THL - Conical diffuser

Circular conical diffuser for ceiling installation

Ideal for high spaces and easy to clean and maintain.

  • Horisontal or vertical air supply
  • Suitable for both heating and cooling applications
  • Adjustable throw pattern (radial or compact jet)
  • Installation flush to the ceiling, or exposed (especially in high spaces)
  • Circular duct connection with gasket
  • Openable front disk enables cleaning of the diffuser and ductwork

Accessories

  • Plenum options with measurement and adjustment functions

The ceiling diffuser has a steel casing with an adjustable front disk and a spigot with integral gasket for connection to the circular duct.

The diffuser is polyester or painted white (RAL 9010) colour.
The throw pattern of the diffuser is adjustable in radial or compact jet.

Halton THL

Round conical ceiling diffuser

  • Horisontal or vertical air supply
  • Suitable for both heating and cooling applications
  • Adjustable throw pattern (radial or compact jet)
  • Installation flush to the ceiling, or exposed (especially in high spaces)
  • Circular duct connection with gasket
  • Openable front disk enables cleaning of the diffuser and ductwork

Accessories

  • Plenum options with measurement and adjustment functions
     

Dimensions

Halton THL, manual

NS ØW H H1 H2 ØD
100 286 97 25 9 99
125 286 97 25 9 124
160 286 97 25 9 159
200 354 81 30 10 199
250 440 84 39 12 249
315 546 102 52 14 314
400 685 135 70 14 399


Halton THL with wax-bulb actuator

NS ØW H H1 H2 H3 ØD
250 440 84 39 12 173 249
315 546 102 52 14 193 314
400 685 135 70 14 215 399

Material and finishing

 Part  Material  Note
 Frame  Steel  
 Front disk  Steel  
 Finishing  Painted,
 White (RAL 9010)
 Special colours available

Accessories

 Accessory Code  Description
 Balancing plenum TRI  For balancing, equalising the air flow
 and attenuating the duct noise

Product Models

Halton THL, manually operated

Changing manually the front disk position the throw pattern can be adjusted from radial to compact.
 

Halton THL with wax-bulb actuator

Sizes 250, 315 and 400 can be equipped with a wax-bulb actuator, which work without any power supply. The front disk position changes according to the temperature of supply air. The temperature range of the wax-bulb actuator is about 20 °C to 27 °C.

The time taken to change from radial to compact jet (or the other way around) is 10 - 20 minutes.
When warm air is supplied the piston of the wax bulb actuator keeps moving until the THL supply air pattern is vertical. When cold air is supplied, the Halton THL supply air pattern is changed back to horizontal by means of a spring.

Function


                  Compact jet                                              Radial jet

The Halton THL is a ceiling diffuser with an adjustable low pattern.
The horisontal radial jet is used mainly in cooling applications and the vertical compact jet with warm supply air in heating applications.

The supply air pattern can be adjusted by rotating the front disk into the desired position.
The recommended maximum temperature difference in cooling applications between supply and room air temperature is 10 °C.

Installation

Code Description
1.  Front disk
2.  Frame

The diffuser is connected either directly to the duct by screwing or riveting or alternatively to the Halton TRI balancing plenum.

The minimum recommended safety distance upstream of the diffuser is 3xD.

Installation with Halton TRI

The collar of Halton TRI plenum can be installed either internally in the plenum or externally onto the bottom of the plenum.
The height of the unit for the external installation is presented in the table below.
When the collar is installed internally, the total height H3 is reduced by 60 mm.

THL (ØD)  ØD1  TRI  ØW1  H2  H3 
100  100 TRI-100-100 244 9 242-282
125  100 TRI-100-125 244 9 242-282
125  160 TRI-125-125 244 9 272-312
160  125 TRI-125-160 244 9 272-312
160  160 TRI-160-160 244 9 312-352
200  160 TRI-160-200 306 10 312-352
200  200 TRI-200-200 306 10 371-411
250  200 TRI-200-250 384 11 380-420
250  250 TRI-250-250 384 11 444-484
315  250 TRI-250-315 482 13 455-495
315  315 TRI-315-315 482 13 500-550
400  315 TRI-315-400 617 14 518-558

Adjustment

The Halton THL itself has no means for airflow adjustment.

In order to enable airflow adjustment and measurement of airflow rate it is recommended that the diffuser be connected to the TRI balancing plenum. The supply airflow rate is determined by using the measurement and adjustment module MSM.

Detach the front disk or the whole diffuser and pass the tubes and control spindle through the side slot of the diffuser.
Replace the front disk or diffuser.
Measure the differential pressure using a manometer. The airflow rate is calculated using the formula below.

Adjust the airflow rate by rotating the control spindle until the desired setting is achieved.
Lock the damper position with a screw.
Replace the tubes and spindle into the plenum.

The k-factor for installations with different safety distances (D= duct diameter)

TRI  > 8 x D  min 3 x D 
100  6.0 7.5
125  9.9 12.6
160  16.9 21.9
200  28.3 31.0
250  47.9 51.5
315  78.6 -

 

The technical performance has been defined for radial and compact jet with the fixed cone module openings. The adjustment positions used are detailed in the table below.

  THL (R)  THL (C) 
Size Radial jet Compact jet
100  8 -4
125  10 -4
160  12 0
200  15 0
250  19 0
315  24 0
400  30 0

Servicing

Measure the distance between the front disk and the upper frame in order to enable recovery of the same technical properties after cleaning.

Detach the front disk of the diffuser and clean the parts by wiping with a damp cloth.
Reinstall the front panel.

Specifications

The ceiling diffuser has a steel casing with an adjustable front disk and a spigot with integral gasket for connection to the circular duct.

The diffuser is polyester or painted white (RAL 9010) colour.
The throw pattern of the diffuser is adjustable in radial or compact jet.

Order Code

THL-D

 D = Connection size
 
    100, 125, 160, 200, 250, 315, 400
 

Other Options and Accessories

CO = Colour
         W      White
          X      Special colour

MO = Actuator type
         NA    Not assigned
         M1    Wax-bulb actuator (if D = 250, 315 or 400)
 

Sub products

        TRI  Plenum (Diffusers)

Code example

        THL-100, CO=W,MO=NA

Downloads & Media

Halton THL - ru
Type
Datasheet
Language
Russian (Russia)
Size
745.6 kB
Halton THL - se
Type
Datasheet
Language
Swedish (Sweden)
Size
718.0 kB
Halton THL - fi
Type
Datasheet
Language
Finnish (Finland)
Size
717.3 kB
Halton THL - nl
Type
Datasheet
Language
Dutch (Netherlands)
Size
718.6 kB
Halton THL - dk
Type
Datasheet
Language
Danish (Denmark)
Size
719.4 kB
Halton THL - uk
Type
Datasheet
Language
English (United Kingdom)
Size
756.1 kB
Halton THL - fr
Type
Datasheet
Language
French (France)
Size
718.7 kB