In the air quality section, BREEAM scores both single and dual flow systems positively, although it depends on the outdoor air quality of the area. To ensure the required air quality levels, a dual flow system will be necessary as it filters outdoor air and provides better indoor air quality.

It should be noted that indoor air is two to five times more polluted than outdoor air. For this reason, simply ventilating—even with a single flow system—already improves indoor air quality.

Regarding visual comfort, a Siber ventilation system offers many design adaptation options thanks to its wide variety of duct types and accessories, including thermoplastic, rigid and flexible ducts, steel ducts, and insulated flexible and rigid ducts.

In terms of thermal comfort, ventilation system monitoring is highly valued as it allows control and regulation of CO2 and humidity levels based on user comfort.

For acoustic efficiency, we can highlight two important points:

• The Siber dual flow ventilation system is inherently very quiet when properly designed and sized. It also includes various acoustic dampers and silencers at different strategic points of the system to prevent possible noise.
• It isolates users from outside noise as it allows air renewal without needing to open windows.

Siber dual flow units are highly energy-efficient and low consumption. Not only do they consume very little energy on their own, but they also help reduce cooling and heating consumption thanks to the heat recovery unit.

The dual flow heat recovery ventilation system isolates users from outdoor noise pollution as it allows air renewal without needing to open windows.

For buildings located in Spain, BREEAM evaluates the environmental impact generated by transporting materials from the factory to the site. Since the Siber factory is located in Spain, the transportation environmental impact is lower compared to companies that manufacture abroad.

For controlled mechanical ventilation with heat recovery, Siber has started marketing products like the DF EVO unit, which is 99.9% recyclable.