Thanks...your filter is no different than my compressor filtration...I thought the particulate was what you were measuring at "2ppm" ...now I see you were referring to CO...makes sense...but particulate is what AirNow is reporting/monitoring...not CO...and yes CO is the LCD of air quality..
What model of CO analyzer do your use and recommend?
Thanks again...
What model of CO analyzer do your use and recommend?
Thanks again...