Finding F-0658

“The presence of gas clothes dryers was significantly associated with increased indoor NO2 levels (47% in summer and 54% in winter).”

Sun Associations between residential fossil fuel combustion and indoor concentrations of nitrogen dioxide, carbon monoxide, and aldehydes in Canadian homes (2025). J Expo Sci Environ Epidemiol. Page 1. CKB 1157

Structure

Source: Natural gas
Factor: Nitrogen dioxide (NO₂)
Population: households
Setting: dwelling, CA
Study design: measurement of indoor NO2, CO, formaldehyde and acetaldehyde in 344 homes in four Canadian cities in winter and summer, with mixed models and general linear models relating concentrations to sources and housing characteristics, city-specific and pooled (class 4)
Effect: difference 47
Averaging time: summer season
Sample: 344 homes
Caveat: gas clothes dryers filed under natural-gas; no separate vocabulary slug

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.