We use the same Air-O-Cell cassette method the pros use for pre-treatment sampling. A technician pulls air from the rooms that were treated, a couple of unaffected living spaces for context, and an outdoor sample to set the day’s baseline.
That outdoor number matters more in Mapleton than people realize. Our dry mountain air keeps outdoor spore counts low most of the year, which means a house that’s holding moisture inside can read dramatically higher than the yard just outside the door. And a Utah County home buttoned up tight against a February inversion reads nothing like the same house in July with the windows open.
Every cassette ships to an accredited third-party lab for microscopic analysis, where the techs count spores by genus and compare your indoor numbers against the outdoor control. That comparison is the pass standard: indoor should come back lower than outdoor. You get the full lab report, not a tidied-up summary. On-site sampling usually wraps in about an hour, and lab results come back within three to five business days.
When we’re testing our own VaPURE treatments, we run the exact same protocol. We’d rather the lab prove the work than grade ourselves on a clipboard.