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  1. Replies
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    Operating cost using LP Gas is likely about 3 X...

    Operating cost using LP Gas is likely about 3 X as expensive as electricity.
    Presuming that the electricity is not subject to a California TIERed cost structure.

    Do you use < 700 gallons of LP...
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    Propane at $3.69/gallon Electricity at $0.20/kWh...

    Propane at $3.69/gallon
    Electricity at $0.20/kWh

    IF YOU Want to make a FACTS DRIVEN decision,
    I can provide the equipment selections and operating costs.


    https://www.mysimplifiedhvac.com...
  3. https://files.climatemaster.com/97b0075n16-climate...

    https://files.climatemaster.com/97b0075n16-climatemaster-commercial-tranquility-22-tz-series-water-source-heat-pump-installation-manual.pdf
  4. https://files.climatemaster.com/lc984-climatemaste...

    https://files.climatemaster.com/lc984-climatemaster-commercial-tranquility-22-digital-high-efficiency-tz-submittal.pdf

    Page 21

    [ Page 22- Full Load ]

    Performance Data – TZ H/V 060 (Part...
  5. ALL COOLING UNITS … NOT ONLY multi-head...

    ALL COOLING UNITS

    … NOT ONLY multi-head equipment

    … multi-head may have a larger reduction

    Rated cooling load is NEVER the same as operating load.
    Rated cooling load is based indoor...
  6. There should be NO CONFUSION when one realizes...

    There should be NO CONFUSION when one realizes that a complete, reasonable
    ACCA MANUAL S Calculation is ONE of the State Building Code REQUIREMENTS.
    ...
  7. Replies
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    Is the plenum in Conditioned Space? If NO, is...

    Is the plenum in Conditioned Space?

    If NO, is the attic/ or garage air temperature > 140'F?

    Is the Supply Air temperature < 55'F?
  8. __ THE DEVIL IS IN THE DETAILS IF one does...

    __ THE DEVIL IS IN THE DETAILS

    IF one does not know the details,
    one won't recognize THE DEVIL is Lurking nearby.
  9. Replies
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    Could the tech tell just by ' looking at it'...

    Could the tech tell just by ' looking at it'
    what the air flow rate is and judge it as properly adjusted ?
  10. Replies
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    Mfg. _______ Condenser model # _______ Air...

    Mfg. _______
    Condenser model # _______
    Air Handler model # __________

    WHAT is the total air flow rate?

    ___ … 360, 400 or 430 CFM/ Ton ?

    What is the Relative Humidity in the Room /...
  11. MXZ-3C30NA2 ___ ___ ___ 9 + 9 + 15 ___ ___ ___...

    MXZ-3C30NA2
    ___ ___ ___ 9 + 9 + 15
    ___ ___ ___ 33

    ___ 29,600
    ____ ____ 8,300 + 8,300 + 13,000
    ...
  12. Replies
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    Initial Thoughts - Scoping Calculation

    Details of the BUILDING THERMAL ENVELOPE
    are quite sketchy / vague.

    Q. Sensible=30,000 BTU/HR +/- 27%.

    ZIP _ _ _ _ _
    Built 19 _ _ ??
    _______ 2-story __ ??

    Air Handler Location ___ ?
  13. I do NOT see any reasonable savings in changing...

    I do NOT see any reasonable savings in changing to a Heat Pump
    with very low WINTER Natural Gas rate.
    _________ $ 31 per heating season ___

    Effective electricity rate = ~ $0.085 / kwhr
    for...
  14. Replies
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    https://www.mysimplifiedhvac.com Previous post...

    https://www.mysimplifiedhvac.com

    Previous post was misspelled.
  15. Replies
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    1,250 Sq Feet / Ton would VERY RARELY BE Adequate...

    1,250 Sq Feet / Ton would VERY RARELY BE Adequate
    on a 5,000 sq foot, 20+ year old residence at 95'F ODT.

    I am do not know why the 90,000 BTU/HR heating would be inadequate.

    ___
    OP...
  16. Replies
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    CALL for Service. Notes 1) & 2) IF...

    CALL for Service.

    Notes 1) & 2)


    IF there is No Power to the transformer,
    how could the fuses blow on the input lines TO the transformer.

    Obviously, There IS power in the input lines.
  17. Replies
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    _ ONLY built to code. _ So, ____ WHERE IS[are]...

    _ ONLY built to code.
    _ So,
    ____ WHERE IS[are] the PVC Pipe Union[s] that enables disassembly?
    ...
  18. Replies
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    -------- from Post # 1, Question # 3 of this...

