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  1. Replies
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    not cfcs....

    Volcanoes erupt and spew a bit of chlorine, not cfcs.
    As for picking on us - this affects more than just the HVAC community - it still affects the auto industry, fire protection industry, MANY...
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    You vote for R12?

    LOL - price any R12 lately?
    There are those who would disagree with your assessment that the ozone hole is "replenishing" itself. And also that R22 (Freon) is not a major contributor to the...
  3. Thread: What a mess!

    by panhead98
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    R22

    I don't know if I'd call R22 obsolete - it will be phased out of production, but will be available for years to come. There are MILLIONS of a/c units that use R22 in service currently. If its...
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    many recommend...

    many recommend running B-vent directly from furnace - maintains exhaust gas temps, and takes care of your clearance issues. We've had to do that in many communities for that very reason.
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    Nice call, Hearthman...

    Its a common mistake - is it a chimney? Or is it a manufactured vent? Like you say, its a vent, and the regulations are different.

    Just to be the devil's advocate, for those thinking "taller is...
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    Oldman1 -

    very nice answer. That's why I visit this board - for answers like that. Well thought out, no b.s. Professional.
  7. yes

    yes - its buildingscience.com - Joel has alot of terrific ideas.

    Also check out www.speediboot.com - a great product to seal boot penetrations.
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    check w/ manufacturers

    its an issue of the flux, not the strength of Stay Brite. No flux on 410a systems - supposedly sludges up the system's oil.
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    Wrong- the need for refrigerants without...

    Wrong- the need for refrigerants without chlorine. Its getting old. New refrigerants are here to stay - time to accept them.
    Whether you agree with the government (and the rest of the world) or...
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    don't understand

    I don't understand - are we talking about proper install techniques, or the elimination of CFCs and HCFCs required by the Clean Air Act?

    Replacement refrigerants demand that you use the proper...
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    sorry

    sorry - after many years of putting in residential systems, don't recall many, if any, cases of equipment leakge from the factory. Maybe it was the brand.

    Maybe it was the fact I wrap my access...
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    proper top notch install?

    With a proper top notch install, there shouldn't be ANY leaks. Why would even a 5 percent leakage rate be acceptable? To me, proper top notch install means pulling a vacuum, using a quality micron...
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    Thank you - written very clearly. As for those...

    Thank you - written very clearly. As for those that seem to think this is all hogwash - good luck to you!

    Dash - looking for your opinion on static pressure in ductwork in RESIDENTIAL low...
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    some interesting points

    Bigtime brings up some very interesting points - and I can agree with them.

    Can't wait to hear how this winds up - and how "willing" the builder is going to be to make these changes. I'll bet...
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    just to be clear-

    Just to be clear - you're saying that in a trunkline, at any given place, in a residential application, the static pressure of the air is NOT equal - its got the most pressure on the top surface of...
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    yelram

    yelram - have you done much residential work? Just curious - I see that you are a pro member.
    As you can see, no one has been able to quote any printed authority on this subject, but its been...
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    and there is no doubt about the poor quality

    I don't think anyone doubts the quality level of this job. Its very poor. But this has been obvious since the first pics that were posted BEFORE drywall. There was an opportunity for options - either...
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    easy enough to find out who sub works for...

    I'm sure Mr. Kcrossley can fill us in - did he sign contract for hvac work, or was that part of the builder's contract? Try telling a builder that's hired and paying you, that the "future" homeowner...
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    wow -

    wow - didn't realize that static pressure "prefers" takeoffs in some locations better than others. Interesting - even for us "residential" guys -

    That abomination of triangles and flex - depends...
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    Pro membership-

    I've applied twice - emailed copies of CFC certs, etc - that was weeks ago. Never heard back. Figured just because someone's name says "pro" member doesn't make them anymore knowledgable than some...
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    Pita?

    PITA? Could the contractor feel similarly? He is correct - he works for the builder. The builder pays him. HE is actually the customer, correct? I'm guessing the builder accepts this type of work...
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    how far from end cap?

    How far from an end cap, on rect. duct, should your last takeoff be? We've always recommended 2 takeoff diameters from the end - for example a 6" takeoff should be no closer than 12" from the end of...
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    looks like its for combustion air-

    looks like the wall cap is for combustion air.

    As for 80% furnaces with draft inducer motors, and typical natural draft hot water heaters, this is extremely common around here - in fact probably...
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    length limitations

    flexible duct connectors have a length limitation of 14 ft. - Flexible duct has no length limitation. They carry different ratings on construction - take alook at the stamped/screen printed labels...
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    Where is brm located?

    is this brm, by chance, located over the garage? Or could it possibly have a roof hip, etc that is common to one of its walls? Might not neccessarily be a HVAC issue, but a construction/insulation...
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