Investigation and analysis on classroom thermal environment in winter in Chongqing

Tests the thermal environment parameters of classrooms including the dry/wet bulb temperatures and air velocity and investigates the thermal comfort status using ASHRAE seven sensation scales by questionnaires. Suggests some measures to improve classroom thermal environment. Analyses the difference between the predicted mean votes and the actual mean votes, and proposes that the lower limited scope of classroom acceptable temperature in winter in Chongqing is 14.04 ℃.