    --------
    from Post # 1, Question # 3 of this thread

    And if I go single stage, then they'll put in ONE thermostat + sensor,
    redo the controls for one zone, remove the bypass damper/duct...
  19. Replies
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    Is the 3-Ton system the optimum size for Heating...

    Is the 3-Ton system the optimum size for Heating or Cooling?


    Zone 4
    _______ 2-Stage ought to be sufficient IF residence < 30 years old + Western NC
    _______ Set-up at ~ 350 CFM per ton + 72'F...
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    It might not be "so bad", if it is set on the...

    It might not be "so bad", if it is set on the Lowest air speed.

    WHAT SPECIFIC SMALLER ONE ?
    ____ _ Do You mean a 6,000 BTU/HR window mounted unit [ a.k.a. " Window Shaker" ]..???

    Probably,...
  21. Replies
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    FIX THE DUCT WORK Use ACCA Manual D...

    FIX THE DUCT WORK
    Use ACCA Manual D calculation to provide guidance.

    https://www.mysimplifiedhvac.com

    ... OR per YOUR Recommendation PROVIDE A BAND-AID
    ____________ ____________ ___...
  22. Replies
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    __ LOOSE ASBESTOS = a Killer obviously. ...

    __ LOOSE ASBESTOS = a Killer obviously.

    https://en.wikipedia.org/wiki/Asbestos

    Despite the severity of asbestos-related diseases, the material has been widely used all over the world,
    and...
  23. Replies
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    How did you lift it By Yourself?

    How did you lift it By Yourself?
  24. Pressure Drop across a filter is determined...

    Pressure Drop across a filter
    is determined based on the
    _ FILTER FACE VELOCITY.

    Select filter area which maintains < 250 FPM
    +++++++++++++++++++++ Feet Per Minute

    < 0.1" w.c. for 2"...
  25. RESIDENTIAL Application CLEAN 0.10" WATER...

    RESIDENTIAL Application

    CLEAN 0.10" WATER COLUMN
    DIRTY_ 0.19"

    Magnahelic Gauge _ MANUAL
    __ DWYER model 2001
    ...
  26. Replies
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    Not much less than FULL LOAD … 70% TO 90% of...

    Not much less than FULL LOAD …
    70% TO 90% of RLA [ not 50%]
    __________________

    WAGNIR Estimate

    Normal ___ 12.56 ___ 12.56 A_at 230 V
    _ partial ___ 85% ___ 96%
    PARTIAL 10.47 A __...
  27. Replies
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    2 to THREE Times the weight of a modern oil...

    2 to THREE Times the weight of a modern oil furnace.
  28. Replies
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    Examples: ...

    Examples:

    https://www.grainger.com/category/material-handling/mounts-and-vibration-control/floor-mount-vibration-isolators?attrs=Item%7CFloor+Mount+Vibration+Isolator&filters=attrs

    MASON...
  29. Thread: Good System?

    by dan sw fl
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    - Age of house: 15 years, Built 2005 - ZIP:...

    - Age of house: 15 years, Built 2005
    - ZIP: 66049

    - Total Square Feet: 4,400 -- Main level: 1,570 -- Second Level: 1,863 -- Basement: 1,000

    OP to verify Manual J calculation input values....
  30. Replies
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    https://www.energystar.gov/ia/home_improvement/hom...

    https://www.energystar.gov/ia/home_improvement/home_contractors/qispec.pdf

    My house is a single story 1800 square feet built in 1951

    (plus a basement where furnace and duct access is good, no...
  31. Thread: Good System?

    by dan sw fl
    Replies
    14
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    3,433 Sq Feet for A/C Load Basement is...

    3,433 Sq Feet for A/C Load

    Basement is presumed > 80% Underground.

    Windows Orientation Presumed
    West _ 7
    East __ 5
    South __ 4
    North ___ 3
  32. Thread: Humidity

    by dan sw fl
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    How much infiltration? ____ A.C.H. Natural

    How much infiltration?
    ____ A.C.H. Natural < 0.3 or > 0.7
    _____ House built in 2010 or 1910 ?

    Is the total air flow rate 880 cfm or 1,100 cfm?

    Do you live in Houston, Phoenix or...
  33. Replies
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    ASHRAE Fundamentals - 2017 99% __ 24'F 1%...

    ASHRAE Fundamentals - 2017

    99% __ 24'F
    1% ___ 92.5'F /75.0'F

    1% .. exceeded for < 90 hours per year

    Heating Degree Days 3,208
    Cooling Degree Days 1,685
  34. Replies
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    WHY would the dehumidifier operate at < ~65'F...

