Indoor Air Quality, Temperature and Cognitive Performance

Inclusion Criteria: * Adults between 18 to 40 years old * Western-European background * Generally healthy * No medication which may influence the outcome parameters. This will be determined on a case-by-case basis. Contraceptive uses for women are allowed and will be verified through a questionnaire. * Non-smokers or persons who quit smoking more than five years ago Exclusion Criteria: Participants, who do not want to be informed about unexpected medical findings, or do not wish that their treating physician will be informed, cannot participate in this study * Individuals with a diagnosed physical or mental disability or attention deficit hyperactivity disorder (ADHD) or depression * Any medication or medical condition that might interfere with the physiological outcome parameters or in some regards impair cognition * Unstable body weight (weight gain or loss \>3kg in the past three months) * Participation in another biomedical study within 1 month prior to screening visit * Shift workers * Colour blindness * Pregnancy * People with a low haemoglobin or haematocrit concentration * Not having visited or resided in a warm country in the last 3 months * Participants with asthma or restricted lung function due to allergies