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  1. #1
    Join Date
    Sep 2012
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    37
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    Best performing registers?

    I need to replace a handful of old 12x6 ceiling registers. Is there a particular style, design, or manufacturer that will provide the best overall performance? Rather than trotting down to the local "big box store" and buying a few cheezy generic things, I'd like to get something that will make the most of the pricey system they're attached to.

    Suggestions?

    Thanks!

    D.

  2. #2
    Join Date
    Jun 2001
    Location
    Moore, Oklahoma, United States
    Posts
    4,636
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    Look into the Hart Cooley 821 and 831 series.
    It's what I have in my own house.

    http://www.hartandcooley.com/Librari...inum.sflb.ashx

  3. #3
    Join Date
    Jun 2005
    Location
    SW Wisconsin
    Posts
    5,680
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    Hart & Cooley Engineering Data:
    http://www.hartandcooley.com/Librari...Data.sflb.ashx

    (Ak) is the effective (sq.ft) free-air-area of the grille.

  4. #4
    Join Date
    Jan 2009
    Location
    Keokuk, IA
    Posts
    5,520
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    Quote Originally Posted by 54regcab View Post
    Look into the Hart Cooley 821 and 831 series.
    It's what I have in my own house.

    http://www.hartandcooley.com/Librari...inum.sflb.ashx

    +1. I installed one of these in a room with undersized branch and poor throw. Made a HUGE diffrence over a cheapo stamps steel grill. Including increasing hte boot size up to a 6"x14", it nearly doubled the flow at the same static pressure available on that branch and went from very noisy to silent.

    I've preached many times that many balancing problems can be solved just by changing registers and/or increasing their size without modifying the branch and sometiems without even adding balancing dampers on the other oversupplied branches.

  5. #5
    Join Date
    Aug 2003
    Location
    Fort Worth, TX
    Posts
    11,468
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    Adjustable curved blade registers for a ceiling supply are far better than stamped steel fixed blade equivalents in the same location. That said, the best register is the one that best fits where the supply outlet is, and how the air supplied to it should be introduced to the room. You can put a low restriction, curved blade model up where you have something less optimal now, but if it's not set correctly, or if it should be a three-way vs. two-way, for example, you still would not have the best register up there, in spite of spending more money.
    Building Physics Rule #1: Hot flows to cold.


    Building Physics Rule #2:
    Higher air pressure moves toward lower air pressure


    Building Physics Rule #3:
    Higher moisture concentration moves toward lower moisture concentration.

  6. #6
    Join Date
    Oct 2004
    Location
    So Cal & Maui
    Posts
    3,785
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    We use curved blade or 821's on ALL jobs.

    My question is why do you have a pricey system w/ old stamped steel registers?

  7. #7
    Join Date
    Sep 2012
    Posts
    37
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    Quote Originally Posted by precision hvac View Post
    We use curved blade or 821's on ALL jobs.

    My question is why do you have a pricey system w/ old stamped steel registers?
    The XV95 was just installed. Looking to optimize registers to get the most out of the pricey system.

    D.

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