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  1. I found the label and it's a heat pump. But the...

    I found the label and it's a heat pump. But the temperature of the air coming out of the registers is more like a furnace than I'm used to with heat pumps. Was the XR13 special in that regard? Or...
  2. I don't see anything on the outdoor unit except...

    I don't see anything on the outdoor unit except xr13.
  3. How can I tell which this one is? The air coming...

    How can I tell which this one is? The air coming out of the registers seems much warmer than heat pumps I've felt before.
  4. Was the Trane XR13 ever offered as straight A/C?

    Or has it always been a heat pump?
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    Mfr and model #? Is the shaft the correct length?...

    Mfr and model #? Is the shaft the correct length? I think that was the problem the last time I looked for one.
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    Is an ECM exact replacement available, and if so,...

    Is an ECM exact replacement available, and if so, what % energy will be saved?
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    Thanks for your reply, but I don't understand it....

    Thanks for your reply, but I don't understand it. I don't think this 10 year old, tract house blower came with an ECM, and I don't know how many HP it is. I think the system is 2.5 tons.
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    fan power consumption

    On a Ruud UBHC-17J11NFD air handler, how many watts does the fan motor consume in continuous operation?
  9. It's not. I said this is a purely theoretical...

    It's not. I said this is a purely theoretical question. I was just fact checking a technical services director for a wood flooring company who claimed the opposite.
  10. That's what I thought. But what evidence is...

    That's what I thought. But what evidence is there? Has anyone actually demonstrated this to be true?
  11. Purely theoretical air conditioning question

    Suppose you don't care about humidity control - you only care about maintaining a particular temperature. If you oversize a system for the cooling load, will you save energy because the oversized...
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    Are y'all saying that without a trap, in a...

    Are y'all saying that without a trap, in a residential size system, a drain on the negative pressure side of an evaporator coil would not be able to drain any condensate? That the air rushing back...
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    condensate traps

    Besides blocking air leaks and insects, what are the reasons for a condensate trap? Why would you want a trap before a condensate pump?
  14. Replies
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    I think Hearthman would say if your installer is...

    I think Hearthman would say if your installer is certified by the National Fireplace Institute, then you are good to go.
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    How exactly would you conduct such research?

    How exactly would you conduct such research?
  16. Replies
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    I've not seen any sign that anyone is arguing...

    I've not seen any sign that anyone is arguing with anyone. Hearthman asks me questions to clarify my situation, and I ask him questions to clarify my understanding.



    You mean if you want it...
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    Hearthman, I hope you're still out there. I'm...

    Hearthman,

    I hope you're still out there. I'm wondering what you think of the practice of omitting the stove pipe entirely, and connecting the stove directly to the chimney pipe? They say it...
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    What is it about a colder climate that makes them...

    What is it about a colder climate that makes them feel that way?



    How can you tell that you have, or have had, a chimney fire?



    To my way of thinking, this will be the most dangerous part...
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    That's because I think ICC Excel is the only one...

    That's because I think ICC Excel is the only one sold in the US that meets the higher Canadian standard. Am I wrong? By your reasoning that the higher HT standard was necessary because formerly the...
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    Hearthman, Thanks for another helpful reply. ...

    Hearthman,

    Thanks for another helpful reply.

    Has there ever been a catastrophic chimney fire in a class A chimney that was *not* UL103HT? What about in a 103HT chimney that was not ICC Excel?
    ...
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    Hearthman, Thanks for your helpful reply. I'll...

    Hearthman,

    Thanks for your helpful reply. I'll try to address the issues you raised:

    1. This is a remodel of existing construction; no chimney currently exists.

    2. There is no question that...
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    new appliance for retrofit

    Does anybody on this forum have the knowledge and experience to recommend a new appliance for retrofit? By "appliance" I mean a wood stove, or a manufactured zero-clearance fireplace, or a masonry...
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    register filters?

    I understand flex duct cannot be cleaned like hard pipe. That being the case, is there such a thing as a register filter that prevents any mold spores in the flex duct from entering the living space?
  24. Thread: sharing holes

    by charles2
    Replies
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    694

    sharing holes

    Is there anything wrong with thermostat cable sharing a framing hole with Romex?
  25. Thread: line set size

    by charles2
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    685

    Let me explain why I'm asking: Some contractors...

