Please reference the WHO Technical Specifications for Ventilators for a full list.
Some key considerations include whether the device can:
Optimally utilize locally available oxygen and power supplies
Deliver pressures (Inspiratory pressure 0-40cmH20, PEEP 0-20 cmH20), respiratory rates (tailored to the desired patient population), tidal volumes (that include at least 4-10cc/kg for the desired patient population), and FiO2 (21-100%)
Provide standard alarms and monitoring, including plateau pressure and tidal volume measurements
Proven reliability to deliver ventilation reliably for consecutive weeks
Be utilized with viral filters and humidification systems
Includes control modes and modes for weaning (at least AC-VC, AC-PC and PSV)