The　purpose　of　this　study　was　to　examine　whether　exposure　to　human　bioeffluents,　at　the　levels　recommended　by　the　current　ventilation　standards,　would　cause　any　effects　on　humans.　Ten　subjects　were　exposed　in　a　low-emission　stainless-steel　climate　chamber　for　4.25　hours.　The　outdoor　air　supply　rate　was　set　to　33　or　4　l/s　per　person,　creating　two　levels　of　bioeffluents　with　carbon　dioxide　(CO2)　at　500　or　1600　ppm.　Subjective　ratings　were　collected,　cognitive　performance　was　examined　and　physiological　responses　were　monitored.　The　results　show　that　exposures　to　human　bioeffluents　at　ventilation　rate　of　4　l/s　per　person　caused　sensory　discomfort　of　visitors,　reduced　pNN50　(a　domain　of　ECG　measurement),　but　did　not　produce　negative　effects　on　cognitive　performance　or　health　symptoms.　(C)　2017　The　Authors.　Published　by　Elsevier　Ltd.