Fixed Discharge Diffusers Carnes

Fixed Discharge Round Diffuser Steel (SSEA) and Aluminum (SSFA)

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Symbol Carnes
Profile: Manufacturer
Headquarters: US
Certificates: AHRI
Business area: U. S.
Establishment date: 1939
Assortment: Vents, Fans, Louvers, Penthouses, Registers, Grilles, Diffusers, Humidifiers, Energy Recovery, VAV Terminals
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Product descritipion

Fixed Discharge Diffusers SSEA SSFA Carnes

High capacity unit with low sound levels, suitable for large spaces where no discharge adjustment is required.

Standard Features

  • Available in heavy gauge steel or aluminum construction.
  • Aluminum available through size 18 only.
  • Core is easily removed for installation or maintenance.
  • Neck sizes 4” through 36”.
  • Neck is sized to fit over duct for minimum air leakage.
  • Discharge is fixed horizontal setting.
  • Center button is removable for easy access to damper.
  • Standard  finish  is  Carnes  electrocoat  acrylic  baked  enamel.  Other  finishes are available upon request.
  • The standard color is #11 bright white. Other colors are available on request.

Optional Features

  • Safety  chain  (Option  S)  prevents  damage  or  injury  when  removing  core by connecting the core to the form.
  • Gasket (Option G) minimizes air leaks around edge of diffuser.
  • Sizes  14”  and  smaller  can  be  set  in  a  24”x24”  T-bar  panel  (Option  T)  for easier installation (p. A21).


  • When specifying damper for sizes 4-24, use opposed blade round damper model KXRA (p. A427).
  • When specifying damper for sizes 28-36, use radial deflector damper model KXNA (p. A430).

Fixed Discharge Diffusers Carnes - 1

T-bar Panel Option T

Use  with  Models  SSEA  and  SSDB  to  result  in  easier,  lower  cost,  quicker  and  higher  quality  installation  of  round  diffusers  in  suspended ceilings


  • Diffuser  sizes  14”  and  smaller  can  be  set  in  a  panel  to  fit  24”  x  24”  T-bar ceilings.
  • This panel will work with 9/16”, 15/16” or 1-1-/2” flat face T-bar.
  • Panels  to  fit  other  types  and  sizes  of  suspended  ceilings  are  available on request.
  • Panel construction is steel.

Installation Notes

  • Note  that  the  diffuser  inlet  is  still  oversized  to  fit  the  duct  inside.  This  eliminates  air  leakage,  but    requires  the  use  of  hard  duct  connection to the diffuser.
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