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  1. #27
    Join Date
    May 2004
    Location
    south louisiana
    Posts
    3,188
    if you invest in changing the return air filter rack (the whole
    grill where you change the filter) you can buy a media filter
    grill. 4-5" filter fits into this grill.
    once system duct/return is sealed...the media filter filters
    a lot more particulte matter than 1" pleated media filter
    and is less restrictive. I recommend media filters to
    everyone who has sealed duct/return stystem.

    there is also a media filter that fits into the
    existing return. more expensive than the one
    that requires the change of r/a filter grill.

    so do the math.

    both filters are changed 2 times a year.
    so you re-coup some of the cost.

    electrostatic filters are crap.
    uv lights aren't necessary if stuff isn't entering duct return
    they are great at killing mold spores. but is system doesn't
    have leaks/condensation & food source..they aren't needed.
    also bulbs have to be changed every couple of years.

    best of luck.
    The cure of the part should not be attempted without the cure of the whole. ~Plato

  2. #28
    Join Date
    Dec 2012
    Posts
    18
    My current filter is just ahead of the furnace (see picture below). I'm thinking of having them put a media filter in this area when they redo and enlarge this area:

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  3. #29
    Join Date
    May 2004
    Location
    south louisiana
    Posts
    3,188
    it would depend on how much space you have there.
    media filter will need 5" for install. if the company
    can do the modifications and mastic seal rather
    than foil seal..it would be a worthwhile investment IMO.
    media filters are less restrictive than 1" pleated filters
    Restriction would be equal to rockstopper filter.
    as the media filter gets diry it actually performs better
    as it will pick up more particuate matter.

    as you continue to make improvements..air sealing
    the upstairs walls, doing return sealing & improving the filter, your unit
    will perform better.

    best of luck.
    The cure of the part should not be attempted without the cure of the whole. ~Plato

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