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Boost bulkhead beam
Boost bulkhead beam

Halton CHB – Chilled beam

Boost function gives the possibility for fast control of room temperature.

  • Combined cooling, heating, and supply-air unit for bulkhead installation
  • Different sizes, to meet various cooling and air-flow demands


  • Combined cooling, heating, and supply-air unit for bulkhead installation
  • Different sizes, to meet various cooling and air-flow demands
  • Fulfilling high requirements for thermal comfort and silent conditions spaces
  • Boost allows the fast response to the cooling and heating capacity of the unit by 50-80% depending on the performance point
  • Enhanced life-cycle performance:
  • Energy-efficient solution with low air and water flow in both cooling and heating modes
  • Suitability for systems using free energy sources and heat pumps
  • Low-cost maintenance due to a simple and hygienic principle of operation.
  • Operates as a non-condensing dry system with minimal use of mechanical parts: no mechanical filters, condensation tray, or drainage piping
  • Suitable for both renovation projects and new construction

 Product models and Accessories

  • Model with combined cooling and heating coil
  • Models with three different width
  • Model for eventual boost-fan retrofitting
  • Integrated control valves and actuators – delivered loose

Dimensions and weight

L = 1000/1200/1400

L1 = 826/1026/1226

Inspection and maintenance back of the unit

(BO = Y or BO = R)


30 kg (excluding water and fan)


 Part  Material  Finishing  Note
 Return-air grille Pre-painted
galvanised steel
(RAL 9003 or RAL 9010,
20% gloss)
Special colours available.
Supply-air grille
 Aluminium Polyester-epoxy-painted
(RAL 9003 or RAL 9010,
20% gloss)
Special colours available.
Casing  Galvanised steel
 Supply-air plenum  Galvanised steel
 Brackets  Galvanised steel
 Coil pipes  Copper
 Coil fins Aluminium
 Fan frame
 Fan impeller

Cooling/heating-water pipe connections are Cu15/Cu12 with wall thickness of 0.9–1.0 mm, meeting European standard EN 1057:1996. The maximum operating pressure for chilled/hot-water pipework is 1.0 MPa. The supply-air duct connection diameter is 125 mm.


 Accessory Code  Description  Note
and heating coil
 TC =
H = coil with additional
hot-water circulation.
Copper water pipe
connections are Ø 15 mm
(cooling) and
Ø 10 mm (heating).
 Booster fan BO =
Boost fan can be installed
in factory or delivered later
as retrofitted.
The retrofitting of boost fan is
possible only if BO=R selected,
when the beam is ordered.
 Control valve CV =
Valves with adjustable
Kvs value
(Danfoss RA-C, DN 15)
or with  max. flow limit
(Danfoss AB-QM, DN 10
in heating
Danfoss AB‑QM DN 15
in cooling).
 Delivered loose.
 Valve actuator VM =
Thermal on/off actuators
(230 VAC, NC or 24 VAC, NC)
for both  valve types.
Also 230V 0-10V actuator
Delivered loose.
Cable length: 1.2 m
If controls chosen,
24V  actuator not available.


The Halton CHB unit is an active chilled beam for bulkhead installation.

The primary supply air enters the plenum of the active chilled beam, from which it is diffused into the room through nozzles and a supply grille on the front of the chilled beam. The supply-air nozzle jets efficiently induce ambient room air through the return-air grille and the heat exchanger, where it is either cooled or heated. The combined air jet is directed along the ceiling surface.

Three nozzle sizes are available, to enable various supply-air flow rates.

The unit is available in three widths, to meet a wide range of appearance and capacity demands.

The units provide water-side cooling and heating capacity control

The chilled beam can be equipped in the factory with either a standard control valve or a combination control valve.

Controls may include either a standard control valve or a combination control valve. Both are operated with a thermal actuator, and the water-flow rate of the control valve is based on room air temperature. The standard control valve has an adjustable Kvs value. The combination control valve has an adjustable nominal water-flow rate, and there is a pressure difference measurement across the control valve in order to ensure that a great enough pressure differential (min.16 kPa) is available to match the adjusted water-flow rate and the automatic balancing in use.


The Halton CHB unit is suitable for bulkhead and suspended-ceiling installation. The chilled beam’s ceiling brackets can be fixed directly to the ceiling surface or suspended by means of threaded drop rods (8 mm). The recommended maximum distance of the supply air grille from the ceiling is 200 mm. The return-air grille has a 40-mm telescopic connection and the supply air grille a 200-mm telescopic connection.

Install the main pipelines of the cooling- and heating-water loops above the level of the chilled beams, to allow venting of the pipework.

