Question

complete and incomplete ventilation​

Answer 1

Complete ventilation is the condition whereby the quality of the ambient or return air of a given space remains at a constantly maintained and desired level with a given constant quality of supply air.

In other words, all of the air supplied has been thoroughly distributed to absorb space odors, CO2, VOCs, excess humidity and dilute particulates to a stable degree consistent with the design objectives.  

A decrease in either the quality or quantity of the air supplied, causing a decrease in the space’s air quality, would be considered incomplete ventilation.

Incomplete ventilation is the condition whereby complete ventilation is not achieved.

This would be determined by several metrics including:

-An increase in space odors, CO2, VOCs, excess humidity and particulates above design parameters in the space served.

-A lower degree of space odors, CO2, VOCs, excess humidity and particulates in the return air extracted from the space, compared to the space itself. This would be an indication that some supply air is short-circuiting to the return path and diluting it before it has fully been circulated through the space.

Answer 2

COMPLETE VENTILATION

Complete ventilation is the condition whereby the quality of the ambient or return air of a given space remains at a constantly maintained and desired level with a given constant quality of supply air. ..

INCOMPLETE VENTILATION

A decrease in either the quality or quantity of the air supplied, causing a decrease in the space's air quality, would be considered incomplete ventilation. Incomplete ventilation is the condition whereby complete ventilation is not achieved.