Background: Natural gas-fueled stoves are a major source of indoor residential NO₂, which has been associated with asthma exacerbations. WE ACT for Environmental Justice launched ‘Out of Gas’ in 2021 to investigate the feasibility of transitioning from fossil fuels to renewable energy in affordable housing. 20 families in New York City Housing Authority units in the Bronx, New York City were selected to receive electric induction stoves to replace existing gas stoves. Air pollution (primarily NO₂ and PM2.5) and stove usage are being monitored before and after the transition. The pilot will be repeated in Buffalo, NY. Methods: In-kitchen stationary monitoring of NO₂, PM2.5, CO₂, and CO was conducted for 7 days at baseline and after stove switch-out using the Home Health Box (Access Sensor Technologies, Fort Collins, CO). Cooking events were identified using temperature loggers (Wellzion Electronics Technology Co, China). Pollutant concentrations were analyzed during cooking vs. non-cooking times and compared to ambient levels from nearby New York Department of Environmental Conservation stations. Results: Mean (SD) [median] NO₂ kitchen concentrations at baseline (before appliance switch-out) were 47.0 (60.6) [34.6] ppb, 27.8 ppb higher than ambient levels during the monitoring period. PM2.5 concentrations were 17.2 (40.1) [7.3] μg/m³, 7.9 μg/m³ higher than ambient levels. Levels of both pollutants were higher during cooking, with NO₂ averaging 117.5 (125.5) [82.3] ppb during cooking versus 35.5 (25.8) [32.5] ppb otherwise. The corresponding values for PM2.5 were 33.4 (63.7) [11.5] μg/m³ during cooking and 14.5 (33.8) [7.0] μg/m³ otherwise. On average, cooking was associated with an increase of 63.3 ppb NO₂ and 18.3 μg/m³ PM2.5 above baseline levels. Conclusions: Cooking with gas stoves contributes substantially to indoor residential NO₂ and PM2.5 concentrations. Switching to efficient electric induction stoves could reduce the exposure of potentially vulnerable populations to these pollutants. Keywords: NO₂, PM2.5, cookstoves