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  1. Replies
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    rater, Here's a link to the product page on...

    rater,
    Here's a link to the product page on Tamarack's website : http://www.tamtech.com/store/pressure-balancing-ashrae-energystar-hvac-air,category.asp

    Here's a quick sketch showing the...
  2. Replies
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    1,174

    jumper duct or through wall return path?

    Good morning everyone,
    I'm looking at improving the return flow from two small bedrooms in my home. For one of them, the sheet metal trunk which runs down to the air handler is just opposite the...
  3. Thread: mastic tape

    by greenjp
    Replies
    20
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    1,686

    Thanks for the advice everybody. Hardcast 1402...

    Thanks for the advice everybody. Hardcast 1402 it is.

    I spent a little time in the attic this morning to check things out. The supply and return for the 3rd floor of my townhouse are located...
  4. Thread: mastic tape

    by greenjp
    Replies
    20
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    1,686

    re. clean and dry surfaces, any hints for...

    re. clean and dry surfaces, any hints for particular cleaners or processes? Is one wet rag to wipe down and one for drying sufficient?

    jeff
  5. Thread: mastic tape

    by greenjp
    Replies
    20
    Views
    1,686

    SBKold there seems to be a terminology thing...

    SBKold there seems to be a terminology thing going on, I've been working through some confusion as well. The Hardcast website states that the 1402 tape's "sealant material" is "Modified Butyl" and...
  6. Thread: mastic tape

    by greenjp
    Replies
    20
    Views
    1,686

    Heh, unfortunately this is my "vacation" for the...

    Heh, unfortunately this is my "vacation" for the year (wife and 2 small kids out of town visiting relatives for a few weeks) and my only real opportunity to spend quality time on such projects.
    ...
  7. Thread: mastic tape

    by greenjp
    Replies
    20
    Views
    1,686

    I've heard of the paint-on mastic but have no...

    I've heard of the paint-on mastic but have no experience with it. I do have plenty of experience painting and making waffles so I might be able to handle it :)

    Hardcast lists upwards of 10...
  8. Thread: mastic tape

    by greenjp
    Replies
    20
    Views
    1,686

    Thanks for the info everybody. I read Hardcast's...

    Thanks for the info everybody. I read Hardcast's website more carefully and the stated difference between 1402 and 1403 is that the latter also lists flex duct among the applications, and it carries...
  9. Thread: mastic tape

    by greenjp
    Replies
    20
    Views
    1,686

    mastic tape

    Hello everybody,
    I'm getting ready to do some sealing around various registers, grilles, and boots in my home and am trying to settle on which tape to use. energy_rater_la extolls the virtues of...
  10. Thanks for the feedback guys. Crazifuzzy you are...

    Thanks for the feedback guys. Crazifuzzy you are correct of course about this essentially being a study of my home's system curve and the air handler's fan curve. I'm more familiar with those for...
  11. I did not consider that, thanks for pointing it...

    I did not consider that, thanks for pointing it out. Here's the order of the test. The AC hadn't been running until I started the testing:
    In one session I did:
    Fan On @ 400 CFM/ton
    80% of 400...
  12. I finally got around to taking the measurements. ...

    I finally got around to taking the measurements. I used a recently calibrated AEMC power quality analyzer with a high accuracy 5 amp range current transformer so the wattage data should be very...
  13. Replies
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    udarrell, Thanks for the info. I haven't...

    udarrell,
    Thanks for the info. I haven't reviewed psychrometric charts in a long time so this is informative. Are those cooling outputs and ratios by CFM available in literature for various AC &...
  14. Replies
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    I checked this out yesterday, and the system...

    I checked this out yesterday, and the system definitely does both Comfort-R and dehumidification on demand at the same time. That is, with both enabled it both ramped up and responded to changing...
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    I'd kicked around the idea of using that 450 cfm...

    I'd kicked around the idea of using that 450 cfm @ 3 ton setting as an in between. With the dehumidifcation active that'd net ~306 CFM - so that'd be a safe flow to run continuously?

    On one hand...
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    Yes, it's the 80k model with the 3/4 hp motor.* ...

    Yes, it's the 80k model with the 3/4 hp motor.*

    Right now the dehumidfy on demand feature is set up to turn the AC on (seems to come on when RH% is 5% higher than set point) but it's not wired...
  17. Replies
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    How low can you go? (CFM/ton)

    I have a Trane XV80 furnace, a 3.5 ton XR13 AC, 4 ton coil w/TXV, 16x25x4 filter, and a VisionPro IAQ thermostat. Question about the CFM/ton settings:

    Trane provides for a Low setting of 350...
  18. Minor update. Since I last posted, my furnace...