Picture above: If controls or boost selected inspection door needed for maintenance/ installation



The recommended cooling-water mass flow rate is 0.02–0.10 kg/s, resulting in a temperature increase of 1–4 °C in the heat exchanger. For avoiding condensation, the recommended inlet-water temperature of the heat exchanger is 14–16 °C.


The recommended heating-water mass flow rate is 0.01–0.04 kg/s, resulting in a temperature decrease of 5–15 °C in the heat exchanger. The recommended temperature of the inlet water for the heat exchanger is 35–45 °C.

Balancing and control of water-flow rates

Balance the water-flow rates of the chilled beam with the standard control valve by selecting the desired Kvs value in the valve body. When using an automatically balancing combination valve, set the desired water-flow rate in the valve body, and verify the pressure difference (min.: 16 kPa) across the valve. Regulating the water mass flow rate controls the cooling and heating capacity of the chilled beam.

Adjustment of the supply-air flow rate

Each chilled beam is equipped with a measurement tap for static pressure measurement, which enables fast and accurate measurement of the rate of supply-air flow through the beam. The air-flow rate is calculated by means of the formula below.

Where k value is determined according table below:

Nozzle Width k [l/s] k [m3/h]
A 1000 2,14 7,71
A 1200 2,83 10,20
A 1400 3,59 12,91
B 1000 2,93 10,55
B 1200 3,90 14,06
B 1400 4,97 17,91
C 1000 4,00 14,40
C 1200 5,39 19,41
C 1400 6,94 24,99


Code Description
1.  Return air grille
2.  Supply air grille
3.  Supply air connection
4.  Chilled water pipe connections
5.  Heating water pipe connections

Open the return-air grille of the chilled beam. Clean the finned coils of the heat exchanger with a vacuum cleaner, taking care not to damage the finned coils. Clean the return- and supply-air grilles with a damp cloth.

Check at regular intervals that the actuators and water-flow control valves are working.


The Halton CHB unit is an active chilled beam for bulkhead and enclosed installation with return and supply air grilles. The Halton CHB has an option of a boost fan integrated into the unit.

The return- and supply-air grilles shall be openable and removable for maintenance. The return-air grille has a 40-mm telescopic connection and the supply-air grille a 200-mm telescopic connection

The inlet duct connection shall be changeable and able to be located at the right, left, or middle of the supply-air plenum. When there is an integrated fan, there is no option for a connection in the middle.

The heat exchanger of the beam shall be oriented such that the water connections may be on either the right or left side of the beam.

All pipes shall be manufactured from copper, connection pipes with a wall thickness of 0.9–1.0 mm. The fins of the heat exchanger shall be manufactured from aluminium. The heat exchanger shall be factory pressure-tested. The maximum operating pressure of pipework shall be 1.0 MPa.

Each active chilled beam shall be protected by a removable plastic coating and individually packed in a plastic bag. Duct connection and pipe ends shall be sealed during transit.

Each chilled beam shall be identifiable by a serial number printed on a label attached to the active chilled beam.

Order Code


S  = Nozzle type  
A           Nozzle 5
B           Nozzle 6
C           Nozzle 7

W = Total width of the unit
1000       1000 mm
1200       1200 mm
1400       1400 mm

E  = Location of supply-air connection    
R            Right
L             Left
M            Middle (not possible with BO=Y or BO=R)

K  = Location of pipe connections
R            Right
L             Left

Other options and accessories

CO = Colour of grilles
SW    Signal white (RAL9003)
W      Pure white (RAL 9010)
X        Special colour (RALxxxx)

TC = Cooling/heating functions (coil type)
C          Cooling
H          Cooling and heating

BO = Booster fan
N          No
Y          Yes
R          Retrofit possibility

CV = Control valves
N          Not assigned
A2        Adjustable Kvs (Danfoss RA-C, DN 15), loose
A4        Max. flow limit (Danfoss AB-QM),
DN 10  (heating) and DN 15 (cooling), deliverd loose

VM = Valve actuator
N           Not assigned
A1         24V On-Off
A2         230V On-Off
A3         24V 0-10V Modulating

ZT = Tailored product
N          No
Y          Yes (ETO)

Code example

CHB /A-1000-L-R, CO=SW, TC=H, BO=Y, CV=A2, VM=A2, ZT=N


Fig.1.  3D-image with room controller (CHB).

Fig.2.  Hotel Best Western Premier Katajanokka, Helsinki, Finland
In picture CHH, witch has similar outlook as CHB


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Halton CHB - fr
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