Search:

Type: Posts; User: JoeSix

Page 1 of 4 1 2 3 4

Search: Search took 0.01 seconds.

  1. Dehumidifier repair in Atlanta, GA area? (Thermastor Santa Fe Advance)

    I have a Santa Fe Advance with a leaking evaporator/condenser coil (it's a combined unit). The coil combination is under warranty and Thermastor would ship a replacement on request, but I can't find...
  2. UPDATE: I contacted a Carrier dealer, and they...

    UPDATE: I contacted a Carrier dealer, and they get this question frequently and indicated that with the Infinity you can pretty much set the thermostat as low as it will go (which is 40F) and that...
  3. (Oops - you'd probably have to have the condenser...

    (Oops - you'd probably have to have the condenser model to know for sure -- it's a 25HPA6)
  4. Not sure -- in this case it's a "communicating"...

    Not sure -- in this case it's a "communicating" condenser and I've been told the Infinity control actively manages the defrost cycle. Maybe a Carrier expert here would have the specifics?
  5. Ah, good point -- seems like at least a good...

    Ah, good point -- seems like at least a good reason not to set the indoor temp lower.

    (On the other hand though, 45-50F outdoors is wonderful for getting heat to the indoor coil, so I'd think...
  6. OK for heat pump to run non-stop for days? (colder climate)

    I have a small home recently built that is largely unoccupied during the winter, and I have the heat set on 50F when I'm not there. (Heat pump is 2-ton, 2-stage, 2-zone Infinity heating about 1350...
  7. Replies
    3
    Views
    508

    Be sure to get a load calc -- that's a lot of...

    Be sure to get a load calc -- that's a lot of solar exposure via those windows depending on which direction the home will face.

    Also, if the duct work is between the floors, then you're really...
  8. Replies
    22
    Views
    2,071

    It is (R-8 flex), I just wasn't worried about...

    It is (R-8 flex), I just wasn't worried about heat loss/gain from reduced velocity since it's in conditioned space.

    (To Todd S -- it's not all that bad, just this one supply. It's mainly done...
  9. Replies
    22
    Views
    2,071

    Fortunately, the ducts are basically in...

    Fortunately, the ducts are basically in conditioned space, so hopefully that will eliminate heat transfer as being a significant factor.

    If the elbows stay, they'll definitely be replaced with...
  10. Replies
    22
    Views
    2,071

    We're into the intial install phase and the...

    We're into the intial install phase and the system is not powered yet, but it's by far the most difficult supply register to get air to in the entire system. Even "as the crow flies", with a minimum...
  11. Replies
    22
    Views
    2,071

    It's not so much that they are "stronger" in the...

    It's not so much that they are "stronger" in the center, just that the portion near the center doesn't have much bearing force to transfer to ends. If you think about it, it makes sense -- each end...
  12. Replies
    22
    Views
    2,071

    Fortunately, there is only 1 hole in each TJI at...

    Fortunately, there is only 1 hole in each TJI at this point, just over the minimum 5' distance from one bearing side. Where the rerouting is required would be about 3' further away.

    (Originally,...
  13. Replies
    22
    Views
    2,071

    You're right on target. Anyway, the HVAC...

    You're right on target.

    Anyway, the HVAC contractor has acknowledged the mistake -- it was supposed to be a straight run and this was not properly communicated to the duct crew. I'm really...
  14. Replies
    22
    Views
    2,071

    Move duct and repair TJI's or live with it?

    This is more of a construction topic than specifically HVAC, but I thought there might be some knowledgeable folks here.

    Through miscommunication or whatever, one of my more challenging but also...
  15. Is it really as simple as looking at the...

    Is it really as simple as looking at the "efficiency" of the heat pump itself? At 17F, even if the COP is still 2.5, the heat pump is putting out a good deal less heat than at 47F.

    If the output...
  16. The house is in Macon County, NC. I haven't seen...

    The house is in Macon County, NC. I haven't seen the code, but if you have more than one floor, separate systems or zoning are required (depending on square footage and intended use). I thought this...
  17. Replies
    24
    Views
    1,953

    Some folks in my area heat and cool 2000 sq feet...

