .... SIMPLE, QUICK, VERSATILE &
    Can be used with Existing building...
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    THE DEVIL IS IN - THEE DETAILS..!..!!

    ==============
    What type of glass?
    U-factor?
    S.H.G.C.: 0.2 to 0.8?

    What is Solar Insolation Value (SIV) in each direction?
    ... THROUGHOUT THE DAY

    http://solarinsolation.org/
  3. 220 Cooling Degree Days in Seattle might...

    220 Cooling Degree Days in Seattle might translate to ONLY 180 full operating hours.
    ............................................... -------------- i.e. -- 35 DAYS for ~5 hours /day
    Local WA...
  4. http://www.nonoise.org/library/sndbasic/sndbasic.h...

    http://www.nonoise.org/library/sndbasic/sndbasic.htm#5

    Rules of Thumb

    WHEN A SOUND INCREASES BY 10 DECIBELS, THE SUBJECTIVE RESPONSE IS A DOUBLING OF LOUDNESS
    Example: 60 decibels to 70...
  5. TRANE XR14 SPEC ...

    TRANE XR14 SPEC

    https://www.trane.com/content/dam/Trane/Commercial/global/products-systems/equipment/unitary/split-systems/split-systems-1-1-2-to-5-tons/22-1765-10%204TWR40.pdf
  6. TRANE model number 4 TWR 4030 .... 4:...

    TRANE model number 4 TWR 4030

    .... 4: Refrigerant R-410A
    TWR: Heat Pump
    ....4: 14 SEER
    030: 2.5 Ton from 30,000 /12,000 = 2.5
  7. Thread: Lost my Wife

    by dan sw fl
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    May GOD & some true forms of PEACE BE WITH YOU. ...

    May GOD & some true forms of PEACE BE WITH YOU.

    I don't cry even once every year it seems,
    but this news of your loss moves me to tears.

    Sincerely, Dan

    -------------------

    Take kindly...
  8. HEAT PUMP is Required in Brandon.

    HEAT PUMP is Required in Brandon.
  9. Air flow should be > 1,000 CFM . It Very Likely...

    Air flow should be > 1,000 CFM .
    It Very Likely is sufficient because A/C system SEEMS TO BE OPERATING PERFECT.

    2.5 TON Unit is operating Very Well & meeting design values.
    102'F -74'F ...
  10. Is that a knee wall to a small attic space Where...

    Is that a knee wall to a small attic space Where it says should this be cut.?
  11. S.H.G.C. = Solar Heat Gain Coefficient = a Tint...

    S.H.G.C. = Solar Heat Gain Coefficient = a Tint index

    Updated Manual J models

    Sunrooms will generally make the system requirements much more complex.


    ATTACHMENTS
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    LOAD CALC and Electric Use

    IT APPEARS THAT YOUR ELECTRIC USE FOR COOLING & HEATING IS < 50% OF THE TOTAL USE.
    ____ < 6,700 kW of the 13,411 for the last 12 months

    The high kw/hour rate tells me your electric utility is...
  13. Replies
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    What IS your MONTHLY Use for each of the last 24...

    What IS your MONTHLY Use for each of the last 24 months?

    i.e.
    If you are using $80 in the months Other than the cooling season,
    the cooling electric use would be $80 ( $160 June 2016 - $80 off...
  14. IF one has to ask, Maybe Not. ?..!..!!

    IF one has to ask, Maybe Not. ?..!..!!
  15. https://nest.com/support/pro/article/Help-with-ins...

    https://nest.com/support/pro/article/Help-with-installation-and-set-up#!

    Do you Still wish to install a NEST.?..??

    [ SOMETIMES, i t may come with Hornets].
  16. 46,900 BTU/HR ATTACHMENT

    46,900 BTU/HR

    ATTACHMENT
  17. Two Floors? Lots of windows .... Qty. 26 or...

    Two Floors?

    Lots of windows .... Qty. 26 or 41?
    U-Factor < 0.3?
    S.H.G.C. < 0.35?

