Tasked to build a low-cost, easily manufacturable ventilator, that uses 3D printing for the key gas control manifold (the design will be amenable to high volume injecting molding). Designed an optimal way to build such a device by designing a scaled-up version of a “microfluidic array” to regulate the air flow. By 3D printing a single manifold that contains all the tubing, control valves and sensors, the design can eliminate the need for complex assembly and reduce the overall number of parts and cost of the device.