    Some folks in my area heat and cool 2000 sq feet with just 2 tons (88F summer, 5F winter)
  18. IMHO, one of the cool things about a variable...

    IMHO, one of the cool things about a variable speed (ECM) blower is that as long as you are within the static pressure limits of the blower, it blows the right amount of CFM (at least if you have...
  19. Replies
    18
    Views
    1,553

    Maybe it's a coincidence, but you checked the A/C...

    Maybe it's a coincidence, but you checked the A/C mode with a 10 degree temperature differential and the heating mode with a 16 degree temperature differential. No wonder there was a difference.
    ...
  20. Replies
    7
    Views
    1,582

    Two stage systems are very nice, but the price...

    Two stage systems are very nice, but the price differential seems a little high based on some quotes I recently received on Carrier equipment (same parts source as Bryant I have been told)
  21. Replies
    17
    Views
    1,618

    Dunno if it's still available, but I remember...

    Dunno if it's still available, but I remember Trane having a 2-stage 40K BTU furnace. It put out just over 20K BTU on low fire -- would have been perfect...
  22. Replies
    32
    Views
    3,252

    Issues with the contractor aside, you really need...

    Issues with the contractor aside, you really need a two-stage stat to get the most out of your two-stage furnace.

    You lose most if not all of the benefit of having two separate stages otherwise. ...
  23. Thanks for all the helpful replies. I could tell...

    Thanks for all the helpful replies. I could tell from posts here previously that Infinity zoning was well thought of. (I guess now I know where the name comes from).

    The house is actually really...
  24. The above posts regarding cfm reminded me of a...

    The above posts regarding cfm reminded me of a question I wanted to ask.

    If only 1 zone is calling for cooling, and the compressor is on low, what cfm would you expect the system to instruct the...
  25. Thanks. So, I guess there that means that split...

    Thanks. So, I guess there that means that split between the low and high stages is at 60% of total capacity or so. (I'd seen references to it being has high as 80% with two-stage scrolls so I wasn't...
  26. Opinions on Carrier zoning options (Infinity vs. Comfort)

    I've gotten some competitive quotes where the contractor is offering a choice of Carrier zoning systems.

    They both have variable speed air handlers.

    One is for a single stage heat pump and...
  27. Replies
    5
    Views
    923

    I have a Santa Fe Advance dehumidifier which...

    I have a Santa Fe Advance dehumidifier which could actually maintain 50% R.H. in an unsealed 1900 sq ft crawlspace. I've since had it sealed and so the run times are much less, but those are great...
  28. That makes sense. I knew solar gain was an issue...

    That makes sense. I knew solar gain was an issue (also body heat and heat from lighting/appliances, but I don't know if they include the latter).

    I'm getting some real load calcs in and was just...
  29. Are heating and cooling loads "symmetrical"?

    Not sure if this is the right place to ask this, but for the same temperature differential between the indoor and outdoor temperatures, are the heating and cooling loads more or less the same?
    ...
  30. Replies
    11
    Views
    928

    The 3 ton cooling quote was based on a 92F design...

    The 3 ton cooling quote was based on a 92F design temp, while the 2 ton (1.5+) was based on 88F. The latter is much more realistic for the area. Most folks don't have any A/C at all.

    I didn't get...
  31. Replies
    11
    Views
    928

    Good grief. Talk about mixed information. Now...

    Good grief. Talk about mixed information.

    Now I have a load calc from someone who apparently does a true manual J, and they size the cooling load at 20,000 BTU's at 88F, just over 1.5 tons.
    ...
  32. Replies
    11
    Views
    928

    It's true what you are saying about 1500sf to...

    It's true what you are saying about 1500sf to some extent, but the volume of air in the top half of that space is a good bit less than downstairs, probably about 1/2 once you exclude the attic...
  33. Maybe the more interesting question is "why?". I...

    Maybe the more interesting question is "why?". I can see how systems that use two compressors to implement the staging might be configured this way, but with two-speed scroll compressors it seems...
  34. Are two-stage heat pumps available in 1/2 sizes?

