DHN - HEPA diffuser

HEPA nozzle diffuser

High turbulent nozzle diffuser with HEPA filter for hospital and clean room environments to be installed flush to the ceiling or to the wall.

  • Radial or swirl air supply through adjustable nozzle
  • Available for supply and exhaust
  • Suitable for integrated ceiling and wall installation
  • A measurement access through the diffuser plenum for pressure measurement and aerosol test
  • Easy filter change and cleaning through the openable diffuser panel
  • Reduced installation space requirement due to low unit height
  • Easy installation with fixing brackets
  • Sizes 595 and 670 adapted for installation in modular suspended ceilings
  • Filters E10, H13 and H14 available as standard
  • Powder coated finishing, standard colour RAL9010

Accessories

  • E10 and H13 with foamed polyurethane gasket 
  • H14 with foamed polyurthane or gel gasket
  • Pre-filter G4 for exhaust applications
  • Filters do not include to the diffuser delivery, to be ordered separately

Halton terminal diffuser DHN with HEPA filter for hospital and clean room environments to be installed flush to the ceiling or to the wall. Air is supplied through individually adjustable nozzles.

Nominal size 595 and 670 adapted for installation in modular suspended ceiling. Diffuser frame (size 595) adapted to suite different ceiling types. The diffuser is installed either fast into ceiling/wall or hanged from the ceiling using movable fixing parts.

Diffuser casing is made of galvanized steel and powder painted. The inside of the diffuser is smooth to enable easy cleaning and free from grooves to prevent collection of impurities. Plenum is equipped with an internal measurement tap for filter pressure drop and aerosol test.

Easy filter change and cleaning of the diffuser and ductwork through open able diffuser panel. Integral guides shall enable exact positioning of the filter to ensure complete thigness.

HEPA filter with aluminium frame and cold moulded polyurethane or gel gasket according to EN 1822 is supplied with individual test certificate (H14).

Halton DHN

HEPA Nozzle diffuser

  • Radial or swirl air supply through adjustable nozzle
  • Available for supply and exhaust
  • Suitable for integrated ceiling and wall installation
  • A measurement access through the diffuser plenum for pressure measurement and aerosol test
  • Easy filter change and cleaning through the openable diffuser panel
  • Reduced installation space requirement due to low unit height
  • Easy installation with fixing brackets
  • Sizes 595 and 670 adapted for installation in modular suspended ceilings
  • Filters E10, H13 and H14 available as standard
  • Powder coated finishing, standard colour RAL9010

Accessories

  • E10 and H13 with foamed polyurethane gasket 
  • H14 with foamed polyurthane or gel gasket
  • Pre-filter G4 for exhaust applications
  • Filters do not include to the diffuser delivery, to be ordered separately

Dimensions

 Halton DHN, top connection - circular (D=1)

DHN ØD W H K K1 K2 P
365-1 159 365 210 336 320 392 27
595-1 199 595 210 554 473 545 33
670-1 314 670 210 642 625 697 39

 

 Halton DHN, top connection - circular (D=1)

DHN ØD W P K M
975-1 314 670 975 955 646
1280-1 399 670 1280 1260 646

 

 Halton DHN, side connection - circular (D=2)

DHN ØD W H H1 K K1 K2
365-2 159 365 360 252 336 320 392
595-2 199 595 400 272 554 473 545
670-2 249 670 450 297 642 625 697

 

 Halton DHN, side connection - rectangular (D=3)

DHN L W K K1 K2
365-3 199 365 336 320 392
595-3 399 595 554 473 545
670-3 499 670 641 625 697

Material

 Part  Material  Note

Casing

 Galvanised steel  
 Front panel  Steel  
 Nozzles  Polyacetal (POM)

Colour alternatives:
White, Grey, Black

 Coupling sleeve  Galvanised steel  
 Filter brackets  Acid proof
 or galvanised steel
 
 Guide pins  Polyethylene
 terephthalate (PET)
 
 Fixing brackets  Galvanised steel  
 Finishing  Polyester painting,
 white (RAL 9010)
 Special colours available

Function

Air is filtered and supplied radially into the space or exhausted through the front panel of the unit.
Supply air pattern can freely be directed in up to four directions or alternatively radially as swirl jet.

Filters

Laminar flow filters, class E10, H13 and H14

Specification

  • Strong frame and construction with steel protection grid
  • Filters available in classes E10, H13 and H14
  • Aluminium frame, foamed polyurethane or gel gasket
  • Protection screens composed of stretched steel grid with white painting


Material

 Part  Material
 Filter media  Folded class fibre paper
 Frame  Aluminium
 Gasket  Polyurethane or gel


Operating range

  • Continuous operating temperature  80 0C
  • Relative humidity max. 100 %
  • Recommended maximum final pressure drop 250 Pa
  • The nominal flow rate is the recommended maximum, othewise the efficiency might reduce


Dimensions

E10, H13 and H14 with polyurethane gasket

Filter W H D
CLP-LF-AF-305-305-68 ...  305  305  68
CLP-LF-AF-457-457-68 ... 457 457  68
CLP-LF-AF-610-610-68 ... 610 610  68
CLP-LF-AF-610-914-68 ... 610 914  68
CLP-LF-AF-610-1219-68 ... 610 1219  68


H14 with gel gasket

Filter W H D
CLP-LF-AF-305-305-78 ...  305  305  78
CLP-LF-AF-457-457-78 ... 457 457  78
CLP-LF-AF-610-610-78 ... 610 610  78
CLP-LF-AF-610-914-78 ... 610 914  78
CLP-LF-AF-610-1219-78 ... 610 1219  78


Filter selection 


Technical values

Airflow rate is based on face velocity of 0,45 m/s. This nominal flow rate should not exceed.
 

