
TCM - Conical diffuser

Circular conical diffuser for ceiling installation
Ideal for warm spaces due to the cooling applications.
- Suitable for horisontal supply and exhaust
- Suitable for cooling applications with supply/room air temperature difference as low as -12 °C
- Integrated or suspended ceiling installation
- Circular duct connection with rubber gasket
- Detachable cone module, enabling the cleaning of the diffuser and ductwork
Product Models and Accessories
- Models integrated in a panel for installation in modular suspended ceilings with dimension options of 450x450, 600x600 or 675x675 mm
- Plenum options with measurement and adjustment functions
- Measurement and adjustment module
The diffuser comprises several cones, made of epoxy-painted steel with a white (RAL 9010) or grey (RAL7004) standard colour.
The diffuser is suitable for exposed installation or installation flush to the ceiling.
The diffuser is connected to the ductwork using a Halton TRI balancing plenum, which utilises polyester fibre with a washable surface as sound attenuation material.
Option
The diffuser is connected to the ductwork using a Halton PLC plenum, which utilises mineral wool as sound attenuation material.
The plenum comprises an airflow measurement and adjustment module.
The diffuser is suitable for installation in 450x450 mm, 600x600 mm and 675x675 mm false ceilings.
The conical central core is removable.
The supply air pattern is radial in an angle of 360 degrees.
- Dimensions
- Material
- Accessories
- Product models
- Function
- Installation
- Adjustment
- Servicing
- Specification
- Order code
Halton TCM
Circular conical ceiling diffuser
- Suitable for horisontal supply and exhaust
- Suitable for cooling applications with supply/room air temperature difference as low as -12 °C
- Integrated or suspended ceiling installation
- Circular duct connection with rubber gasket
- Detachable cone module, enabling the cleaning of the diffuser and ductwork
Product models and Accessories
- Models integrated in a panel for installation in modular suspended ceilings with dimension options of 450x450, 600x600 or 675x675 mm
- Plenum options with measurement and adjustment functions
- Measurement and adjustment module
Dimensions ▲
NS | W | H | H1 | ØD |
100 | 330 | 80 | 17 | 99 |
125 | 330 | 80 | 17 | 124 |
160 | 330 | 73 | 17 | 159 |
200 | 457 | 88 | 22 | 199 |
250 | 610 | 110 | 27 | 249 |
315 | 610 | 95 | 27 | 314 |
355 | 863 | 139 | 35 | 354 |
400 | 863 | 129 | 35 | 399 |
450 | 863 | 121 | 35 | 449 |
Material ▲
Part | Material | Finishing |
Diffuser | Steel | Epoxy-painted White (RAL 9010) or Grey RAL 7004) / 50% gloss |
Plenum | Galvanised steel |
Accessories ▲
Accessory | Code | Description |
Balancing plenum with airflow measurement and adjustment unit | TRI/N | For balancing, equalising the airflow |
Plenum | PLC | Plenum for duct connection (with or without insulation) |
Sound attenuation | IN | Polyester fibre as sound attenuation material in Halton TRI plenum. Mineral wool as sound attenuation material in Halton PLC plenum. |
Airflow measurement and adjustment unit | MSM | For supply installation |
Airflow adjustment unit | LD | Circular galvanised steel unit for airflow adjustment (inside the coupling sleeve) |
Airflow adjustment damper | DD | Circular galvanised steel blade damper for flow adjustment (inside the coupling sleeve) |
Product models ▲
Product model | Code | Description |
Diffuser integrated in front panel, 600x600 mm | TCM/B | Sizes 100, 125, 160, 200, 250 and 315 are available integrated in a steel panel for installation in a modular 600x600 mm suspended ceiling. The external dimensions of the front panel are 595x595 mm. |
Diffuser integrated in front panel, 450x450 mm | TCM/C | Sizes 100, 125 and 160 are available integrated in a steel panel for installation in a modular 450x450 mm suspended ceiling. The external dimensions of the front panel are 445x445 mm. |
Diffuser integrated in front panel, 670x670 mm | TCM/D | Sizes 100, 125, 160, 200, 250 and 315 are available integrated in a steel panel for installation in a modular 675x675 mm suspended ceiling. The external dimensions of the front panel are 670x670 mm. |
Function ▲
Supply air is divided into several jets through the cones.
The divergent sections of the diffuser create negative pressure below the diffuser so room air is induced into the supply air device. Room air and supply air mix.
This internal induction reduces temperature and the air velocity into the space.
The process is the same outside the diffuser between the supply and mixed room air, with external induction further reducing velocity and the temperature difference between supply and room air.
This effect reduces the flow disturbances.
The diffuser can also be used as an exhaust unit.
Installation ▲
Code description
1. TCM
2. PLC plenum
The Halton TCM diffuser can be installed flush with a suspended ceiling or fully exposed in the space.
