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  1. Replies
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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?
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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?
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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?
  13. Thread: sharing holes

    by charles2
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    sharing holes

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

    by charles2
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    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...
  15. Thread: line set size

    by charles2
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    477

    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?
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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?
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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?
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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.
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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?
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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.
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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?
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    lineset vibration

    What causes a heat pump lineset to vibrate in the winter but not in the summer?
  29. 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.
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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...
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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.
  33. 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?
  34. 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.
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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.
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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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    No old-timers on this forum? The unit is about 30...

    No old-timers on this forum? The unit is about 30 years old.
  41. Replies
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    SEER of York MCE18-6A?

    Can anybody tell me what the SEER of a York MCE18-6A is?
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    best practices when installing linesets

    What steps do you take when running linesets through wood framed houses to ensure that no vibrations from the linesets are heard in the houses?
  43. Replies
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    You (moderator) are not exactly answering my...

    You (moderator) are not exactly answering my question. Are you aware of any disposable pleated MERV 8 filter that is less restrictive over its lifetime?
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    Camfil Farr filter pressure drop claim

    Camfil Farr claims that their 30/30 filter has the lowest average pressure drop of any MERV 8 filter. But they don't seem to have any data to prove that claim. The only data they have is attached...
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    Did they check it by pressures only, or by super...

    Did they check it by pressures only, or by super heat and sub cool.

    Beats me!
  46. Replies
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    The charge has always checked out fine. ...

    The charge has always checked out fine.



    It's true that I don't completely trust what I can't verify for myself, but that doesn't stop me from making a decision. I chose to have the compressor...
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    Camfil-Farr tells me they know somebody who makes...

    Camfil-Farr tells me they know somebody who makes a 2" filter grille, but I haven't seen it and it may be a commercial style, not residential.
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    Thanks for the link. Average pressure drop...

    Thanks for the link. Average pressure drop reported by most mfrs on MERV 8 is about 0.2. What's really shocking is that some filter mfrs recommended that their filter be changed when the pressure...
  49. Replies
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    The vibration in the lineset occurs only during...

    The vibration in the lineset occurs only during heat. The hum from the air handler occurs year round and was cured when we pulled the filter. Lineset vibration improved substantially too. Main...
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    Yes, too small and leaky too. It's a 14" x 18"...

    Yes, too small and leaky too. It's a 14" x 18" oval on a 2.5 ton system.
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