Coarse panel filter, class G4


Specification

  • Progressive thermally smoothened synthetic polyester having high dust holding capacity and high constancy for humidity
  • The filter media is framed by a rigid plastic frame, which makes filters completely incinerable.
  • Glueable seal provided with filter delivery


Material

 Part  Material
 Filter media  Polyester fibre
 Frame  Plastic
 Sealant  Foamed plastic


Operating range

  • Maximum operating temperature  80 0C
  • Relative humidity max. 100 %
  • Final pressure drop recommended for filter replacement 200 Pa 
  • Initial efficiency (2 µm, 1700 m3/h) 50 % 


 Dimensions

Filter W H D
CL-KSM-300x300x25-G4-S 300 300 25
CL-KSM-455x455x25-G4-S 455 455 25
CL-KSM-610x610x25-G4-S 610 610 25
CL-KSM-455x610x25-G4-S 455 610 25
CL-KSM-605x610x25-G4-S 605 610 25

Filter dimensions are without gasket.


Filter selection

Installation

 

1.   Front panel
2.   Filter
3.   Plenum
4.   Fixing brackets

The diffuser is connected directly to the duct by screwing or by riveting. The connection is sealed as leakproof with an appropriate method.
The diffuser is installed either fast into or hanged from the ceiling with M6 (recommended minimum) drop rods using fixing brackets. Alternatively the diffuser is installed fast to the wall construction.

It will not be allowed to drill or make any holes to the diffuser plenum.

Open the front panel be gently pulling from the openings in the front panel. Front panel will hang from the hinges. Detach the panel from the hinges.
Clean the diffuser plenum before the filter installation.
Install the filter into diffuser. The guide pins ensure the exact location of the filter. Turn or slide the brackets below the filter and tighten them evenly.

Scan the filter for bypass leakages and correct the tightness, if necessary.
Reattach the front panel by pushing it until the springs lock.

Adjustment

The airflow adjustment and shut off will be made with PTS/A damper in the ductwork (tightness class 4 EN 1751). The pressure drop of the clean filter can be used as a reference for airflow rate with a reasonable accuracy. If there is no measurement unit available, Halton MSA or MSD may be used as measurement unit.
 

Constant or variable airflow and shutt off

The airflow is adjusted with the aid of electrical airflow management damper Halton HFB/G in the ductwork. Depending on the application the damper is ordered either with constant or variable air volume settings. See details of ordering from Halton HFB documentation.

Servicing

Close the airflow with the shut off damper.

Detach the front panel by gently pulling from the openings in the front panel. The front panel can also be removed to further ease the filter change.
Remove the filter from the diffuser box by unlocking the brackets and turning or sliding the fasteners to the side.

Clean carefully the diffuser and housing with a suitable method. 

Install the new filter & lock it with the fasteners and tighten the screws.
Scan the filter for bypass leakages and correct the tightness, if necessary.

Reattach the front panel by pushing it until the springs lock.

Specification

Halton terminal diffuser DHN with HEPA filter for hospital and clean room environments to be installed flush to the ceiling or to the wall. Air is supplied through individually adjustable nozzles.

Nominal size 595 and 670 adapted for installation in modular suspended ceiling. Diffuser frame (size 595) adapted to suite different ceiling types. The diffuser is installed either fast into ceiling/wall or hanged from the ceiling using movable fixing parts.

Diffuser casing is made of galvanized steel and powder painted. The inside of the diffuser is smooth to enable easy cleaning and free from grooves to prevent collection of impurities. Plenum is equipped with an internal measurement tap for filter pressure drop and aerosol test.

 Easy filter change and cleaning of the diffuser and ductwork through open able diffuser panel. Integral guides shall enable exact positioning of the filter to ensure complete thigness.

 HEPA filter with aluminium frame and cold moulded polyurethane or gel gasket according to EN 1822 is supplied with individual test certificate (H14).

Order code

DHN-A-D; CO-IO-MA-ZT

A = Diffuser size
     
365, 595, 670, 975, 1280

D = Duct connection
     
1      Top connection, circular (available in all sizes)
      2      Side connection, circular (sizes 365, 595 and 670)
      3      Side connection, rectangular (sizes 365, 595 and 670)
 

Other Options and Accessories

CO = Colour
        
W      White (RAL 9010)
          X      Special colour

IO = Ceiling type installation option
       
NA      Standard T-profile (for all sizes)
        DC      Clip-In (Dampa) ceiling (only for size 595)

MA = Material
        
CS     Galvanised steel

ZT  = Tailored product
         N       No
         Y       Yes
 

Related products

Laminar flow filter
            
CLP-LF-AL-457-457-68-0-E11-GF-P

Coarse panel filter
           
CL-KSM-455-455-25-G4-S
 

Code Example

          DHN-595-1, CO=W, IO=NA, MA=CS, ZT=N

 

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