This is a tutorial HVAC video about " Basement Car Parking Ventilation Jet Fans System for calculation of airflow, Part-4" in Urdu/Hindi language. It is basic learning information about mechanical ventilation used in basements for high-rise buildings. This is an important video for HVAC or MEP technical staff or beginners. Here sharing my experience and knowledge that will be helpful to learn & grow for Junior Engineers & Technical staff. If you found anything which is inappropriate then convey it in the comments for my information and rectification in the future.

Tanweer Ahmed has explained in detail the following points:
1. How to calculate the airflow of tube axial fans?
2. This calculation is for both ductless and ducted-type fans.

You can watch relevant videos by the following links:
1. Basement Car Parking Ventilation Jet Fan System, Part-1
Link: https://youtu.be/VJ_E41nTDyM
2. Basement Car Parking Ventilation Jet Fan System, Part-2 Operation Sequence.
Link: https://youtu.be/Tds2O9yqLSw
3. Basement Car Parking Ventilation, Part-3 Placement of Jet Fans
Link: https://youtu.be/Y0OAyerM1VQ

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