The article presents the evaluation of schoolchildren from five primary schools (classes' I-IV), located in Alba County. The presented methodologies stand for thoracic and respirable particulate matter, carbon monoxide, -dioxide, temperature, relative humidity and ventilation rate. The measurements were done in three classrooms, and one exterior point. The five locations were Unirea, Aiud, Alba Iulia, Sebeş and Vinţu de Jos. This article is in consistent with the measurement protocol for indoor and outdoor of the SINPHONIE project (Schools Indoor Pollution and Health Observatory Network in Europe), for physical and chemical measurements. [ABSTRACT FROM AUTHOR]