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  1. #1
    Join Date
    Nov 2012
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    8

    Media filter pressure question

    I had spoken to a contractor who sounded like he was actually giving me good advice and knowledge, and after reading some more after the conversation, I've decided to go with a media filter instead of eac. in regards to this, just a quick question regarding some of the concerns ive read about,

    i have a somewhat entry level furnace, single stage 75k btu, blower rated at around 1100~cfm. the aprilaire merv 11 media is rated at 0.08 wc drop. will i have an issue with pressure?

  2. #2
    Join Date
    Jun 2007
    Location
    Greenwood Indiana (Indianapolis)
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    420
    What size is the filter?
    As iron sharpens iron so one man sharpens another Proverbs 27:17 NIV84

  3. #3
    Join Date
    Dec 2010
    Location
    The Quad-Cities area (midwest).
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    2,692
    It'll depend on the RA ductwork and grilles. Note: Normally the supply side is okay.

  4. #4
    Join Date
    Nov 2012
    Posts
    8
    oh sorry, thought i had typed that out . the aprilaire 2210 / 210 filter

  5. #5
    Join Date
    Nov 2012
    Posts
    8
    Quote Originally Posted by George2 View Post
    It'll depend on the RA ductwork and grilles. Note: Normally the supply side is okay.
    duct is 16x25 (filter size) picture

  6. #6
    Join Date
    Dec 2010
    Location
    The Quad-Cities area (midwest).
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    The drop (pictured) is fine. I'm asking about the ductwork size above it. Which way does the ductwork go? Is it a pretty even split? How many returns are off each end? How many RA grilles are there in the home?

    The ductwork/grilles will be the problem, if any, not the AprilAire 2200. You said 2210? Is that a smaller one?

  7. #7
    Join Date
    Aug 2007
    Location
    Northern VA 38 degrees N by 76 degrees W
    Posts
    5,060
    Quote Originally Posted by a176 View Post
    I had spoken to a contractor who sounded like he was actually giving me good advice and knowledge, and after reading some more after the conversation, I've decided to go with a media filter instead of eac. in regards to this, just a quick question regarding some of the concerns ive read about,

    i have a somewhat entry level furnace, single stage 75k btu, blower rated at around 1100~cfm. the aprilaire merv 11 media is rated at 0.08 wc drop. will i have an issue with pressure?
    Where are you getting the 0.08 pressure drop from?

  8. #8
    Join Date
    Nov 2012
    Posts
    8
    Quote Originally Posted by second opinion View Post
    Where are you getting the 0.08 pressure drop from?
    spec sheet

  9. #9
    Join Date
    Nov 2012
    Posts
    8
    Quote Originally Posted by George2 View Post
    The drop (pictured) is fine. I'm asking about the ductwork size above it. Which way does the ductwork go? Is it a pretty even split? How many returns are off each end? How many RA grilles are there in the home?

    The ductwork/grilles will be the problem, if any, not the AprilAire 2200. You said 2210? Is that a smaller one?
    its a pretty even split yes. i have two returns, one coming from 1st floor, other coming from second floor. 2210 is the current model, its 25" depth.

  10. #10
    Join Date
    Jun 2005
    Location
    SW Wisconsin
    Posts
    4,985
    Quote Originally Posted by a176 View Post
    I had spoken to a contractor who sounded like he was actually giving me good advice and knowledge, and after reading some more after the conversation, I've decided to go with a media filter instead of eac. in regards to this, just a quick question regarding some of the concerns ive read about,

    i have a somewhat entry level furnace, single stage 75k btu, blower rated at around 1100~cfm. The aprilaire merv 11 media is rated at 0.08 IWC drop. will I have an issue with pressure?
    It's rated at; Air Flow @300 Fpm with Initial Resistance @0.08 in WC, Final Resistance @0.5 In WC.

    The filter's free-air-area will put the initial velocity around twice that 300-fpm number.

    A 16X25 filter is 400-sq,ins / 144 is 2.77-sf; * using .65% free-air-area = 1.8-sf.
    1100-CFM / 1.8-sf is 611-fpm velocity through a new clean filter.

    A pleated filter is usually rated at 500-fpm initial velocity; therefore, the pressure drop will be considerable greater than what is stated at 300-fpm.

  11. #11
    Join Date
    Dec 2010
    Location
    The Quad-Cities area (midwest).
    Posts
    2,692
    Udarrell....I don't think the picture he sent was the AprilAire 2210. I'm assuming that the new filter will be much thicker.

    The 2 returns don't sound like enough. what size are the grilles and where are they located? Floor or wall?

    I have never heard of the 2210...I'll go online and have a look.

  12. #12
    Join Date
    Dec 2010
    Location
    The Quad-Cities area (midwest).
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    2,692
    I went to the AprilAire website and the model 2210 (media) looks very much like a Bryant/Carrier "E-Z flex" media.

    The site said the maintenance requirerment is 1 to 2 years..............Right!

  13. #13
    Join Date
    Aug 2007
    Location
    Northern VA 38 degrees N by 76 degrees W
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    5,060
    Quote Originally Posted by George2 View Post
    I went to the AprilAire website and the model 2210 (media) looks very much like a Bryant/Carrier "E-Z flex" media.

    The site said the maintenance requirerment is 1 to 2 years..............Right!
    On a very clean house with no activity.

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