    Let me explain why I'm asking: Some contractors are doing what's called "energy retrofits" where you take a poorly insulated, leaky house and you seal it tighter and add insulation. Which means that...
  26. Thread: line set size

    by charles2
    Replies
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    685

    line set size

    Which is worse/better, running a split system heat pump with a line set diameter that is too small, or too large?
  27. Replies
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    I always thought I was a good listener. What...

    I always thought I was a good listener. What exactly do you want me to hear?
  28. Replies
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    Current stat does NOT read outdoor temp, and the...

    Current stat does NOT read outdoor temp, and the system is not designed for lowest operating cost. I still think the Honeywell pair has too many bells and whistles. I'm just trying to find the lowest...
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    Alright. Are there any other competing brands I...

    Alright. Are there any other competing brands I should consider?
  30. Replies
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    Honeywell is certainly a good brand, but still...

    Honeywell is certainly a good brand, but still looks like too many bells and whistles. What do you see that looks like a good match?
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    Hmmm. Not exactly what I had in mind. There is no...

    Hmmm. Not exactly what I had in mind. There is no need to display outdoor temperature and humidity, and this is not a zoned system.
  32. Replies
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    wirelessly communicating thermostats

    Current thermostat for a Ruud 2.5 ton heat pump is a broken Braeburn and will be replaced on Friday. It's downstairs, and the single return is upstairs. Does there exist a pair of thermostats that...
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    More info: The air handler and coils are about 6...

    More info: The air handler and coils are about 6 years old, but the compressor is only 2 years old.
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    swapping ECM for PSC fan motors

    I know a HO who runs the fan on his Ruud UBHC-17J11NFD air handler (2.5 ton heat pump) continuously in the summer to help keep the temperature a bit more consistent between the upstairs and...
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    All right. Do you want the 3 elbows in both the...

    All right. Do you want the 3 elbows in both the liquid and suction lines?
  36. Replies
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    Kevin, good articles. There are already 3 elbows...

    Kevin, good articles. There are already 3 elbows in the large line, none in the small. Do you want them in both? And what would you say is the best way to secure linesets to wood framing?
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    Ruud 2.5 ton. Joists not visible - drywall is up....

    Ruud 2.5 ton. Joists not visible - drywall is up. Compressor on grade, air handler on 2nd story.
  38. Replies
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    Alright. I guess that makes sense. Is there any...

    Alright. I guess that makes sense. Is there any way to reduce the vibration so that it is not heard within the house?
  39. Replies
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    lineset vibration

    What causes a heat pump lineset to vibrate in the winter but not in the summer?
  40. Replies
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    OK. Back in the days when they were called...

    OK. Back in the days when they were called "America's Team" thanks to Ted Turner and TBS.
  41. Replies
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    Do you think maybe you haven't found a customer...

    Do you think maybe you haven't found a customer that likes them because if they had, they wouldn't have called you? The air handler has always been running continuously. I asked my favorite tech...
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    I apologize, I did not mean to offend anyone. I...

    I apologize, I did not mean to offend anyone. I was just hoping for more specific comments, such as "All such devices are totally worthless, and in fact the heat given off by the fan motors cancels...
  43. Replies
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    Tom, you are right on target. I wish someone with...

    Tom, you are right on target. I wish someone with knowledge or experience with register fans would chime in.
  44. Replies
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    You'd do it in an attic in GA in August?

    You'd do it in an attic in GA in August?
  45. Replies
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    I've got no problem with it stealing air from the...

    I've got no problem with it stealing air from the other rooms.
  46. Replies
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    Know any pros who want to go into my attic this...

    Know any pros who want to go into my attic this time of year? I'm in GA.
  47. Replies
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    register fans?

    I've seen register fans advertised somewhere. I think they replace standard rectangular registers, are plugged into a 120V receptacle and draw extra air into a room. How well do they work? Who makes...
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    Who are "they"?

    Who are "they"?
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    2 questions about flex duct

    1. What's the highest R-value foil-faced flex duct you've ever seen or heard about?

    2. Does it save you any time or money to insulate hard pipe by slipping it inside flex duct instead of wrapping...
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    Did mfr's even list SEER of split systems back...

    Did mfr's even list SEER of split systems back then?
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