# Airflow Networks: J1V5, TM59 and Natural Ventilation

The [Airflow Network Mode](https://docs.betterbuilding.io/support-and-training/other-support/webinars/speckel-webinar-archive/broken-reference)l offers a comprehensive approach to simulating the performance of natural and forced air distribution systems within building, with a particular emphasis on multizone mixed mode or natural ventilation outcomes.

Typically, methodologies such as [CIBSE TM59](https://docs.betterbuilding.io/support-and-training/other-support/webinars/speckel-webinar-archive/broken-reference) or the incoming J1V5 Verification Method use airflow networks to establish overheating risk or theoretical heating and cooling loads.

On the 16th of May, Darren O'Dea (Director) provided a practical overview of Speckel's new air flow network features that enable projects to understand and model detailed natural ventilation strategies for compliance and beyond.

{% embed url="<https://www.loom.com/share/cd7603ed10ec40ec866f374efee28a0e?sid=febb10fd-4df6-4022-941d-2e21039ffb21?hide_owner=true&hide_share=true&hide_title=true&hideEmbedTopBar=true>" %}