Useful link

Tips and Advice for Extraction and Supply Air Commercial Fans.

Please read through the following for advice:

https://www.airah.org.au/Content_Files/HVACRNation/2009/June2009/HVACRNation2009-06-F01.pdf

https://www.airah.org.au/Content_Files/Divisionmeetingpresentations/ACTNSW/AIRAH-25-08-15-Brett-Fairweather.pdf

https://www.airah.org.au/Content_Files/Resources/Technical-Bulletin-Kitchen-Exhaust.pdf

https://www.airah.org.au/Content_Files/EcoLibrium/2016/Eco-10-16-002.pdf