u/Annatta-vihara

My 22 year old son stays in his room all of the time except when he drives to his undergrad classes once or twice a week. He even eats his meals in his room. I checked CO2 levels in his room, it is 886 ppm compared to the rest of my house which is 571 ppm. He complains of low energy and fatigue and I am worried it could be linked to the air quality of his room. Is my concern correct?