In reply to @susandavidsonm2

Susan 🌊🦄😷#N95orBetter #LeadersAreNotLaggards

@susandavidsonm2 · Twitter · 2022-12-27 06:16 UTC

@sameo416 @Ikat0 @TulaGbefi @JimRosenthal4 This is interesting ⬇️ I had thought that flow rate dropped over time as filter "fills up" but @SmartAirFilters says that the efficiency drops as well: