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  1. You may need someone with a thermal imaging...

    You may need someone with a thermal imaging camera and a good psychrometer to inspect.

    Here's a possible scenario - the air conditioner of the unit below yours has a pipe separated in the ceiling...
  2. In the simplest terms, it cannot be done. ...

    In the simplest terms, it cannot be done.

    Heat pumps are made for a given number of heads and can have no more than that amount. No valving, wiring, or alteration will change it.

    As has been...
  3. I have a Prestige thermostat in our house and use...

    I have a Prestige thermostat in our house and use them for customers. At our house it controls a dual fuel system, dehumidification, and humidification, and it has a portable comfort control which...
  4. Your post belongs in the Ask Our Pros forum since...

    Your post belongs in the Ask Our Pros forum since you are Asking Our Pros. That is the correct place for posts by homeowners.
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    It should be vented according to the...

    It should be vented according to the manufacturer's installation instructions. Then a combustion analysis should be performed to verify proper combustion adjustment and venting.
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    Anything electrical which has gotten wet has to...

    Anything electrical which has gotten wet has to be replaced. Even if it works now, the sediment and moisture will kill it soon.
    You're probably going to be better off replacing the furnace.
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    It could be a number of things. But we can’t...

    It could be a number of things. But we can’t diagnose it from here.
    And site rules prohibit giving advice for DIY.
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    900 CFM range hood?! That's venting over two tons...

    900 CFM range hood?! That's venting over two tons of cooling/hr. It seems like overkill to me.
    An its "advice", not "advise."
  9. Thread: Air Leak?

    by kdean1
    Replies
    2
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    137

    Normal when the seals aren't installed. The coil...

    Normal when the seals aren't installed. The coil usually comes supplied with rubber grommets to seal around the pipes. I wonder what else they didn't bother to do.
    They can be sealed with putty to...
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    Most blowers are rated for .5" WC. Some cheap...

    Most blowers are rated for .5" WC. Some cheap models are only rated for .2 or .15. Evidently they're designed for very short ducts and a cheap air filter.
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    Many zone dampers are normally open. When one...

    Many zone dampers are normally open. When one zone calls, all other zones close. There’s nothing wrong with running the fan as long as you realize that doing so will evaporate moisture on the coil...
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    We don’t give technical advice in the AOP forum.

    We don’t give technical advice in the AOP forum.
  13. Replies
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    Static pressure is very often on the high end of...

    Static pressure is very often on the high end of the blower chart in the manual. This is because the duct system is almost always too small and the equipment is too big. There's no way to know...
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    How did you arrive at your air flow figures? Many...

    How did you arrive at your air flow figures? Many contractors don’t know or measure air flow, so I’m curious how a homeowner would know.
    To answer your question would require the following:
    1....
  15. It broke. Idea/suggestion - call for service....

    It broke.
    Idea/suggestion - call for service. Site rules prohibit giving DIY advice.
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    456

    Why are you using a contractor you don’t trust?...

    Why are you using a contractor you don’t trust? Get a contractor you DO trust.
  17. Replies
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    633

    I don't want every customer. If I have to explain...

    I don't want every customer. If I have to explain every step of the process in every repair I'd get less work done.
    Those who critique every charge get quoted a higher price for my trouble.
  18. Thread: PTAC argument

    by kdean1
    Replies
    18
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    440

    It is only traditional in an up-flow...

    It is only traditional in an up-flow configuration. It is completely wrong to do so for a down-flow.
  19. Replies
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    Publicly declaring that you’re a hack is not the...

    Publicly declaring that you’re a hack is not the best way to introduce yourself on a site for professionals.
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    Was your old system the same size, or even...

    Was your old system the same size, or even smaller? Was a Manual J load calculation performed to determine what size is actually needed? Equipment which is too big will not dehumidify because it does...
  21. Thread: Pet Peeves

    by kdean1
    Replies
    157
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    2,894

    Adding one I haven't seen mentioned yet - many...

    Adding one I haven't seen mentioned yet - many people state the subject and then add a pronoun. Examples - The judge, he rendered a verdict. Or, congress they considered a bill. Or my wife she went...
  22. A larger dehumidifier will not be a bad thing....

    A larger dehumidifier will not be a bad thing. The Ultra-Aire units are built in the U.S.
    Honeywell now manufacturers theirs overseas.
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    HVAC installation requires expensive, specialized...