    Without starting a Manual J calc.,
    I would have to guess Heat Loss might be in th range of 43,000 BTU/HR
  18. Sizing per ACCA MANUAL J & Operating Costs?

    1. NO.

    2. I would investigate CARRIER Heat Pump

    Heating dominant locale
    Heating & Cooling Degree Days
    . - - - - ATTACHMENT
  19. I believe the Total glass area would be nearly...

    I believe the Total glass area would be nearly 430 square feet.

    WINDOW TINTING Value (S.H.G.C.) and overhang lengths for South & West facing glass are needed.
    Additional tinting of South and West...
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    Heat strips are somewhat similar to Electric...

    Heat strips are somewhat similar to Electric clothes dryer operation.

    3-Ton, 2-stage Heat Pump with 10-KW (5kw* 2) total heat strips would be more than adequate
    for Central N.C. ( 3,500 Heating...
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    Is there a Question in that Statement.. ?

    Is there a Question in that Statement.. ?
  22. Replies
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    My preliminary Operating Cost analysis indicates...

    My preliminary Operating Cost analysis indicates that one using 800 gallons AT ~$2,400
    would be able to heat with a heat pump and strips for ~$750.
  23. Replies
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    DUAL FUEL IS A HUGE BENEFIT. If the system is...

    DUAL FUEL IS A HUGE BENEFIT.
    If the system is able to be very well designed and installed, the option of Heat Strips with a heat pump should be evaluated.

    N.C. has a rather mild winter...
  24. What is the "Corresponding Inside Unit ".? AHU...

    What is the "Corresponding Inside Unit ".?

    AHU - Air Handling Unit
    Carrier probably has AT LEAST a half dozen AHU options.
  25. AN INTERMITTENT A/C CONTROL ISSUE can NOT be...

    AN INTERMITTENT A/C CONTROL ISSUE can NOT be Solved via an Internet forum.

    HANDS-ON Service by Very knowledgeable Technicians = PROCESS SOLUTION
  26. HEAT GAIN ESTIMATE

    Your house might be Somewhat represented as in the Load Calc.

    ATTACHMENT
  27. A Reasonably WELL BUILT house in S FL may be...

    A Reasonably WELL BUILT house in S FL may be adequately cooled with a 4-ton system.

    I would run an independent return trunk to air handler and branch to Each bedroom. .

    How old is your...
  28. SET THE THERMOSTAT TO 75'F. The electric usage...

    SET THE THERMOSTAT TO 75'F. The electric usage may be reduced >> 30%.
  29. Calc per Manual D is probably not useful for...

    Calc per Manual D
    is probably not useful for most installed ductwork.

    Measure:
    1. Total air flow
    2. E.S.P. - External Static Pressure

    Total air flow needs to be
    1,050 CFM Minimum for ...
  30. The Rules-of-D(th)umb are applicable to a...

    The Rules-of-D(th)umb are applicable to a specific location and type of residence.
    The design process is to accurately apply the ACCA Manual J and D process
    ,,, ................. for equipment...
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    No.

    No.
  32. ACCA MANUAL J = SIZING PROCESS

    /////////////////////////////////////////////////
    2,400 SQ FOOT COLONIAL built in 1998
    Northern MA

    2.5 TON
    60,000 BTU/HR

    ATTACHMENT ...

    -------- MANUAL J -------
  33. You mean to say it is actually better to pay for ...

    You mean to say it is actually better to pay for Natural Gas instead of using "semi-free electricity" ?
  34. NEAR PERFECT ALREADY.!

    2-Ton, two Stage Heat Pump with your UA70H Dehumidifier would be Very Good selection.
    I doubt you would Actually Need a furnace. 40,000 BTU/HR modulating furnace would Much More than adequate.
    ...
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    Good windows (SHGC < 0.25, U-Factor< 0.5, V.L.T....

    Good windows (SHGC < 0.25, U-Factor< 0.5, V.L.T. > 0.45) with appropriate overhangs,
    Air Handling Unit {evaporator } + All Duct inside conditioned space,
    R- 18 Walls,
    R-30 ceiling,
    TIGHT...
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    Two zones downstairs is going to be an $,$$$...

