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  1. Replies
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    204

    In Florida, or anywhere else, having the ductwork...

    In Florida, or anywhere else, having the ductwork and the air handler in the attic just kills the efficiency. When you purchased the new system, it would have been a great time to address a lot of...
  2. I agree with Jim J. I was too lazy to write all...

    I agree with Jim J. I was too lazy to write all of that. Just look at the sizes given; 6 tons of cooling, 7 tons of cooling and then two at 5 tons of cooling! You are right to be leery.
  3. Replies
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    204

    Believe it or not, most contractors don't know...

    Believe it or not, most contractors don't know any better or don't care. I'm not sure what your set-up is. When you say the ductwork was replaced, I would ask why? Where is the furnace located?
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    Two (2) CFM per square inch is what you should...

    Two (2) CFM per square inch is what you should have. So if your grille is 18"x24" ,that's 432 sq. in., times 2 equals 864 cfm. For 2.5 tons, you need a minimum of 1,000 cfm.

    More is better.
  5. I don't like washable filters, too restrictive. ...

    I don't like washable filters, too restrictive. The 20"x30" grille, if it's not a commercial grille, is too small for 4 tons of air.

    If the garage is at one end of the home, it's pretty hard to...
  6. A little more information is needed. I assume...

    A little more information is needed. I assume being in Florida that your home is on a slab. Is the AH (air handler) in the attic or in a closet within the home? One RA (return air) for a 4 ton...
  7. Thread: Attic Install

    by George2
    Replies
    8
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    458

    I agree with Shophound's opinion about keeping...

    I agree with Shophound's opinion about keeping the ductwork (if at all possible) out of the attic. It sounds like the more expensive guy is not cutting corners just to get a job.

    It's better in...
  8. A narrow coil should be mounted at least 6" above...

    A narrow coil should be mounted at least 6" above the furnace so that the furnace can have proper airflow over the HE (heat exchanger).
  9. Thread: Very unhappy!

    by George2
    Replies
    7
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    572

    There is not enough information to give you a...

    There is not enough information to give you a guess.

    Did you replace the entire system or just the AH?

    Did the size of the equipment change?

    Were there any ductwork modifications?
  10. Replies
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    941

    One thing is for sure, after seeing the...

    One thing is for sure, after seeing the home…………the furnace they installed is OVERSIZED! It looks like a 40,000 Btu would do the job.
  11. Replies
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    682

    When we installed units like yours, we put them...

    When we installed units like yours, we put them on a box to give us the 'turn' your talking about. Then we insulate the inside to help dampen the noise. Coming straight off a furnace is not going...
  12. Replies
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    941

    They do it around here all the time. The 2" will...

    They do it around here all the time. The 2" will be the PVC vent and they'll use the indoor air for combustion.

    The liner, as you stated, is for the W/H. Normally, the way you mentioned is...
  13. If the ductwork isn't correct, a bigger (unit)...

    If the ductwork isn't correct, a bigger (unit) will only amplify the problem. You need to have your 'ducks' in a row first. Proper ductwork, attic insulation and attic ventilation, etc. or you'll...
  14. We need to know the size of the riser (the...

    We need to know the size of the riser (the ductwork that goes to the second floor) off the furnace. Also, we need to know the size of the 2nd floor supply pipes. The contractor said they are 5", is...
  15. Replies
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    781

    Funny how the media room is larger and can be...

    Funny how the media room is larger and can be heated and cooled okay with one single 8" supply. A lot depends on the location of the AH to that room, the supply length and the exposure that room has...
  16. Replies
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    781

    The length of the existing supply (and the new...

    The length of the existing supply (and the new supply) will have an effect on the amount of airflow they will deliver. It also depend on the 'main' duct that feeds the all supplies.

    But assuming...
  17. Replies
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    A plenum (supply or return) is normally ducted. ...

    A plenum (supply or return) is normally ducted. This is not always the case. That's the reason for those last two sentences.
  18. Replies
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    781

    A low sidewall (LSW) return air verse a HSW...

    A low sidewall (LSW) return air verse a HSW return is the way to go. It can possibly be pulled through the stud pockets (from above) to a grille towards the floor. Or, if you have enough RA (return...
  19. Replies
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    It depends on the lay-out and the size of the...

    It depends on the lay-out and the size of the apartment. If it's a one room unit, like an efficiency apartment, then a mini-split will be fine. If it's a larger unit, then zoning
    works great.
    ...
  20. Replies
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    781

    As B.T. has mentioned, a return is needed. ...

    As B.T. has mentioned, a return is needed. That's one issue. Secondly, there is not enough supply feeding that room. Thirdly, and probably not a big of a deal if the other things mentioned are...
  21. The size of the grilles have importance but we...

    The size of the grilles have importance but we also need to know the size of the ducts (probably flex) that connects the grilles to the RA (return air) ductwork.
  22. Like B.L. said, the variable-speed blower will...

    Like B.L. said, the variable-speed blower will speed up to compensate for the poor ductwork (supply or return air) thus creating the excess air noise. A 4 ton system moves 1,600 cfm of air verse the...
  23. Replies
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    Goodman bought Amana. I think they are fine. ...

    Goodman bought Amana. I think they are fine. Sounds like they know what they are doing.
  24. I concur with B.L. You need (probably major)...

    I concur with B.L. You need (probably major) ductwork modification. Most systems start with undersized ductwork and modification of said ductwork is rare when installing larger equipment.

    I...
  25. Replies
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    I don't believe there is much difference in...

    I don't believe there is much difference in consumption between the two, but the more important issue is comfort (even cooling and noise). Zoning maybe a great option for your home now. Your...
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