Yes. From the monitor I discovered that co2 in my home office rises from around 700ppm to 1200ppm in just a few hours unless I open a window or the door. Now I

Yes. From the monitor I discovered that co2 in my home office rises from around 700ppm to 1200ppm in just a few hours unless I open a window or the door. Now I generally leave the window a little open or if the neighbours have their fire down I just open the door to the hall.