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    DESIGN PROCESS OUTLINE

    WHAT IS THE EXISTING A/C Equipment Set-up?

    What are the current energy uses ( kw-hr PER MONTH & Oil Gallons / month or season) for the last 24 months?

    < 4,800 Heating Degree Days for DE
    <...
  2. Thread: Delta T help

    by dan sw fl
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    DT is dependent on the equipment performance, not...

    DT is dependent on the equipment performance, not the IAQ manual.

    Envelope = Interior-to-Exterior boundary

    Maximum Heating requirement is determined in an ACCA Manual J calculation.
    ...
  3. Thread: Delta T help

    by dan sw fl
    Replies
    15
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    Adjust the Honeywell Prestige IAQ t-stat to a...

    Adjust the Honeywell Prestige IAQ t-stat to a noticably Higher dT limit.
    Also, see Posts # 4 & # 7.

    T-stat is providing an Alert, Not actual control of dT.
  4. Thread: Delta T help

    by dan sw fl
    Replies
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    35'F seems to be a low dT IMO. However, we don't...

    35'F seems to be a low dT IMO.
    However, we don't know anything SPECIFIC about
    Your BUILDING THERMAL ENVELOPE nor YOUR EQUIPMENT.

    A reasonable number for dT should be determined based on
    the...
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    IS THAT ONE of the FIRST Steps in the process of ...

    IS THAT ONE of the FIRST Steps in the process of
    Texas joining the Future Unified Mexico .?
  6. ZIP _ _ _ _ _ ? Year Residence Built _ _ _ _ ? ...

    ZIP _ _ _ _ _ ?
    Year Residence Built _ _ _ _ ? | A.C.H. Natural = 0._ _ ?

    380 Sq Feet Glass total Area ?

    Blower Setting : 370 CFM/ Ton <--- dependent on ZIP.
    [ NOT APPLICABLE IN _ DRY...
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    CONCEPTUAL BLOCK LOAD

    _ |. BLOCK LOAD .|_

    Q. SENSIBLE COOLING 55,300 BTU/HR

    __________
    SW FL __ 4,000 SF __
    BUILT __ ?

    WALLS / CMU; R-5 { minimal }
    CEILING R-30
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    All air handlers in IECC Climate Zone 1 ( 7...

    All air handlers in IECC Climate Zone 1 ( 7 Counties in South Florida) will have heat strips.
    Some mid- January use may be required for a few/several days for ~ 3+ hours/day
    if one wishes to...
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    With Heating Degree Days (HDD) = ~ 600 in NE...

    With Heating Degree Days (HDD) = ~ 600 in NE Wisconsin,
    one would expect < 480 hours of operating time per year.
    __________ I.E. 70 Days @ 7 hours / day

    Appleton __________ 608 HDD
    Manitowoc...
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    There is NO HEATING Necessary in SW FL most "...

    There is NO HEATING Necessary in SW FL most " Winters ".
    ASHRAE Fundamentals data: < 44'F for < 35 hours / year

    " END of Winter " could be the last week in January.

    A/C is definitely used...
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    __ 9 tons for 4,000 Sq Feet … seems like a...

    __ 9 tons for 4,000 Sq Feet … seems like a Rule-of-Thumb selection from 1964.

    __ SOUNDS LIKE GROSSLY MISCALCULATED EQUIPMENT SELECTION
    __ or was Your Residence built prior to 1980.

    __ DAN...
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    4TTR6060J1 with TEM6AOD60H = 15.0 SEER AHRI...

    4TTR6060J1 with TEM6AOD60H = 15.0 SEER
    AHRI 8630748

    Q. Sensible COOLING 43,440 BTU/HR
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    5-TON ... _ _ _ ... I never spec a 5-ton due to...

    5-TON ... _ _ _ ... I never spec a 5-ton due to VERY HIGH Probability of Air Distribution issues.

    Straight Electric: You must be located South of 27.7' N Latitude

    System Selection to be...
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    What does the detailed ACCA Manual J ROOM-BY-ROOM...

    What does the detailed ACCA Manual J ROOM-BY-ROOM calculation indicate
    as the largest individual room air flow rate?
    Which room ?
    What is the calculated air flow rate?

    What is the calculated...
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    ...Seems like a total of FIVE STORIES 18' x...

    ...Seems like a total of FIVE STORIES

    18' x 40' = _______ 720 SQ FEET __ Ref. Post # 12
    Floors 1, 2, 3, & 4 __ * 4
    ________________ 2,880 SQ FEET
    Basement _______ ~ 400
    Total...
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    ACCA MANUAL J CONCEPTUAL

    __ BASEMENT IS Nearly ALL Underground.

    ___ 60,000 BTU/HR = Appropriate.

    EXAMPLE:
    LOAD CALC
    _______ HEATING _ 47,600 BTU/HR +/- 20% DT = 78'F

    Q. Sensible COOLING = 18,600 __ DT =13'F
  17. 90 degree Box could create 8 times more local...

    90 degree Box could create 8 times more local pressure drop
    than a proper Sweep Elbow.
  18. What do we know about your BUILDING THERMAL...

