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Hydro-air system in CT needs new coil

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forthill
forthill Member Posts: 2
Greetings,
I am purchasing a home in Norwalk CT which has a Peerless hydro-air and the inspector noted that one of the air-handler coils needs replacing. How involved is it to replace and are there any reputable and reasonably priced HVAC outfits to recommend as I also need the whole HVAC system serviced.
Thanks for your help.
Walt

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  • HVACNUT
    HVACNUT Member Posts: 5,865
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    Peerless hydro-air?
    Do you mean a Peerless boiler feeding a hydro coil for an A/H?
    The bad coil is the heating coil, not the evaporator?
    Is the coil internal or external at the A/H?
    What's access like?
    Is there antifreeze to deal with?
  • forthill
    forthill Member Posts: 2
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    HVACNUT said:

    Peerless hydro-air?

    Do you mean a Peerless boiler feeding a hydro coil for an A/H?

    The bad coil is the heating coil, not the evaporator?

    Is the coil internal or external at the A/H?

    What's access like?

    Is there antifreeze to deal with?

    Yes, Peerless (PB Heat) cast iron boiler feeding a hydro coil for an A/H. The inspector noted that there is corrosion noted at air handler coil - plus there's a tag hanging from the coil that actually states 'coil needs to be replace 1-5-15' LOL
    The picture included in the report looks like it is an 5/8 inch tube, 2 row, 10 fins per inch, 6 inches tall by 17 inches inches wide headered hot water booster coil with slip & drive casing.
    And yes, he did mention that it looks like anti-freeze is present.

    Thanks,
    Walt
  • HVACNUT
    HVACNUT Member Posts: 5,865
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    Well the antifreeze needs to be tested.
    If theres decent access and workspace, it shouldn't be a big job.
  • pecmsg
    pecmsg Member Posts: 4,895
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    Forget Home Inspectors. (Couldn't tell if there was ant-freeze in the system)

    Get a Hydronic contractor to inspect the boiler, piping, air handlers and the suspect coil!
    SuperTech
  • BennyV
    BennyV Member Posts: 49
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    It's possible you need a replacement, but some corrosion on the outside of a pipe probably isn't a big deal. There is no "replacement schedule" for a hydro air coil. If it leaks, replace it. If you upgrade HVAC equipment with new AHUs, you get coils to match the new AHU. Otherwise, you don't replace them.
  • BennyV
    BennyV Member Posts: 49
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    One other thing. If it's using Cryotek or another type of Propylene Glycol antifreeze, that needs to be flushed and replaced every 10 years. It's common in hydro air systems with attic AHUs.