The diffuser is connected either directly to the duct or using a Halton PLC plenum or Halton TRI balancing plenum.
When it is connected directly to ductwork, a safety distance of minimum 3D upstream of the diffuser should be maintained.
Installation with plenum Halton TRI or PLC
TCM | ØD | TRI | H1 | H2 |
100 | 100 | TRI-100-100 | 17 | 249...279 |
125 | 125 | TRI-125-125 | 17 | 279...309 |
160 | 160 | TRI-160-160 | 17 | 312...342 |
200 | 200 | TRI-200-200 | 22 | 377...407 |
250 | 250 | TRI-250-250 | 27 | 394...424 |
315 | 315 | TRI-315-315 | 27 | 494...524 |
When the Halton TRI spigot is installed in the plenum, the H2 dimension can be reduced by 60 mm.
TCM | ØD | PLC | H1 | H2 |
355 | 355 | PLC-355 | 27 | 604...634 |
400 | 400 | PLC-400 | 35 | 584...614 |
450 | 450 | PLC-450 | 35 | 786...816 |
Dimensions of ceiling opening
NS | ØW1 |
100 | 266 |
125 | 266 |
160 | 266 |
200 | 406 |
250 | 533 |
315 | 533 |
355 | 787 |
400 | 787 |
450 | 787 |
Adjustment ▲
The airflow rate can be adjusted and measured only when the diffuser is installed.
In order to enable airflow adjustment and measurement of airflow rate, it is recommended that the diffuser be connected to a plenum equipped with the MSM module.
The supply flow rate is determined using measurement and adjustment module MSM.
Detach the conical central core and pass the tubes and control spindle through the diffuser.
Measure the differential pressure with a manometer. The flow 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 in the plenum and push the conical central core back into place.
The k-factors for installations with different safety distances
(D= duct diameter)
PLC/TRI | >8xD | min 3xD |
125 | 9.9 | 12.6 |
160 | 16.9 | 21.9 |
200 | 28.3 | 31.0 |
250 | 47.9 | 51.5 |
315 | 78.6 |
Airflow adjustment damper DD
The airflow rate is adjusted by turning the damper blades behind the diffuser with a screwdriver. The measurement is carried out when the diffuser is installed.
Servicing ▲
Remove the conical central core by gently drawing it out by the central panel (simultaneously, a small pin on the inner side of the external cone is pushed and the assembly is turned clockwise, until it comes free).
Clean the parts by wiping them with a damp cloth.
Push the conical central core back into place so that the springs lock.
Option: with balancing plenum Halton TRI + MSM or PLC + MSM
Remove the measurement and adjustment module by gently pulling the shaft (not the control spindle).
Wipe the parts with a damp cloth, instead of immersing in water.
Reassemble the measurement and adjustment module by pushing the shaft until the module meets the stopper.
Push the conical central core back into place so that the pin locks.
Specification ▲
The diffuser comprises several cones, made of epoxy-painted steel with a white (RAL 9010) or grey (RAL7004) standard colour.
The diffuser is suitable for exposed installation or installation flush to the ceiling.
The diffuser is connected to the ductwork using a Halton TRI balancing plenum, which utilises polyester fibre with a washable surface as sound attenuation material.
Option
The diffuser is connected to the ductwork using a Halton PLC plenum, which utilises mineral wool as sound attenuation material.
The plenum comprises an airflow measurement and adjustment module.
The diffuser is suitable for installation in 450x450 mm, 600x600 mm and 675x675 mm false ceilings.
The conical central core is removable.
The supply air pattern is radial in an angle of 360 degrees.
Order code ▲
TCM-D; WS-CO-ZT
D = Connection size
100, 125, 160, 200, 250, 315, 355, 400, 450
Other Options and Accessories
WS = Width of suspended ceiling tile
N Standard
450 450x450
600 600x600
675 675x675
CO = Colour
W White
G Grey
ZT = Tailored product
N No
Y Yes
Sub products
PLC Plenum (Ceiling Diffusers)
TRI Plenum (Diffusers)
DD Airflow adjustment damper
LD Airflow adjustment damper
Code example
TCM-100, WS=N, CO=W, ZT=N
Downloads & Media
Halton TCM - gb | Type Datasheet | Language English (United Kingdom) | Size 797.4 kB |
Halton TCM - fr | Type Datasheet | Language French (France) | Size 626.3 kB |
Halton TCM - ru | Type Datasheet | Language Russian (Russia) | Size 827.7 kB |
Halton TCM - se | Type Datasheet | Language Swedish (Sweden) | Size 797.7 kB |
Halton TCM - dk | Type Datasheet | Language Danish (Denmark) | Size 797.7 kB |
Halton TCM - fi | Type Datasheet | Language Finnish (Finland) | Size 796.8 kB |
Halton TCM - nl | Type Datasheet | Language Dutch (Netherlands) | Size 793.2 kB |