Finding F-1242

“The crawlspace air, coming directly from outdoors through designed vents, exhibited consistently low ozone levels (a mean value of 3.4 ppb), indicating substantial ozone loss in the crawlspace.”

Observing ozone chemistry in an occupied residence. Proceedings of the National Academy of Sciences of the United States of America. Page 2. CKB 0236

Structure

Factor: Ozone (O₃)
Population: two adult inhabitants of the house
Setting: dwelling with a crawl space, US
Study design: eight-week summer campaign in a normally occupied single-family house in California with two adult inhabitants: space- and time-resolved measurements of ozone and of volatile organic compounds by proton transfer reaction time-of-flight mass spectrometry in the living space, in the crawlspace and outdoors, with the indoor source strength of each compound regressed against the indoor ozone concentration (class 4)
Effect: mean 3.4
Caveat: the study reads the low level as substantial ozone loss in the crawlspace, possibly through titration by nitrogen monoxide from the pilot lights of the gas furnace and water heater standing there

A Finding records what one published document states, verbatim and with its page. It is not a conclusion of Coridum; see the Claims that build on it.