    WHY would the dehumidifier operate at < ~65'F outside air?
    ___ ~ October to ~April

    The dehumidifier may be isolated ( by-passed)
    with manual dampers for the ~ 6+ month Heating season.
  35. _________ Cooling Year ___ Sq Ft / Ton 1950...

    _________ Cooling
    Year ___ Sq Ft / Ton

    1950 ___ 400
    1970 ___ 500
    1990 ___ 600
    2000 ___ 700
    2010 ___ 800
    2020 ___ 900
    ___________ or something similar
  36. https://en.wikipedia.org/wiki/Grants_Pass,_Oregon#...

    https://en.wikipedia.org/wiki/Grants_Pass,_Oregon#Climate

    https://www.mysimplifiedhvac.com
  37. WHAT BENEFITS, if any, does one envision in...

    WHAT BENEFITS, if any, does one envision in attempting to
    downsize to a 1.5 ton?

    Minimal SPECIFIC information was mentioned
    on the BUILDING THERMAL ENVELOPE
    other than the duplex is 18 years...
  38. Replies
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    The question that I have is do I need to...

    The question that I have is
    do I need to install a damper on the return side as well?

    Correct, dampers are not generally provided on returns.

    Our house was built around 7 years ago and ...
  39. Replies
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    Path D ( Outside Air) may by-pass the...

    Path D ( Outside Air) may by-pass the dehumidifier when the
    ODT < 66'F.
  40. Replies
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    Fresh air is continuous IF the amount is ~ 50 CFM...

    Fresh air is continuous IF the amount is ~ 50 CFM
    as recommended in ASHRAE 62.2
    and state building codes.

    Any advantage of running the ERV in the summer is minimal
    except for the IAQ benefit.
  41. Replies
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    ERV Operating cost / benefit discussion

    You do Not need an improved ERV.
    The total energy recovery efficiency in cooling mode might be ~50% instead of 34% for an alternate selection.

    Additional savings per year might be $18 - $30...
  42. Replies
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    ACCA STANDARD 5 __ HVAC QUALITY INSTALLATION SPECIFICATION

    https://www.energystar.gov/ia/home_improvement/home_contractors/qispec.pdf

    SECTION 5.1.1
    A) NEW CONSTRUCTION
    i. < 10%. 25 PASCALS
    ii. < 6%
  43. Replies
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    Help step # 1 - ACCA Manual J Do you reside...

    Help step # 1 - ACCA Manual J

    Do you reside in the United States ?
    If Yes, ZIP = _ _ _ _ _

    Square Feet / Floor: 1. ___________ 2. ___________

    # & type of windows
    Age of...
  44. Replies
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    Basis: Typical 2008 TX Construction __...

    Basis: Typical 2008 TX Construction
    __ Chessppie123, Did you check the input values of Whole House Load Calculator?

    2-Ton, single stage should be adequate FOR A ONE ZONE System

    __ Q....
  45. Replies
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    Alternatives IN HVACR ARE SEVERAL … ___________...

    Alternatives IN HVACR ARE SEVERAL …
    ___________ … INDUSTRIAL, COMMERCIAL, RESIDENTIAL, ...

    https://phcc-wi.org/wisconsin-licensing-laws/
    ...
  46. Replies
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    Basis: Typical 2008 TX Construction 2-Ton,...

    Basis: Typical 2008 TX Construction

    2-Ton, single stage should be adequate FOR A ONE ZONE System
  47. Thread: Good System?

    by dan sw fl
    Replies
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    I WOULD NOT USE A FIVE TON System. Very...

    I WOULD NOT USE A FIVE TON System.

    Very likely that the air flow rate would not be adequate.

    Post your ACCA Manual J calculation which
    shows > 50,000 BTU/HR is necessary at realistic design...
  48. Replies
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    COST BENEFIT ?

    What is the R.O.I. on the proposed ERV ?

    NOTE: ERV Model VNT5150E

    _______ TOTAL RECOVERY EFFICIENCY = 34%

    https://s3.amazonaws.com/s3.supplyhouse.com/product_files/VNT5150E1000Sub.pdf
  49. Replies
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    https://www.mitsubishicomfort.com/products/outdoor...

    https://www.mitsubishicomfort.com/products/outdoor-units/multi-zone-cooling-and-heating/compare

    . Hyper Heat
    MXZ-3C24NAHZ2
    MXZ-3C30NAHZ2
  50. Replies
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    15,200 BTU/HR at 88'F 23,200 BTU/HR at 0'F ...

    15,200 BTU/HR at 88'F

    23,200 BTU/HR at 0'F

    ____ Check the input.!
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