Ventilation resources

Ventilation resources

Downloadable resources

COVID-19 Ventilation Strategy

Winter advice

Air cleaners

Supplementary ventilation advice

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Technical Advice
Technical Advice: Ducted mechanical ventilation systems
Technical Advice: Ducted mechanical ventilation systems

Term 3 materials

Research and studies

Classroom ventilation study (January 2022)

The results from our study with NIWA to understand more about classroom ventilation further verified our COVID-19 classroom ventilation strategy.

The study involved looking at ventilation levels in typical classrooms being used as they normally are during the day. This was done by monitoring the amount of CO2, which indicates how much fresh air flow there is, in 18 different classrooms across three schools.

The study verified that good ventilation can be achieved in most naturally ventilated classrooms by opening windows and doors. The study highlighted the added benefits of opening windows and doors on different sides of the room, of introducing short breaks to periodically purge the room of stale air, and of supplementary assisted natural ventilation systems (e.g. extract/exhaust fans).

It also identified other areas for further research, including classroom ventilation in cold weather, and the effective use of portable air cleaners and other supplementary measures.

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NIWA rapid study
Download the results from our study with NIWA
Download the results from our study with NIWA

The Effectiveness of Natural Ventilation: A Case Study of a Typical New Zealand Classroom with Simulated Occupation

As a follow-on to the NIWA classroom ventilation study, this study assessed how the ventilation was impacted by different opening areas, by differing indoor versus outdoor temperatures, and by supplementary measures such as portable air cleaners and fans.

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Natural Ventilation
The Effectiveness of Natural Ventilation
The Effectiveness of Natural Ventilation

The Impact of Natural Ventilation During Winter on Thermal Comfort in Classrooms – A Systematic Literature Review

The aim of this study was to review the available literature on the impact of natural ventilation during winter on thermal comfort.

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Ventilation in Winter
Impact of Natural Ventilation in Winter on Thermal Comfort
Impact of Natural Ventilation in Winter on Thermal Comfort

The Performance of Portable HEPA Air Cleaners in Naturally Ventilated Classrooms

This report is the second of the two literature reviews, and summarises the current research on the performance of portable air cleaners used in naturally ventilated classrooms for the purpose of COVID-19 mitigation.

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HEPA Air Cleaners
HEPA Air Cleaners in Naturally Ventilated Classrooms
HEPA Air Cleaners in Naturally Ventilated Classrooms

Other online resources