b) Installing an air intake duct. A 100mm diameter pipe can be connected to the air
control damper inlet and channeled to the outside of the house. The length of this
pipe should be as short as possible and it should be ensured that the airflow is not
blocked and that the air current measured at one meter above the unit is 12Pa or
higher. This type of installation ensures that the combustion air always comes from
outside the house, preventing the circulation of unwanted air through the house.
This makes the installation airtight. As in the previous installation, holes (minimum
100cm2) will be required to ventilate the interior of the space where the
recuperator is installed.
Figure 25
If possible, it is advisable to install access from both sides, so that maintenance can
be carried out more easily in the future.
