Date of Award


Document Type


Degree Name

Master of Science (MS)

Legacy Department

Civil Engineering

Committee Chair/Advisor

Blouin, Vincent

Committee Member

Klotz , Leidy


This study investigates the conditions under which it might be possible to implement a displacement ventilation system in a residential building. An experimental study of the impact on a mechanical air conditioning system of the vertical location of the inlet and outlet vents was performed. The four ventilation configurations of low inlet high outlet, low inlet low outlet, high inlet high outlet, and high inlet low outlet were compared. These four configurations were compared under 13 different heat load scenarios in a full scale instrumented model room. It was found that, for higher heat loads, the low inlet high outlet configuration was able to maintain approximately the same temperature in the occupied region as for a lower heat load, while developing a strong two layer stratification within the room such that the outlet temperature was significantly higher than the ambient temperature in the lower occupied region of the room. This was achieved because this ventilation configuration was able to stratify the temperature within the room and force the heat into the upper unoccupied region. From this zone the outlet was able to more efficiently remove the unwanted heat. The increased outlet temperature means that the inlet temperature can be closer to the temperature required for thermal comfort meaning that less pre-cooling of air is required. The results show that, even with only a 2.5 meter ceiling height, comparable to most residential applications, the displacement ventilation configuration was able to reduce the need for mechanical conditioning. This would have a noticeable impact on the energy requirements of a residential building.



To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.