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  1. Replies
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    Design conditions 88'F / 72'F Wet Bulb ONLY 400...

    Design conditions 88'F / 72'F Wet Bulb
    ONLY 400 Cooling Degree Days

    I don't understand where dehumidification would be a Significant issue in Toronto.

    Basement only for a few/several weeks?
  2. With R-9 walls, 3-ton CARRIER GREENSPEED (Bryant...

    With R-9 walls, 3-ton CARRIER GREENSPEED (Bryant EXTREME) and reducing the infiltration to half,
    your electric bill for heating would be ~$900 based on 5,300 Heating Degree Days (HDD) {average of...
  3. With R-9 walls, 3-ton CARRIER GREENSPEED (Bryant...

    With R-9 walls, 3-ton CARRIER GREENSPEED (Bryant EXTREME) and reducing the infiltration to half,
    your electric bill for heating would be ~$900 based on 5,300 Heating Degree Days (HDD) {average of...
  4. http://www.oldhouseweb.com/blog/adding-wall-insula...

    http://www.oldhouseweb.com/blog/adding-wall-insulation/
  5. Based on the above thermal properties that I have...

    Based on the above thermal properties that I have assumed,
    the calculated Heat Loss is
    MORE THAN TWICE
    what I would anticipate for a house about 20 years old.

    Amount of oil used is critical...
  6. ALTERANTE: BRYANT EXTREME or Carrier...

    ALTERANTE:
    BRYANT EXTREME
    or Carrier GREENSPEED

    ...... require ductwork,
    so high end mini-split might be your selection

    You could investigate to determine that a _heat pump sized for...
  7. Replies
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    Air leakage close to the t-stat?

    Air leakage close to the t-stat?
  8. Replies
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    282

    Balance the air. Eliminate the negative...

    Balance the air.
    Eliminate the negative pressure, if any.
  9. Thread: Hot bedroom

    by dan sw fl
    Replies
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    304

    What is temperature with the door OPEN? Closed?

    What is temperature with the door OPEN?
    Closed?
  10. So now that the heat pump are (or seem to be)...

    So now that the heat pump are (or seem to be) working properly,
    you may expect your Maximum electric bill (for HEAT) to be less than ~$350 per month
    if your are in a region where Heating Degree...
  11. Replies
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    "Coastal" _ < 3 miles direct from Gulf of Mexico....

    "Coastal" _ < 3 miles direct from Gulf of Mexico.

    Salt environment on East cost of Fl is about 20 X worse than West coast.
  12. Replies
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    APPARENTLY you're READY to accept Full...

    APPARENTLY you're READY to accept Full responsibility when You restricted air flow upstairs
  13. Replies
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    ?? ... appears to be < 30% _____________________...

    ?? ... appears to be < 30%
    _____________________ More evidence of possible duct leakage

    Root Cause of this condensation issue remains illusive.

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

    In the...
  14. Replies
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    514

    How do you install a dehumidifier " in your...

    How do you install a dehumidifier " in your utility room"?

    A so-called FL ulility room is normally ( > 3/4 of the time) Either the Attic or Garage.
  15. Replies
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    Keep the air in the duct > 41'F AND the...

    Keep the air in the duct > 41'F
    AND the
    Relative Humidity in the House < 36%.
    _________ :eek2: _________________

    T-stat set at 70'F.

    Alternate
    . Set air handler to run intermittently...
  16. Replies
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    316

    I believe that MFG rebates for New Construction...

    I believe that MFG rebates for New Construction are quite limited in comparison to Replacements.
  17. Replies
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    229

    $0.08 / sq foot for Heat Loss if scalable...

    $0.08 / sq foot for Heat Loss if scalable drawings,
    current energy usage per month
    and
    thermal building envelop information are provided

    $0.10 / sq foot for duct design
    ... so that the...
  18. Replies
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    301

    http://www.acca.org/standards/acca-speed-sheets/

    http://www.acca.org/standards/acca-speed-sheets/
  19. Replies
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    http://www.lowes.com/pd_42864-236-263065_0__?produ...

    http://www.lowes.com/pd_42864-236-263065_0__?productId=3057515

    seems to be a band-aid
  20. Replies
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    301

    Is there any reason not to wait until 2020 to...

    Is there any reason not to wait until 2020 to purchase new equipment?

    What is your Heat Loss at 28'F?
    Will Back-up heat be natural gas or heat strips?
    ...
  21. Replies
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    1,228

    First things- FIRST ... DUCT PRESSURE TEST ...

    First things- FIRST ...

    DUCT PRESSURE TEST
    ... at least I.M.O.

    ... identify Any and All leaks.
  22. Sizing from here [ remote] = 3.5 Ton

    Sizing from here [ remote] = 3.5 Ton
  23. A simplified rule-of-thumb can always be easily...

    A simplified rule-of-thumb can always be easily debunked.

    Contractor # 2 is quite Lazy in determining ( = Guessing) furnace size.
  24. x Everything I have reviewed here [without...

    x
    Everything I have reviewed here [without performing a formal heat gain calculation]
    makes me believe that 3.5 ton system is appropriate size.

    Summer use is < 1,000 kW-Hr ( ~ $100 / month)...
  25. OPERATING COST COMPARISON ...

    OPERATING COST COMPARISON

    http://www.electricrate.com/residential-rates/connecticut/
    $0.1263 / kw

    http://www.eia.gov/dnav/ng/hist/n3010ct3m.htm
    $1.30 / therm average in Winter

    I wouldn't...
  26. Replies
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    Very Reasonable assumption to make comparisons.

