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  1. #1
    Join Date
    Jan 2004


    I found something interesting at the local mega-discount store...cardboard coils with scented gel attached that you clip to your system's air filter. When the air is blowing on the filter, the scent filters through the system and your house. I bought the cinnamon scented one and it's actually very nice!

    My question is, does anyone know if these things are harmful to the HVAC system at all? It's small enough that it won't block air flow, so I'm more concerned about the chemical aspects of it. I wouldn't think it was very harmful, but ya never know.


  2. #2
    Join Date
    Sep 2002
    I don't know
    It's not harmful for your HVAC system; more importantly, it's harmful to you. (same goes for any chemical scent)

    There's too much crap in indoor air as it is; if you need some chemical "air freshener", indoor air quality is an issue which needs to be addressed.

    Furnaces are designed to heat the air, not clean it or add chemicals.

    [Edited by amd on 10-25-2005 at 12:52 AM]

  3. #3
    Senior Tech Guest
    Don't see how they are harmful...biggest problem is they only last days.

  4. #4
    Join Date
    Jan 2004


    I just got it cause it smelled IAQ issue. Maybe I should stick with pot pourri!

  5. #5
    Join Date
    Aug 2004
    North Richland Hills, Texas
    how big is it? Most of the scented things I have seen that are for clipping to an air filter are a flat 6"x6" square thing that can actually have a rather big effect on the airflow, depending on the system.
    If more government is the answer, then it's a really stupid question.

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