This ritual introduces the act of air quality monitoring to the space of the home. Typically undertaken by community and activist groups, the window lung expands the spatial possibilities of air quality monitoring into the domestic sphere. It intends to function as an active spatial threshold that is designed to monitor air quality around landfills. Though it locates air quality monitoring in the home, the project suggests that domestic air quality monitoring be linked to the expertise of already active networks of air quality monitoring groups, bringing small, seemingly private concerns into conversation with charged, public struggles over air quality.