    HVAC installation requires expensive, specialized tools, especially for ductless units. The seller would have you believe it is simple, but the many times I have been called to fix a DIY installation...
  24. I have experienced problems with Nest even with a...

    I have experienced problems with Nest even with a common wire. Don’t bother with a Nest professional. Just install a Honeywell and the problem will disappear.
  25. Thread: Loud Blower Fan

    by kdean1
    Replies
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    252

    Did you “upgrade” the furnace to a larger one?...

    Did you “upgrade” the furnace to a larger one? I’ll wager it is too big.
  26. Replace the nest thermostat and see if the...

    Replace the nest thermostat and see if the problem goes away.
  27. Nest thermostats have been known to cause weird...

    Nest thermostats have been known to cause weird behavior. If you’re using a Nest I recommend anything else.
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    That's very true. There are some members here...

    That's very true. There are some members here whose experience astounds me. Their posts reveal their knowledge in short order. I try read their posts thoroughly.
  29. We installed some Heat Controller condensers this...

    We installed some Heat Controller condensers this year for some apartments. The 1 & 1.5 ton units use 1/4 liquid line but I see 2 ton unit specifies 3/8" line. Models CMA18-SD

    My ICP distributor...
  30. Thread: Noisy supply

    by kdean1
    Replies
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    620

    But his answer is correct.

    But his answer is correct.
  31. Thread: Pet Peeves

    by kdean1
    Replies
    157
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    2,894

    So here's mine. :whistle: I've noticed many...

    So here's mine. :whistle: I've noticed many posts here begin with "so."

    Irregardless - (not a word)
    Absolutely when "yes" is all that's needed.
    Driving without using turn signals.
    Boots on...
  32. Thread: Noisy supply

    by kdean1
    Replies
    17
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    620

    See post #6.

    See post #6.
  33. I didn’t know furnaces had a heat pump mode.

    I didn’t know furnaces had a heat pump mode.
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    Amperage must be measured with the door on as...

    Amperage must be measured with the door on as that is the way the unit will be used.
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    You really need tools to measure air flow....

    You really need tools to measure air flow. Looking at motors and ducts cannot assess air flow.
    The Testo 510 is an inexpensive manometer. Once you start measuring static pressure and can read a...
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    I don't remember if I read it (maybe on HVA-talk)...

    I don't remember if I read it (maybe on HVA-talk) or heard it on HVAC School podcast, but the current information is that fractionation is a non-issue for R410-A.
    In 2010 there were all kinds of...
  37. Replies
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    It's great that you're learning but PLEASE don't...

    It's great that you're learning but PLEASE don't resurrect a thread from 2013!
  38. Replies
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    That information is about 10 years old and out of...

    That information is about 10 years old and out of date. R410-A is a near azeotropic blend rather than a true azeotropic blend. Information in the last few years is that R410-A does not fractionate as...
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    After 16 years I recommend a new unit.

    After 16 years I recommend a new unit.
  40. I insist No Nest for our equipment. Too many...

    I insist No Nest for our equipment. Too many problems.
  41. Replies
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    Get rid of the Nest. They are unreliable. I’ve...

    Get rid of the Nest. They are unreliable. I’ve experienced intermittent behavior on systems with Nest. Replacing the Nest eliminated the problem.
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    High efficiency equipment does not remedy...

    High efficiency equipment does not remedy undersized ducts. The equipment manufacturer specifies static pressure for the equipment. It is up to the installing contractor to ensure proper ducting.
  43. Replies
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    Don’t accept a bid based on the size of the old...

    Don’t accept a bid based on the size of the old unit. Insist on a load calculation.
  44. Whatever Carrier says will work. Any thermostat...

    Whatever Carrier says will work. Any thermostat will provide basic cooling operation.
  45. Replies
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    What does Fujitsu tech support say?

    What does Fujitsu tech support say?
  46. We recommend getting a local contractor to fix it.

    We recommend getting a local contractor to fix it.
  47. Good idea. My doctor likes it when I bring my own...

    Good idea. My doctor likes it when I bring my own stethoscope and scalpel.
  48. Replies
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    Measure the draft and ensure proper combustion...

    Measure the draft and ensure proper combustion air.
  49. In answer to your statement, No. Site rules...

    In answer to your statement, No. Site rules prohibit giving advice for DIY.
  50. Replies
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    Have it looked at by a tech? Site rules...

    Have it looked at by a tech?

    Site rules prohibit giving DIY advice.
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