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  1. #1
    Join Date
    Jun 2011
    Location
    Seattle WA
    Posts
    1,241

    Least Restrictive 4" Media

    What is the lowest pressure drop 4" media filter out there? I am using a Columbia MERV 8 right now and the damn thing is responsible for a .2 drop, What! This system is inverter driven and I need to get the static pressure at least .1 lower or the EEV wont allow full capacity. Thanks
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  2. #2
    Join Date
    Jun 2001
    Location
    Moore, Oklahoma, United States
    Posts
    4,301
    What is the feet per minute across the filter?
    The Glassfloss is .25" @ 500FPM.
    http://www.glasfloss.com/Pleated%202012.pdf

  3. #3
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,193
    .1 over a 4" media probably won't happen unless you are using a 20x25 at 100 CFM

    On our system 20x25 Aprilaire was .23" clean at 1600 CFM. New 1" was .5 for compariston.

  4. #4
    Join Date
    Sep 2009
    Location
    Hampton, GA
    Posts
    571
    Quote Originally Posted by 54regcab View Post
    What is the feet per minute across the filter?
    The Glassfloss is .25" @ 500FPM.
    http://www.glasfloss.com/Pleated%202012.pdf
    Good filter. I have that in my system at home.

  5. #5
    Join Date
    Jun 2001
    Location
    Moore, Oklahoma, United States
    Posts
    4,301
    Quote Originally Posted by mofotech View Post
    Good filter. I have that in my system at home.
    I use them also, one of the best value 4" filters IMHO.

  6. #6
    Join Date
    Aug 2011
    Location
    Eastern Shore, MD
    Posts
    798
    Quote Originally Posted by LibertyTree View Post
    What is the lowest pressure drop 4" media filter out there? I am using a Columbia MERV 8 right now and the damn thing is responsible for a .2 drop, What! This system is inverter driven and I need to get the static pressure at least .1 lower or the EEV wont allow full capacity. Thanks
    i had the same issue....what i did was put 2 20x25 4" in...now i have a .07" drop!

  7. #7
    Join Date
    Aug 2011
    Location
    Eastern Shore, MD
    Posts
    798
    Name:  filter rack.jpg
Views: 75
Size:  43.0 KB

    this is it most of the way done

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