One of those instruments is a particle size magnifier—scanning mobility particle ... particle emissions between indoor and outdoor atmospheric environments. Since indoor air quality is largely ...

We typically spend 80% of our time indoors, where the quality of the air we breathe depends on the age and type of building ...

Yet, research into indoor air quality has historically taken a back seat to other ... they still performed better than new and more expensive HEPA air filters for the larger particle size and ...