    I've been getting bids (and conflicting information), and the latest guy says that two-stage units only come in whole sizes (2, 3, 4). Meanwhile, someone has already already quoted me what appears to...
  35. Replies
    11
    Views
    928

    That sizing is more in line with what I would...

    That sizing is more in line with what I would expect, (but of course I realize you're not supposed to guess). Looks like they're possibly oversizing the backup, too, proposing 15 kw.

    To make...
  36. Replies
    11
    Views
    928

    New construction - load calc not realistic?

    I'm in the process of building a new house (just over 1300 sq ft) in the mountains at a comparatively high elevation in the southeast (almost 4000 feet) where the temps almost never exceed 80F....
  37. If you have a two-stage thermostat (no point not...

    If you have a two-stage thermostat (no point not having one IMHO if you have a two stage furnace or A/C), it should tell you if it's running on low or high (sometimes 1 or 2).

    If you have a...
  38. Reasonable heat gains/losses with attic air-handler?

    I had an additional room finished recently, and the contractor added a supply and return from the existing system. The air handler is in the attic.

    To make a long story short, I'm experiencing...
  39. Replies
    12
    Views
    1,685

    There's a thought. Actually, I had heard of...

    There's a thought.

    Actually, I had heard of but hadn't seriously considered one of these before (not really sure why -- maybe I didn't like the idea of a third system or was worried about the...
  40. Replies
    12
    Views
    1,685

    I don't disagree, but there are two related...

    I don't disagree, but there are two related issues.

    (1) The existing equipment supplies the upstairs of the house and is less than 3 years old, so I'm unlikely to recoup replacement cost via...
  41. Replies
    12
    Views
    1,685

    Thanks -- the HVAC subcontractor mentioned that...

    Thanks -- the HVAC subcontractor mentioned that he likes Honeywell boards, so I'll pass that information on.

    The existing equipment is 2H/1C, and the blower is conventional versus variable speed,...
  42. Replies
    20
    Views
    3,794

    Oh, for crying out loud. That's ridiculously...

    Oh, for crying out loud. That's ridiculously oversized.

    You have to do a heat load calculation. But just for comparison sake, I'm in North Georgia, and my 80K input 80% furnace keeps almost 3000...
  43. Replies
    12
    Views
    1,685

    Zoning board for two-stage furnace?

    I'm having a currently unfinished "bonus room" remodeled into a home theatre.

    The contractor's HVAC sub suggested zoning to accommodate the new space using the existing systems., but would not...
  44. http://www.acurazine.com/forums/images/smilies/goo...

    http://www.acurazine.com/forums/images/smilies/google.gif

    I have found several combustion air worksheets (here's a uniform building code worksheet:
    ...
  45. It's a simple technical question. The furnace...

    It's a simple technical question.

    The furnace is already in it's location (an 1800 square foot crawlspace), the only question is whether the attic chase and other openings into the house provide...
  46. Maybe I should rephrase the question. If you...

    Maybe I should rephrase the question.

    If you install an 80K BTU 80% furnace in an interior closet, how much net free area does there need to be in the closet door to provide for combustion air...
  47. Replies
    20
    Views
    1,586

    You really need a two-stage stat. A White-Rogers...

    You really need a two-stage stat. A White-Rogers 1F81 is a good reasonably priced model.

    With a single stage stat, the two stage furnace will (1) run on low for a preset amount of time, and then...
  48. Replies
    20
    Views
    1,586

    Trane makes (or did two years ago) a two-stage...

    Trane makes (or did two years ago) a two-stage 40K BTU 80% furnace that would match your heat load perfectly on high, while only putting out about 20K BTU's on low, very nice for not so cold days.
    ...
  49. It's mainly for humidity (e.g. mold) control. I...

    It's mainly for humidity (e.g. mold) control. I can already keep the crawlspace below 60% RH with the dehumidifier that I have (90 pints/day), but it would run much less with the encapsulation.
    ...
  50. Replies
    15
    Views
    3,795

    The main benefit of a two-stage furnace is long...

    The main benefit of a two-stage furnace is long running times. From a comfort perspective, this reduces the "off" period for the furnace, during which the edges of the house get colder and you can...
Results 1 to 50 of 182
Page 1 of 4 1 2 3 4
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event