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Halton THL – Conical diffuser

Circular conical diffuser for ceiling installation. Ideal for high spaces and easy to clean and maintain.

  • Suitable for both heating and cooling applications
  • Adjustable throw pattern (radial or compact jet)

Overview

  • 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

Quick selection

Fig.1. Halton THL with TRH plenum.

Dimensions

Halton THL, manual

THL_dimension

NS ØW H H1 H2 ØD
100 286 105 63 9 99
125 286 105 63 9 124
160 286 80 48 9 159
200 354 90 49 10 199
250 438 96 45 11 249
315 544 118 51 13 314
400 682 149 65 14 399

Halton THL with wax-bulb actuator

THL_WAX_dimension

NS ØW H H1 H2 ØD
250 438 96 45 11 249
315 544 118 51 13 314
400 682 149 65 14 399

Material

THL_material

Key Part Material Colour alternatives
1 Duct seal gasket Rubber
2 Frame Steel Powder paint, white (RAL 9003). Special colours available on reguest
3 Front disk Steel Powder paint, white (RAL 9003). Special colours available on reguest

Accessories

Accessory Code Description
Balancing plenum TRI For balancing, equalising the airflow
and attenuating the duct noise
(polyesterfibre)
Balancing plenum TRH For balancing, equalising the airflow
and attenuating the duct noise
(mineral wool and polyester fibre)

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

THL_TRI_dimension

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.

THL ØW TRI ØD ØD1 W1 L L1 H H1 min H2 max
100 286 100-100 99 102 282 308 154 152 100 135
125 286 100-125 99 127 282 308 154 152 100 135
125 286 125-125 124 127 432 458 229 182 100 135
160 286 100-160 99 162 282 308 154 152 90 105
160 286 125-160 124 162 432 458 229 182 90 105
160 286 160-160 159 162 432 458 229 222 90 105
200 354 125-200 124 202 432 458 229 182 98 114
200 354 160-200 159 202 432 458 229 222 98 114
200 354 200-200 199 202 592 618 309 272 98 114
250 438 160-250 159 252 432 458 229 272 107 119
250 438 200-250 199 252 592 618 309 272 107 119
250 438 250-250 249 252 592 618 309 336 107 119
315 544 200-315 199 317 592 618 309 336 121 139
315 544 250-315 249 317 592 618 309 336 121 139
315 544 315-315 314 317 592 618 309 336 121 139
400 682 200-400 199 402 592 618 309 382 137 169
400 682 250-400 249 402 592 618 309 382 137 169

Installation with Halton TRH

THL_TRH_dimension

THL ØW TRH ØD ØD1 W1 L L1 H H1 min. H2 max.
100 286 100-100 99 102 281 281 141 152 89 124
125 286 100-125 99 127 281 281 141 152 89 124
125 286 125-125 124 127 431 431 216 180 89 124
160 286 100-160 99 162 281 281 141 152 79 94
160 286 125-160 124 162 431 431 216 180 79 94
160 286 160-160 159 162 431 431 216 212 79 94
200 354 125-200 124 202 431 431 216 180 87 103
200 354 160-200 159 202 431 431 216 212 87 103
200 354 200-200 199 202 400 550 355 245 87 103
250 438 160-250 159 252 431 431 216 212 96 108
250 438 200-250 199 252 400 550 355 245 96 108
250 438 250-250 249 252 450 600 378 295 96 108
315 544 200-315 199 317 400 550 355 245 110 128
315 544 250-315 249 317 450 600 378 295 110 128
315 544 315-315 314 317 500 650 398 360 110 128
400 682 250-400 249 402 450 600 378 295 126 158
400 682 315-400 314 402 500 650 398 360 126 158

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 Halton TRH or 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.

Specification

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 9003) colour.
The throw pattern of the diffuser is adjustable in radial or compact jet.

Order code

THL/D; CO-MO-ZT

 D = Duct connection size
 100, 125, 160, 200, 250, 315, 400

Other options and accessories

CO = Colour
SW    Signal white (RAL 9003)
X       Special colour (RAL xxxx)

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

ZT = Tailored product
N       No
Y       Yes (ETO)

Sub products

TRI     Balancing plenum
TRH   Balancing plenum

Code example

THL-100, CO=SW, MO=NA, ZT=N

Downloads

Halton THL – Conical diffuser
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Halton THL – Kartiohajottaja
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Halton THL – Diffuseur plafonnier à cône réglable
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Halton THL – Konisk takspridare
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Halton THL – Deckenauslass
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Halton THL - fr
Datasheet
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