    What do we know about
    your BUILDING THERMAL ENVELOPE?

    3,000 Sq Feet
    8" MIN FOAM __ Ceiling
    It has good windows
    _________________

    What we do Not know?
  19. YOU DON.T need to be someone's Guinea PIG. ...

    YOU DON.T need to be someone's Guinea PIG.

    Start over.

    ___ ZIP _ _ _ _ _ ?

    ACCA Manuals J, S & D
    J - LOAD CALCS
    __ S - EQUIPMENT SELECTION
    ____ D - Duct Layout
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    COLD STORAGE WAREHOUSE

    https://www.convertunits.com/from/kw/to/ton+of+refrigeration

    280 kw = 79.62 tons

    1000 m^2 = 10,764 SQ FEET

    Seems like more than Adequate.

    However, Height is not provided.
    .
  21. MAU EFFICIENCY IMPROVEMENT AIR FLOW RATE...

    MAU EFFICIENCY IMPROVEMENT
    AIR FLOW RATE REDUCTION
    PROJECT BUDGET

    $ 522 / YEAR Savings 12 Condos
    ______ _____ at $0.30 per N.G. THERM

    __ Expenses __
    1. ENGINEERING
    2. Blower...
  22. Example LOAD CALC [ Post # 6 ] does Not apply...

    Example LOAD CALC [ Post # 6 ]
    does Not apply to CONCRETE BLOCK construction.

    I am not aware of the:
    1. actual R- # Walls.
    2. actual R- # Floor.
    2. A.C.H. Natural

    Also, without the...
  23. Savings based on 780 CFM MAU air flow rate versus...

    Savings based on 780 CFM MAU air flow rate versus MAU rated air flow rate
    __ = $ 43 / Year at $ 0.30 / N.G. THERM

    __ Reducing the MAU Supply Air Temperature is Not reasonable.

    __...
  24. What written FACTS were provided that indicate...

    What written FACTS were provided that indicate the
    Actual Heat Gains ?

    Current performance at ~ 100'F:
    1. Total Air Flow Rate.
    2. Supply Air Temperature
    3. Room Temperature
    4. …
    ...
  25. MAU N.G. Operating Cost

    __ BALL PARK SAVINGS

    ___ EXAMPLE CALC
    ___________________ Presume:
    ………….. 1. Existing air flow =~ Rated for MAU
    ………….. 2. Supply Temp from MAU = 70'F // feed to Hallways

    _______ $...
  26. FOLLOW The PROCESS ___________________...

    FOLLOW The PROCESS
    ___________________ https://www.acca.org/HigherLogic/System/DownloadDocumentFile.ashx?DocumentFileKey=beda9cba-ba32-38d8-fb37-e4d7cc210f56&forceDialog=0
  27. _ Define the BUILDING THERMAL ENVELOPE I...

    _ Define the BUILDING THERMAL ENVELOPE

    I wonder what, IF ANY, enhancements may actually be
    needed for a 4-ton Heat Pump System to be the Appropriate selection.

    ACCA Manual S calc is...
  28. 12 CONDOS _ 2 BEDROOMS _ ~ 1,200 SQ FT EACH ...

    12 CONDOS _ 2 BEDROOMS _ ~ 1,200 SQ FT EACH

    ASHRAE 62.2 -2013

    Required Make-Up air flow rate would be in the Ball park of 30 CFM
    after an Infiltration Credit of 30 CFM is used.

    The...
  29. Control the TIMING AND AMOUNT of exhaust air from...

    Control the TIMING AND AMOUNT of exhaust air from EACH Condo.

    ASHRAE STD. 62.2 - 2013
    ___ Understand & Use the INFILTRATION CREDIT _ _ from data provided by a BLOWER DOOR TEST

    For example, ...
  30. ENERGY ESTIMATE

    __ 1985 Built // 2,100 Sq Feet // Piedmont NC

    _ REF.: ASHRAE FUNDAMENTALS, CHAPTER 14,
    _____________CLIMATIC CONDITIONS, 2017
    _ HDD 3,533
    _ CDD 1,454

    A NORMAL Heating & Cooling...
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    LOW RETURN with a proper Filter grille set-up ...

    LOW RETURN with a proper Filter grille set-up
    would Not have more than normal issues
    with the duct interior.

    ___
    RE: Post # 7

    SPRAY PAINT / Welding ROOM with PROPER VENTILATION
    should...
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    __ Post # 11 __ Your billing is quite...

    __ Post # 11 __

    Your billing is quite difficult to comprehend at-thi$-point.

    … Co-Op, regular public utility, $ 0.22 OR $ 0.11 / KW-HR
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    ACTUAL ELECTRIC USE / kw-hrs per Month is needed,...

    ACTUAL ELECTRIC USE / kw-hrs per Month is needed, not a Flat budget.

    Heat Pump would be about 70% less for heating than Straight Electric

    $ 300 / month

    Example:
    $ 120 / month Other...
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    ASHRAE CLIMATIC DATA HDD 65 Annual 2,667 ...

