VAV vs Constant Volume HVAC Systems

When should you use a VAV System versus a Constant Volume HVAC System? See the important steps when choosing which of these systems to use and why.
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[@toyinorodare4072]

Thank you for this training very understandable

[@MEPAcademy]

You're very welcome!

[@elmz411]

Amazing video!

[@MEPAcademy]

Thanks for watching.

[@skillgsm1333]

If i change setpoint to higher value in all VAVs alll gets closed,what happens to the AHU which is running and all air outlets are closed

[@MEPAcademy]

That depends on the application. In some cases the code requires that the VAV terminals setback to their minimum position and not close fully. If for some reason all VAV's were 100% closed and this was an acceptable condition under the code of authority and application, then the AHU should be program to cycle off. Remember that ASHRAE 62.1 requires that occupied spaces be provided with a minimum rate of ventilation.

[@skillgsm1333]

@@MEPAcademy thank you so much for the information

[@toyinorodare4072]

Thank you for this training very understandable

[@MEPAcademy]

You're very welcome!