concentrations typical of occupied indoor spaces with good air exchange. - , ppm complaints of drowsiness and poor air - , ppm headaches, sleepiness and stagnant, stale, stuffy air. poor concentration, loss of attention, increased heart rate and slight nausea. > , ppm exposure may lead to serious oxygen...
concentrations typical of occupied indoor spaces with good air exchange. - , ppm complaints of drowsiness and poor air - , ppm headaches, sleepiness and stagnant, stale, stuffy air. poor concentration, loss of attention, increased heart rate and slight nausea. > , ppm exposure may lead to serious oxygen...
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