DEX3000 - Decentralised Ventilation
Mounting
The unit is attached to the ceiling using the mounting brackets provided. It is important to note whether the load-bearing capacity of the ceiling construction is sufficient to support the unit; find the unit’s weight under technical data. For detailed instructions, please refer to the assembly instructions.
If the outdoor air and exhaust air go directly backwards through the wall, we recommend using the two transport brackets for extra fixing – see drawing below.
| Wallbracket for |
A
[mm] |
B
[mm]
|
C
[mm] |
Weight
[kg] |
| DEX3060 |
420 |
98,6 |
80 |
1,0 |
| DEX3090 |
420 |
98,6 |
80 |
1,0 |
| DEX3120 |
522 |
98,6 |
80 |
1,1 |
Mounting options and placement
There will often be one optimal location for the unit in each room. Therefore, it is a great advantage that DEX3000 offers many different possibilities for duct connection. The unit can be connected with the ducts led backwards through the wall, led up through the ceiling or out the side towards the outer wall – see the illustration below.
HIGHEST LEVELS OF EFFICIENCY
In order to optimally circulate the fresh air in the room, the devices in the DEX3000 series use what is known as the “Coanda effect”:
By mounting directly under the ceiling, this creates a vacuum between the supply air flow and the ceiling surface. This keeps the supply air under the ceiling. This way, it is mixed with room air throughout the entire process, reducing air speed and achieving fast, effective circulation of fresh air throughout the room. For this principle to work effectively, there can be no major obstacles placed on the ceiling, such as lights.
More factors affecting good ventilation efficiency and room airflow:
- Positioning the unit directly beneath the ceiling to ensure the correct outlet angle and utilisation of the Coanda effect.
- Temperature relationship between the air in the room and supply air
- Energy of supply air jet (air roll)
The following illustrations show the different projection distances with corresponding air volumes. The aim is to permanently achieve an air speed (L02) of < 0.2 m/sec. in the area being occupied, in order to avoid draughts.
Positioning of DEX3000
When planning a DEX3000 solution, the shape of the room must be taken into consideration to achieve the optimal positioning of the unit. In rooms with a square ground plan with walls that are almost equal in length, the DEX3000 can be freely positioned, as close as possible to the middle of a wall. In narrow rooms, we recommend that DEX3000 is placed in the middle of the short wall to ensure good circulation of the ventilation air; placement on the long wall should be avoided.
