The ATREA DUPLEX Flexi 3 650–6000 ventilation unit range is now PHI certified.

The "Atrea" line of ventilation units of the Duplex Flexi 3 650-6000 series not only has 6 options for ejection:

for floor installation, suspended and roof (left or right).

Not only are these units so versatile, but they can also be installed indoors or outdoors.

The entire range of Duplex Flexi 3 units is now certified by the Passive House Institute (PHI).

The size range in question is: 650, 1100, 1700, 2300, 3500, 4500, 6000.

Here is a link where you can view the relevant certificates for all sizes.

Among the criteria taken into account for this certification system are: energy efficiency, acoustic parameters, leakage level (Leakage Comfort), air quality, etc.