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  1. Okay cool so it must be due to the freezing. Yes,...

    Okay cool so it must be due to the freezing. Yes, the vast majority of houses here are slab on grade and reinforced concrete block walls. Until recent years (when builders found ways to cut costs)...
  2. Thanks for the info that's very interesting about...

    Thanks for the info that's very interesting about the limestone. A basement would be a good place to hide the ahu. In this house, the other side of that wall is the garage, so that unit is in the...
  3. I wanted to reply to this one part. I've seen...

    I wanted to reply to this one part. I've seen older houses (circa 1970s and 80s) here in Miami that use 1-1/4" pvc pipe in the same fashion (roughed in before the concrete slab is poured. I guess at...
  4. Oh no doubt. We definitely have it good haha

    Oh no doubt. We definitely have it good haha
  5. Yea it's not the ideal situation but that's how...

    Yea it's not the ideal situation but that's how they did it. I never thought to install a pump, but this works too. Some houses in the neighborhood (cookie cutter houses) don't have a unit for each...
  6. No no. I am going to edit the post for clarity....

    No no. I am going to edit the post for clarity. Two split systems. Upstairs uses 3/4 all the way. Downstairs system uses 3/4" from the AHU and then increases to 2" the rest of the way since the pipe...
  7. I hear ya. The 90 elbow wasn't ideal but would've...

    I hear ya. The 90 elbow wasn't ideal but would've required a lot more digging and cutting the pipe right by the footing to the house. The pipe has always been full of water since day one and also...
  8. Thank you for the feedback about the pavers haha....

    Thank you for the feedback about the pavers haha. This is my dads house (and the one I grew up in) and it sure cost him a pretty penny! I'm going to edit my post but yes, we have two split systems....
  9. Oh that's the extension that I lengthened out to...

    Oh that's the extension that I lengthened out to the front yard. This comes from the unit downstairs but unlike the AHU upstairs, this one goes under the slab of the house and is always full of...
  10. No crawlspace. This house is a slab on grade in...

    No crawlspace. This house is a slab on grade in Miami FL. What you probably see is the relief valve piping for the old water heater. It's been replaced a few years ago with a tankless heater.


    If...
  11. Here's how I put a stop to the everlasting mud pie [pics]

    While I understand it's common practice and universally accepted by builders everywhere to place the condensate line just outside the exterior wall of a house, I have feared foundation damage as well...
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    Thanks again for this. Definitely helps.

    Thanks again for this. Definitely helps.
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    If it was hot enough outside, wouldn't that...

    If it was hot enough outside, wouldn't that affect the refrigerant condensing and some vapor would make its way back to the evaporator?
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    Hey Cajunice, I'm pretty new here as well. Nice...

    Hey Cajunice, I'm pretty new here as well. Nice to meet you!
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    I can't say anything about Rudd but I know of...

    I can't say anything about Rudd but I know of someone who has two Rheem units mfg in 1/2002. They definitely hold up!
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    Thank you guys again and again for the very...

    Thank you guys again and again for the very informative replies on the best HAVC site on the web. I definitely learned a couple things and reinforced what I thought I already knew.
  17. I ended up having to do the suction line in my...

    I ended up having to do the suction line in my house. It was for the upstairs unit and the lineset is below the 2nd story concrete floor and covered by a drywall ceiling on the first floor. Wasn't...
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    Question about Fixed Orifice

    I understand the concept of a TXV and how it is superior when it comes to controlling refrigerant flow based on demand and I understand how a fixed orifice is limited by the size of the piston, but I...
  19. Thank you so much for this info, as it makes a...

    Thank you so much for this info, as it makes a ton of sense. I can't believe I forgot the piston. Great answer.
  20. Of course not but if you think of the liquid line...

    Of course not but if you think of the liquid line as the entrance and the suction as the exit point of the system, liquid is still being supplied at the same rate, correct? My only guess is a larger...
  21. Ok cool this puts me back to my original question...

    Ok cool this puts me back to my original question then. If they're typically 3/8 inch, how does a 5 ton unit remove more heat than a 2 ton unit if the refrigerant has the same size tube to travel...
  22. Well I took an hvac class in tech school a while...

    Well I took an hvac class in tech school a while back and all the example units my instructor had set up seemed to use the same diameter tubing when he taught us to braze and whatnot but I never...
  23. Must you increase lineset diameter when upsizing unit?

    I know upsizing a unit will result in high humidity etc but theoretically, I'm curious about something. If a 2.5 ton has the same diameter lines as a 5 ton (I don't know if they do but I'm guessing)...
  24. How is it that the pros connect the ahu?

    Hello I have yet another question about how the pros hook up an air handler to the plenum when the ahu is located in a small closet for example. In 2020, I watched them briefly install my...
  25. Okay I understand but why is the difference in...

    Okay I understand but why is the difference in equipment that allows for such a different temperature between freezer and a/c with the same refrigerant? Is it the metering valve? The charge etc?
  26. Difference between a freezer and automotive a/c

    Okay so it's something I've always wondered. How is it that r134a for example can be used to run an air conditioner which blows out the vents around 45 degrees in a vehicle, but it can also be used...
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