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  1. #14
    Join Date
    Aug 2002
    Location
    Office and warehouse in both Crystal River & New Port Richey ,FL
    Posts
    18,836
    Round pipe takes less metal ,for the same airflow,doesn't make for any better airflow the sq.,or flex,if it's sized correctly.

  2. #15
    Join Date
    Jul 2004
    Location
    midwest
    Posts
    2,868
    Quote Originally Posted by dash View Post
    Round pipe takes less metal ,for the same airflow,doesn't make for any better airflow the sq.,or flex,if it's sized correctly.

    The statement round is best for air flow should have been round is the most efficient way to move air. 150 CFM out of round pipe, flex, or square is still the same amount in the end

  3. #16
    Join Date
    Jan 2008
    Posts
    196
    Quote Originally Posted by mlo1 View Post
    If I can believe the original installer the system was to be a 3.5 ton. But a 3 ton was actually chose because of availability.
    I just looked at my the contract/invoice. Mr. installer had told me he figured the system requirements to be 3.5 ton. He wrote the Carrier air handler # FV4BNA00500 w/15KW strip heat on the contract. Seems that is a 4 ton unit, so he rounded up as there is no 3.5 ton offered. He made a big deal about this handler as it was an "A" coil, which he said would help with dehumidification.

    But he installed a Carrier FV4BNF003000 AAAA air handler with out telling me. Upon inspection, this has a "slant" coil.

    If I am interpreting the numbers correctly. It appears the 003 has to low of CFM for my supply needs. And possibly with the slant, may be less capeable of dealing humidity which was high on my list of priorities (bad asthma).

    Any insight between the two?

  4. #17
    Join Date
    Aug 2002
    Location
    Office and warehouse in both Crystal River & New Port Richey ,FL
    Posts
    18,836
    Those are indoor units,air handlers,what outdoor unit was installed?

  5. #18
    Join Date
    Jan 2008
    Posts
    196
    The intention was to use a 223ANA048. Though when I found out it was the lower line of products, I asked it be upgraded.

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