52
Manual
–
AlphaAir Freshbox 25 Basic
but can be throttled down to reduced ventilation by an
integrated timer. This automatically maintains a fresh air
contribution that can be adjusted according to the room size
and individual sensation, below the hearing threshold.
12.4
Energy saving
It is incomprehensible why vast sums are spent on insulation
and tight windows, while the heat paid for is then only
ventilated out of the window unused.
If, for example, the air exchange rate of 0.5 h-1 specified in DIN
1946-6 is to be adhered to, the following example calculation
for determining the ventilation-related heating energy loss
results for an apartment with 120 m² of living space and a room
height of 2.5 m (outside temp. 0°C, room temp. 22°C):
Air exchange x area x height x air mass x energy x
Δ
T =
0,5
x 120 x 2,5 x 1,29 x 1,09 x 22 =
Amount of energy
4,64 MJ/h
In other words, you are irretrievably ventilating about 1.29
kWh out the window every hour. With a heat recovery of up to
90%, up to 1.16 kWh could be saved every hour if the
apartment were equipped with these devices.
