3 ms·
Wouldn't it just help to compare purifiers by setting them up in the same room in CA summer wildfire season and measuring the PM2.5 particles over time? How doe
by gvd 6y ago
Wouldn't it just help to compare purifiers by setting them up in the same room in CA summer wildfire season and measuring the PM2.5 particles over time? How does that POLAR crap compare to that?