www.glendimplex.de
DOK4SVxxDEN · FD 9912
5
Domestic ventilation unit M Flex Air (Plus)
English
2 Intended use of the ventilation unit
2.1 Area of application
The ventilation unit is designed for controlled purging and ven-
tilation in frost-free living areas. Air ducts are used for the air cir-
cuit.
Connecting extractor hoods to the ventilation system is not
permitted. The ventilation unit is not designed for drying struc-
tures.
2.2 Functional principle
The ventilation unit is equipped with two energy-saving and
quiet running fans and provides for a controlled air exchange in
apartments and residential buildings.
Used air in the rooms with the highest levels of humidity and
odours is extracted as exhaust air and transported outside as
extract air through an air duct system. Examples of exhaust air
rooms include bathrooms and kitchens. At the same time, fresh
outside air is sucked in and brought into living rooms and bed-
rooms as supply air.
The two separate air flows are directed through a cross current
counter flow heat exchanger. This heat exchanger recovers
most of the heat from the exhaust air and uses it to heat up the
supply air. The building thus retains the majority of its heat en-
ergy.
The integrated bypass can direct outside air past the heat ex-
changer directly into the supply air rooms. Heat recovery is de-
activated in this case.
Hallways are usually overflow areas through which air flows
from supply air rooms to exhaust air rooms. An unhindered
overflow is achieved with undercut doors or overflow grilles.
Fig. 2.1:Schematic representation of supply/exhaust air system with heat re-
covery
The star-shaped structure of the air duct system shown, with
direct pipe sections between the air distributors and the supply
air/exhaust air valves
Simplifies the volume-flow balance and pressure balance
Avoids sound transmission from adjacent rooms
Simplifies cleaning due to direct pipe sections
1
Outside air (SAI)
A
Supply air area
2
Supply air (SAO)
B
Exhaust air area
3
Exhaust air (EAI)
C
Overflow area
4
Extract air (EAO)
5
Ventilation unit
6
Air distributor
7
Overflow air vent
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