Building characteristics, indoor environmental quality, and mathematics achievement in Finnish elementary schools
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Students in classrooms fulfilling the required ventilation rate (6 l/s per person) had higher mathematics test results.

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Ventilation rates were also associated with both perceived air quality and thermal comfort among students.

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Some 52% of the classrooms with fully mechanical ventilation met the current standards, whereas all other classrooms failed.

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Other factors related to ventilation adequacy were HVAC upgrade and number of students in classrooms.

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The results did not indicate a need to increase ventilation rate above the current standards.

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