After series of meetings, calls, messages and impressive brainstorms we have several conclusions, that we wanted to share with our community.
The visit in a hospital (which involved some test on anatomical models and long conversations with medical doctors) led us to one clue: we have to split the VentilAid into subsystems.
From the practical point of view it will consist of a base component with attachable upgrades, sorted by importance on the list below:
1. CPAP/BiPAP
2. Pressure & flow regulator
3. Measurement & output unit
4. Exhaled air decontamination unit.
5. The mask
So well, we (and you, our precious community) have much work to do. We would like to invite all active users to our bulletin board, accessible through this link:

http://www.ventilaid.org/forum/