getAir easy ALD, Руководство пользователя

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3.1 Function
Free­running ventilation
When planning the installation of fresh air in-
lets, they must be positioned in accordance
with the cross-ventilation principle. Airflow
volumes must be calculated to take account
of humidity levels. Account also needs to
be taken of different wind pressures (for in-
stance a pressure difference of 2 Pa in low-
wind areas or 4 Pa in high-wind areas). Such
a ventilation concept does not allow for heat
recovery.
Mechanical ventilation
When planning the installation of mechan-
ically-operated ALDs, they must be posi-
tioned in such a way that the whole target
area is adequately ventilated. This means
that the airflow volume has to be calcula-
ted in accordance with nominal ventilation
(the minimum air exchange rate required for
maintaining hygienic and health standards)
without user support (window ventilation).
Fan-supported ventilation means that the
airflow volume can be exactly defined with
a differential pressure of up to 8 Pa. Such a
ventilation concept does not allow for heat
recovery.
3.2 Configuration
The ALD technical data can be configured
in a variable manner, allowing the set speci-
fications to be met. Generally speaking, the
parameters are influenced by the inside cov-
er, the number of soundproofing elements
(SDE) and their openings, the outside panel
and the wall thickness.
The configuration can be done using the
product-specific diagrams or the ALD calcu-
lation tool (available on the manufacturer‘s
website).
Sample configuration
Specifications:
» Existing wall thickness is 365 mm [cf. 1]
» Building project with high sound insu-
lation requirements (required standard
sound level difference: 51 - 55 dB) [cf. 2]
» 8 Pa differential pressure through the
use of a centrifugal fan in the bathroom
[cf. 3]
8 Pa
6 Pa
4 Pa
≥ 410 mm
≥ 330 mm
≥ 250 mm
1 2 3
35
30
25
20
15
10
5
0
60
55
50
45
40
56
51
49
53
48
47
46
44
44
31,0
15,6
26,4
20,1
9,8
16,8
6,9
12,0
14,6
2
4
1
3
We start by determining which system con-
stellations are possible for the given wall
thickness. This is done using the top dia-
gram showing the standard sound level dif-
ference and wall thicknesses. Once this has
been done, you can calculate the resulting
airflow volume using the bottom diagram.
1. Given the sample wall thickness of 365
mm, the chart for wall thicknesses ≥ 330
mm is used. The chart for wall thickness-
es ≥ 410 mm is not relevant in our case,
as the given wall thickness is much lower.
2. The required standard sound level dif-
ference of 51 - 55 dB further limits the
choice. In the present case, the required
normalized sound level difference can be