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  1. #1
    Join Date
    Dec 2012
    Posts
    62

    Filter Choice help: 4 or 5 inch, custom build ?

    I'm planning on having a new gas furnace installed. For years, I just had a 20x20x1. Now the proposals say they'll be building ? or including a 4" media filter slot. Questions:

    --Should I recommend a 5" instead of a 4". Does it matter in terms of dimensions, cost, availability, performance ?
    --These filters appear to either be part of the return duct (above the furnace, custom sheet metal work) or a cabinet made for filters. I'm a bit confused on this and what is better or what I should be aware of.

    Thanks

  2. #2
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,090
    4" is more common.
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    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

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