Dr Pieter Peach on Nostr: Having worn nothing but the 3M 1870+ (left photo) for respiratory protection at work ...

Having worn nothing but the 3M 1870+ (left photo) for respiratory protection at work since it became widely available in Australia I’ve forgotten what it’s like wearing others. Today I wore a flat fold model (right photo) & realised why the work of breathing is so much higher in many of these models. It’s not necessarily the pressure drop over the filter media, but also the surface area available for filtering as most of the media can be flush to the skin (on my face)
npub17nl0p44xxz8xje3fry5dtdczskrsyjjrs02htxa8qjpwxccrvq3s4t9fuh (npub17nl…9fuh)