50818 (2025). Dr Lawrence Xu-Nan to the Minister of Education

Written Question

Published date: 05 Nov 2025

Metadata

Document type:	Written Question
Parliament number:	54
Question number:	50818 (2025)
Question asked:	21 Oct 2025
Member asking:	Dr Lawrence Xu-Nan
Portfolio:	Minister of Education
Minister replying:	Hon Erica Stanford
Answer received:	02 Nov 2025
Status:	Question Answered
Reply type:	Reply
Document ID:	WQ_50818_2025
Document guid:	6d75d8f9-0923-4864-8cf5-fb6e73f5cfd6

50818 (2025). Dr Lawrence Xu-Nan to the Minister of Education: What trends, if any, have been observed in regards to CO2 concentration and ventilation in classrooms?

Hon Erica Stanford: Analysis of Internal Environment Monitoring data shows seasonal variation in CO₂ levels, with higher concentrations in winter due to potentially closed windows and doors for thermal comfort. Warmer seasons see improved ventilation and lower CO₂ levels. These trends highlight the positive impact of occupant behaviour and ventilation practices, with opportunities for further improvement through refresh breaks and preheating strategies.