3m Innovative Properties Company

3m Innovation Properties Company

Michael L Munson

Deepti Pachauri

Dennis M Glass

Mark A Sanocki

Brenda K Balderas

Fiona E Menken

Aloka Khanna

A method and system of determining air quality are disclosed. In examples, a method comprises identifying one or more aerosol particle types based on an absorbance spectra of aerosol particles captured on a filter and determining a mass concentration of each of the one or more aerosol particle types based on the absorbance spectra and the aerosol particle type. The method further comprises detecting a median particle size of each of the one or more aerosol particle types based on a rate of change of the absorbance spectra and the aerosol particle type. The method further comprises determining an air quality metric based on the identified one or more aerosol particle types, the determined mass concentration of each of the one or more aerosol particle types, and the determined median particle size of each of the one or more aerosol particle types.

Air quality assessment based upon optical absorbance

A framed air filter that includes air filter media and a frame with four frame portions. At least one frame portion includes an inner sidewall and an outer sidewall that meet at a sidewall junction. The sidewall junction extends along a score line that includes at least one cut-scored segment and one crush-scored segment.

Framed air filter with skip-scored sidewall junction

Growing community of inventors

Maple Grove, MN, United States of America

Michael L Munson