NEGATIVE PRESSURE VENTILATION OF FRAMED FLOORS
RADON REMEDIATION
In order for the radon level in the house to be reduced, the air pressure under the foundation
slab must be lower than that in the house. If the house is on very porous earth, an installation
that can extract large volumes of air and can be controlled easily is usually necessary, all
depending on the individual instance. To achieve this, RS400 is connected to a pipe system
that sucks up an air/radon mixture under the foundation slab. Once the air/radon mixture has
passed the filter box the radon extractor blows it out into the surrounding air. ”One hundred
percent tightness is required on the pressure side.” The installation is designed and construct-
ed for continuous operation.
Negative pressure ventilation of framed floors means that heated air from the living
environment is drawn down into the floor. The odorous air in the floor is extracted
through a duct system that is connected to the fan unit. The RS400 fan unit, filter
box and the duct system that extracts the odorous air are mounted in suitably heat-
ed areas of the house, so they do not disturb the residential environment.
The extraction points are
positioned so that the air is
transported from the cold
area at the outdoor walls in
to the warmer area in the
middle of the construction.
This is to prevent condensa-
tion problems.
Function principle
If the installation is installed
with a filter box the box’s
filter must be replaced at
least twice a year.
The extraction points in the
concrete slab must be
positioned centrally, where the air
below the concrete slab is warmest
and not at outside walls.
RS400
Filter box
