Also have a uHoo. Kind of hate the UI, but it seems like a decent sensor. While my CO2 spikes during cooking on gas, fortunately NO2 remains low. 5-15 ppb rang

Also have a uHoo. Kind of hate the UI, but it seems like a decent sensor. While my CO2 spikes during cooking on gas, fortunately NO2 remains low. 5-15 ppb range. My gas furnace is in the basement, several floors away from my apartment.