    ASHRAE CLIMATIC DATA HDD 65 Annual 2,667

    JAN FEB MARCH APR MAY Jn Jy A SEPT OCT NOV DEC
    671 516 316 _ 118 27 _ 0 _ 0 _ 0 _ 3 125 380 511

    CDD 65 1,892 annual
    ______________ May...
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    Defining BUILDING THERMAL ENVELOPE per

    ALABAMA BUILDING CODE

    I Understand
    2006 IECC applies to a 2010 build
    https://www.energycodes.gov/sites/default/files/becu/2006_iecc.pdf

    Climate Zone 3

    R-13 Walls
    R-30 Ceiling
  36. Replies
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    70 kw-hrs / DAY * 365 DAYS = 25,600 KW-HOURS … =...

    70 kw-hrs / DAY * 365 DAYS = 25,600 KW-HOURS … = ~ 2.7 x NATIONAL AVERAGE.

    March, April, early May, late October, November & early December should Not have
    High electrical power requirement...
  37. Post # 7 BLUE SCRIPT : 1,800 Sq Ft Living Area ...

    Post # 7 BLUE SCRIPT : 1,800 Sq Ft Living Area
    __ ____________ AND _ 1,800 Sq Ft Basement / Two sides exposed to air

    with very limited BUILDING THERMAL ENVELOPE Description
    ___ 1999...
  38. REASONABLE IS not Present Here

    IT IS DIFFICULT-TO-IMPOSSIBLE to make a realistic, reliable recommendation
    unless THE DESIGN PROCESS AND EQUIPMENT SELECTION PROCEDURES ARE FOLLOWED.

    I WOULD NOT MAKE A SUGGESTION at-this-point...
  39. WITH MY Limited use of HOT WATER, IT MAY TAKE...

    WITH MY Limited use of HOT WATER,
    IT MAY TAKE 60+ YEARS for any ROI.

    DO YOU KNOW your existing use ?

    Do you plan to ditch the boiler?

    ...
  40. NORMAL TEMP = 69'F ______ SET BACK SHOULD BE...

    NORMAL TEMP = 69'F
    ______ SET BACK SHOULD BE LIMITED TO 65'F

    YOUR LOCAL Temperature BIN DATA should be used to determine actual Energy Use
    given your BUILDING THERMAL ENVELOPE and BOSCH...
  41. BOSCH IDS 2.0 BOVA PRODUCT INFORMATON

    ~ 4 KW per Table 9 … Seems to correlate
    ______________ with your power tracking for the 5 Ton system.

    ...
  42. 1410 CFM

    MORE SPECIFIC GUIDANCE / GOAL

    ___ EXAMPLE : ESP 0.69"
    _____________

    ... = SUPPLY + RETURN = TOTAL
    TEL = __ 286 + __ 98 = __ 384 .:. 0.05" / 100 FEET


    34,400 BTU/HR Q. Sensible...
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    ZIP _ _ _ _ _ Age of Residence __ Built in...

    ZIP _ _ _ _ _

    Age of Residence __ Built in 2002 or _ _ _ _ ?

    ACCA Manual J Room-by-Room calc is the method
    to pursue to determine required air flows to each area.

    Duct size: Provide...
  44. Duct Board is not limited to FLORIDA _ " ___ "...

    Duct Board is not limited to FLORIDA
    _ " ___ " _ " __" __ " __ " _ Residential

    ___ ___ ___ SUPER DUCT RC...
  45. The EL of each duct fitting/ component should be...

    The EL of each duct fitting/ component should be < 35.

    60' x 30' perimeter
    ____ _ _ _ It should actually be Quite Difficult to build a Supplt Air duct system with > 300 TEL.
    ____ _ _ _ ...
  46. AHJ ?

    Google
    1. TOLCO Seismic Restraint Systems Guidelines
    2. SMACNA Seismic Manual
    ... …
    ____ and your National, State, County, LOCAL Building Code(s), as applicable.

    Quite difficult to...
  47. RULES FOR EACH HALF-DECADE or So + per Quality Built

    NO One Here Wishes to use the RULES-OF-THUMB for A/C SIZING.

    I would definitley review them in the CONCEPTUAL DESIGN PHASE.

    _ A.K.A. _ BALL PARK ESTIMATING ...

    I.E. ... RULES...
  48. A.C.H. NATURAL IS NEEDED. AIR CHANGE PER HOUR...

    A.C.H. NATURAL IS NEEDED.

    AIR CHANGE PER HOUR

    Reference: BLOWER DOOR TEST Procedure & Results
    _________ ------------------------
    https://www.energy.gov/energysaver/blower-door-tests
    ...
  49. WHY does your house Ever require > 1,100 CFM? ...

    WHY does your house Ever require > 1,100 CFM?

    DO YOU set your thermostat to < 74'F in the Summer?

    Analysis of your Monthly electric and natural gas use provides VALUABLE SIZING GUIDANCE....
  50. Simplifiied ... .:. +/- 33%

    ACCA MANUAL J
    ____ SIMPLIFIED __ As an Initial Thought.

    To be THOROUGHLY Verified BY OWNER
    __ WITH ROOM-BY-ROOM CALC & PER ZONE

    Gmail address: RACINGDAN11
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