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A-M Systems VB48Max viral rated PFT filters is my current preferred filter for BunnyPAPR. It has 99.99% viral reduction and MUCH lower flow resistance than any anesthesia circuit filter. Nearly doubles airflow compared to anesthesia filters.

Mount using the VB48Max filter adapters instead of usual 22 mm filter adapter.

Best configuration is using two filters. One VB48Max on inflow and ONE outflow with a VB48Max. This removes need for flutter valves and filters both inspired and expired gas. With dual direction filtering, a surgical mask is no longer required.

Surgical mask free and double the airflow makes this a very comfortable configuration.

Viral Filters (AM-systems VB48max) https://www.a-msystems.com/p-1160-vbmax-...

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