We completed the Model A blower prototype. Quick tests show it provides 1120 Pa at 277 LPM of flow. Materials List and Instructions are available. Be aware that this device is not FDA approved and while it exceeds NIOSH requirements of pressure and flow, it does not meet other NIOSH requirements such as a low battery or low pressure alarm.
Most other emergency PAPR blower units utilize 3d printed enclosures. In contrast, the Model A uses an off the shelf enclosure that’s available worldwide. This makes deployment of the Model A much faster.
Special thank you to our advisors: Pete in Wisconsin and Marc in Virginia.