    Very Reasonable assumption to make comparisons.
  27. What is your current Electric Usage per month for...

    What is your current Electric Usage per month for the last 24 months?

    Do you set the thermostat to 77'F.?

    Age of house?
    How many windows/sliding glass doors on each side of house?

    What is...
  28. Do you live in the Puerto Rico? Or .... You...

    Do you live in the Puerto Rico?

    Or ....
    You didn't mention that ANY Heat is necessary.
  29. Replies
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    http://www.vfds.org/vfd-savings-calculator.html ...

    http://www.vfds.org/vfd-savings-calculator.html

    http://www.fpl.com/business/energy_saving/pdf/br_air_cooled_primer.pdf

    If you are running LARGE equipment at less than half cooling loads, the...
  30. Replies
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    Does heat pump run > 70% of the time when it's

    Does heat pump run > 70% of the time when it's < 40'F outside?
  31. Replies
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    http://www.perryheatingandcooling.com/knowledge.ph...

    http://www.perryheatingandcooling.com/knowledge.php


    http://www.idesignac.com/get-educated.php


    http://www.hamstrahvac.com/
  32. http://en.wikipedia.org/wiki/Gas_meter#mediaviewer...

    http://en.wikipedia.org/wiki/Gas_meter#mediaviewer/File:Gas-Meter-1785.jpg
  33. Replies
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    Air-source is obviously quite limited for your...

    Air-source is obviously quite limited for your locale.

    http://www.geokiss.com/consumer-info/HowG&WSourceHeatPumpsWork.pdf

    https://www.climatemaster.com/commercial-watersource
  34. Replies
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    http://www.fantech.net/FR-200_enus-411336.aspx ...

    http://www.fantech.net/FR-200_enus-411336.aspx

    35% may be a more appropriate target at < 30'F outside.
    25% ..............................................at 0'F
    ...
  35. Based on Quite low run times at ~ 20'F, it...

    Based on Quite low run times at ~ 20'F,
    it appears that the furnace is in the range of 3 X Too Large.

    Furnace might be 100,000 BTU/HR and heat loss about 30,000.

    One might guess that a 1970...
  36. Filter could be 24" x 24" x 5 inch DEEP and MERV...

    Filter could be 24" x 24" x 5 inch DEEP and MERV 7 maximum

    PURPOSE of the filter is to keep the COIL Clean.
  37. Replies
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    You will VERY Likely NOT be able to reach 1411...

    You will VERY Likely NOT be able to reach 1411 CFM on that speed setting.

    http://icpindexing.toddsit.com/documents/086477/51811220104.pdf

    What are the Filters dPs ..
    Clean: 0.09"
    Dirty _...
  38. IT ABSOLUTELY DOES, IF the HOME-OWNER provides...

    IT ABSOLUTELY DOES,
    IF
    the HOME-OWNER provides
    .......................... _THE APPROPRIATE_ Building Thermal Envelop and Historical Energy Use information.

    Of course, one has to have some...
  39. NEED TO RE-EVALUATE _R E A L_ CAPACITY REQUIREMENT

    Keep It Simple:

    2-Ton Heat Pump with two 3-kw heat strips
    ______________ 4,400 Heating Degree Days (HDD) in Northern VA

    14'F Design Temperature per ASHRAE

    Heat Pump will provide > 80%...
  40. Load Calc is _a Farce_ or ONLY An Example if you...

    Load Calc is _a Farce_ or ONLY An Example if you will.
    It HAS NOTHING to do with Reality.
  41. Replies
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    152

    http://www.thermastor.com/Ultra-Aire-XT105H I...

    http://www.thermastor.com/Ultra-Aire-XT105H

    I sent Contractor RECOMMENDATION in an E-MAIL.
  42. Replies
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    No MORE so than Trane/ American Standard,...

    No MORE so than Trane/ American Standard, Carrier/Bryant or Lennox/ ...
  43. 4th one on the list ...

    4th one on the list

    http://www.warmingupcanada.hvacrheritagecentre.ca/index.php/technologies-eng/fournaise_central-central_furnace-eng.html#a4
  44. http://www.consumeraffairs.com/homeowners/goodman-...

    http://www.consumeraffairs.com/homeowners/goodman-manufacturing.html
  45. An appropriate response would involve the SYSTEM...

    An appropriate response would involve the SYSTEM PERFORMANCE involving more than a dozen parameters, not a brand evaluation.
    ...
  46. ONE SYSTEM Basement should be one zone. First...

    ONE SYSTEM
    Basement should be one zone.
    First Floor should be one zone.
    = 2 zones on 1 system
  47. CARRIER ...

    CARRIER

    http://catalog.dcne.com/catalog/WebCatPageServer.exe?PROD_FULL&ProdInfo=00004000001


    LENNOX

    http://www.lennox.com/products/furnaces/SLP98V/

    IT DEPENDS
  48. 55,000 BTU/HR for 2,800 S.F.. @ 0'F

    60,000 BTU/HR Furnace _might be_ Adequate.

    Two-stage should be investigated.

    Heat Loss is calculated in the range of 55,000 BTU/HR (Attachment)
    BASED ON
    2,800 Sq Feet
    30 years old
    Great...
  49. They don't call it WAR RANT Y for No reason.

    They don't call it
    WAR RANT Y for No reason.
  50. IN Addition, Measure the CO continuously ...

    IN Addition,

    Measure the CO continuously

    with an AUTO low ( 20 ppm) alarm setpoint.

    http://www.amazon.com/ProTech-8505-Commercial-CO-Monitor/dp/B000JVQVFS
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