    Two zones downstairs is going to be an $,$$$ increase.
    You may wish to pursue TRANE XR17 or similar ... about 3 ton, 2-stage downstairs.
    At 900 Square feet upstairs including an Office, the...
  37. Replies
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    I suspect that heat gains and losses could be...

    I suspect that heat gains and losses could be larger than shown in OP #1 statement.

    BASED ON PRESUMPTIONS OF:
    ... < 20 YEAR OLD RESIDENCE
    ... Eastern NC locale

    ~ 28,000 BTU/HR

    ATTACHMENT ...
  38. Replies
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    Furnace selection is obviously Very Poor. ...

    Furnace selection is obviously Very Poor.
    Cooling equipment selection is highly questionable.

    Apparently, you are in Eastern N.C. given a VERY LOW heating load (accurate ?)

    ZIP?
    Age of...
  39. We don't know any specifics about your _ THERMAL...

    We don't know any specifics about your _ THERMAL BUILDING ENVELOPE _ either UPstairs or the 1st Level.!..!!
    ----------------------------

    http://www.c2es.org/technology/factsheet/BuildingEnvelope...
  40. Upgrades: - All windows will be Low E-366, Argon...

    Upgrades:
    - All windows will be Low E-366, Argon gas, UF 0.26-0.29, SGHC <0.2, VLT 0.37 - 0.49
    - Air-tightness
    - New windows above
    - Attic air leaks (two options, need to choose between them)
    -...
  41. Replies
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    http://www.hvac.com/media/manuals/specification/BR...

    http://www.hvac.com/media/manuals/specification/BRYANT226ANA036.pdf
  42. Replies
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    47,700 BTU/HR @ 3'F with basement as noted...

    47,700 BTU/HR @ 3'F
    with basement
    as noted in ATTACHMENT
  43. Replies
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    Radically Over-sized 30+ Years Ago

    What is Your (or previous owner) MONTHLY Natural Gas use?

    60,000 BTU/HR Furnace 90% should be adequate.
    54,000 BTU/HR Output
    ~ 1,000 CFM blower capacity.
    __ :whistle: __________
    -----------
    ...
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    In cathedral ceiling area, I suspect attic...

    In cathedral ceiling area, I suspect attic temperature could Easily be 40'F > Outside.
  45. Replies
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    TOTAL AIR FLOW ___________ > 1,120 cfm? ...

    TOTAL AIR FLOW
    ___________ > 1,120 cfm?

    Window type?
    .. Blinds ?
    .. Tinted ?

    Improve window shading AND
    ... " ... duct to R-8.
  46. Replies
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    Logical Enhancement to Building Envelope and Ducts

    42,230 BTU/HR; As-Is

    Moderate Renovation : 2,100 Square Feet, 2 Story
    97'F
    75'F
    45% R.H.

    Q.sensible = 29,450 BTU/HR
    with East West windows TINTED
    and R-8 Duct in Attic
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    http://www.nwclimate.org/reviews/best-digital-humi...

    http://www.nwclimate.org/reviews/best-digital-humidity-meters/
  48. Replies
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    Typical variability might be 4%. LaCrosse Tech...

    Typical variability might be 4%.

    LaCrosse Tech has some good, Cheap hygrometers.
    However, CHEAP could mean useful life is < ~ 20 months.

    -------------------------------
    My 14 year-old ...
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    http://www3.lennox.com/pdfs/brochures/Lennox_EL296...

    http://www3.lennox.com/pdfs/brochures/Lennox_EL296E_Gas_Furnace.pdf

    What is the rated air flow for 045 furnace?
    It could be < 700 CFM.

    Given your situation,
    Without knowing the
    house size...
  50. You likely need 8 tons currently for 100'F. ...

    You likely need 8 tons currently for 100'F.

    That can be reduced to 5 tons with change in windows as stated, less infiltration and R-40 attic.
    Also, duct in attic should be R-8.

    Spray Foam on...
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