Network components

For home ventilation, you may need network components to regulate or purify the air.
There are registers to allow air flow or not, as well as backflow preventers for ventilation. To regulate air flow, consider installing an adjustable air flow regulator and adapt your products related to the MVHR (Mechanical Ventilation with Heat Recovery) with sleeves and other reductions suitable for circulating air in the ducting of single flow or double flow MVHR systems.
A healthy home is the best way to avoid microbes and mold on the walls.