What to include in a classroom ventilation report
A useful report has six sections:
1. Executive summary (single page) — which rooms passed, which need attention, recommended action.
2. Methodology — what was measured, where, for how long.
3. Room-by-room CO₂ profile — heatmap of each room's 30-day CO₂ history, peaks and averages.
4. Pattern analysis — when do peaks occur (lesson type, time of day, day of week, weather).
5. Cost/benefit of remediation — for each underperforming room: simplest fix (open window, replace trickle vents, MVHR retrofit).
6. Recommended next steps — what to do this term, this year, this capital cycle.
1. Executive summary (single page) — which rooms passed, which need attention, recommended action.
2. Methodology — what was measured, where, for how long.
3. Room-by-room CO₂ profile — heatmap of each room's 30-day CO₂ history, peaks and averages.
4. Pattern analysis — when do peaks occur (lesson type, time of day, day of week, weather).
5. Cost/benefit of remediation — for each underperforming room: simplest fix (open window, replace trickle vents, MVHR retrofit).
6. Recommended next steps — what to do this term, this year, this capital cycle.
A worked example (anonymised)
A 28-classroom primary school, 30-day pilot, summer term 2026:
- 21 rooms operated within DfE guidelines (peaks below 2,000 ppm, average below 1,500 ppm) during occupied hours.
- 5 rooms peaked above 2,500 ppm regularly. All were first-floor classrooms with windows that had been painted shut during a 2024 redecoration.
- 2 rooms peaked above 3,000 ppm. Both were small group rooms used for SEN sessions — small volume, high occupancy, no openable windows.
Recommendation: replace painted-shut window mechanisms in 5 rooms (capital cost ~£3,500 total); install MVHR units in 2 small group rooms (capital cost ~£12,000); produce term-end follow-up report.
Result, term 2: all rooms operating within DfE guidelines.
- 21 rooms operated within DfE guidelines (peaks below 2,000 ppm, average below 1,500 ppm) during occupied hours.
- 5 rooms peaked above 2,500 ppm regularly. All were first-floor classrooms with windows that had been painted shut during a 2024 redecoration.
- 2 rooms peaked above 3,000 ppm. Both were small group rooms used for SEN sessions — small volume, high occupancy, no openable windows.
Recommendation: replace painted-shut window mechanisms in 5 rooms (capital cost ~£3,500 total); install MVHR units in 2 small group rooms (capital cost ~£12,000); produce term-end follow-up report.
Result, term 2: all rooms operating within DfE guidelines.
Download the template
Envora's classroom ventilation report template is available as a Word + PowerPoint pack to schools who run an air quality pilot with us. The template includes pre-populated chart placeholders, recommended remediation language, and a one-page summary suitable for governors.
Request a pilot and the template ships with your data.
Request a pilot and the template ships with your data.