    Minor update. Since I last posted, my furnace started acting up. It was failing to ignite the burners at times, and at others would run for a bit but shut off before meeting the temperature set...
  19. Yes, is it that obvious? :) Part of my job...

    Yes, is it that obvious? :) Part of my job involves developing & executing test plans and procedures for energy saving technologies and processes, reporting the results, estimating power & cost...
  20. Right, Trane shows wattage vs. ESP (from 0.1 to...

    Right, Trane shows wattage vs. ESP (from 0.1 to 0.9) for the various air flow settings in heating and cooling mode of the XV80. It's in medium for both low and high stage heat, so I think I should...
  21. estimating static pressure by furnace power draw

    Good morning everyone,
    I'm pondering how to better inform my filter change intervals on my furnace. I have an 80k Trane XV80 with a 3.5 ton AC, and a 16x25 Honeywell F100 air cleaner. I do not...
  22. Replies
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    Honeywell F100 filters

    Good morning everyone,
    Have a 16x25 Honeywell F100 filter cabinet, looking at replacement filters. It presently has the MERV 11 FC100A1029. Amazon has the MERV 12 CF200A1008 for about $4 less...
  23. Could you elaborate on why you prefer the furnace...

    Could you elaborate on why you prefer the furnace timer method to the thermostat? Thanks.
  24. Replies
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    teddy bear, Want to see if you can advise on...

    teddy bear,
    Want to see if you can advise on my specific situation based on your post here. In temps from the mid-80s and up (here in MD near Washington) my AC has been keeping humidity in the...
  25. Replies
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    update

    Here's an update:
    Mark - you were correct (naturally), there was a jumper from R to O, somehow I missed it. It's there clear as day.

    The tech who came by to check out the "rumbling" upon fan...
  26. Replies
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    Mark, I'll double check the wiring but I'm...

    Mark,
    I'll double check the wiring but I'm almost certain there's no jumper to O and that I'm still seeing the profile you describe. Starts slow for a minute, then speeds up, then at the ~8 minute...
  27. Replies
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    972

    Trane XV80 & IAQ stat

    Had our system replaced last week with a 3.5 ton XR13 AC, 80k XV80 furnace, and Honeywell IAQ stat. I was reading the various manuals and looking at the settings (I am a nerd mechanical engineer and...
  28. Replies
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    558

    Does this rule apply also to the 5" thick media...

    Does this rule apply also to the 5" thick media filters? Just curious as my home's got a 16x25" filter (400 sq in) for a 3.5 ton AC unit (700 sq in requirement per that rule). Presently just have...
  29. Replies
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    Thanks. Is it for compensating for different...

    Thanks. Is it for compensating for different supply pressures or gas heating values or something?

    Is there any means to adjust the output of the furnace?

    jeff
  30. Replies
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    Gas valve adjustments

    Question about the Trane XV80 furnace. The installation manual discusses making gas valve adjustments, that the manifold outlet pressure can be decreased down to 93% from the nameplate reading -...
  31. Replies
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    Joe the same thought has crossed my mind, and it...

    Joe the same thought has crossed my mind, and it would probably be a safe way to go. It's really just a hunch on my part that's at least somewhat reinforced by the load calc (the rigor of which I...
  32. Replies
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    Just did a verbal agreement with the small...

    Just did a verbal agreement with the small company mentioned in the original post for an XR13, XV80, and I believe 4TXCB048BC3HCB coil. I believe he specified the 4 ton coil in the narrower ~17"...
  33. Replies
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    Some details on a proposals I've recieved: - For...

    Some details on a proposals I've recieved:
    - For just replacing the AC, I have quotes for the Bryant 113 and 126 models and Trane XB13 and XR13. They are all within a few hundred dollars of each...
  34. Replies
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    Had the gent out to take the measurements for the...

    Had the gent out to take the measurements for the load calculations yesterday. He measured the dimensions and arrangement of the rooms, windows and doors, jotted notes about various aspects of the...
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    beenthere - not anticipating upgrading the...

    beenthere - not anticipating upgrading the furnace beyond 80% due to costs associated with new exhaust, so you're correct that I don't see any reason at all to increase the capacity. It seems the...
  36. Replies
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    It's really been interesting talking with the...

    It's really been interesting talking with the estimators having spent some time reading this site. I'm a mechanical engineer and pretty detail oriented so the consensus here to have the manual J...
  37. Replies
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    system replacement advice

    Hello everybody,
    The original 3.5 ton, 10 SEER York air conditioner in my circa 1999 home needs to be replaced. Wasn't generating the right amount of cooling, low refrigerant pressure and leaky...
  38. Replies
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    657

    Bryant Preferred series furnaces

    Good evening everybody,
    I'm in the process of replacing the AC in my home, as the original York evaporator is leaking. System is 13 years old so I'm contemplating replacing the furnace as well. ...
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