OUAZIA BOUALEM1; TARDIF MICHEL2; MACDONALD IAIN3; THOMPSON ALEXANDRA4; BOOTH DANIEL5

1) Research officer, National Research Council Canada, Intelligent Building Operation, boualem.ouazia@nrc-cnrc.gc.ca

2) Research Engineer in Built Environment, Natural Resources Canada, CanmetENERGY, Michel.Tardif@NRCan-RNCan.gc.ca

3) Research officer, National Research Council Canada, Intelligent Building Operation, iain.macdonald@nrc-cnrc.gc.ca

4) Research officer, National Research Council Canada, Intelligent Building Operation, alexandra.thompson@nrc-cnrc.gc.ca

5) Technical officer, National Research Council Canada, Intelligent Building Operation, Daniel.booth@nrc-cnrc.gc.ca

Previous research has shown that displacement ventilation system (DV) works well for regions where buildings require year-round cooling; however there are a growing number of buildings using this approach in Canada, where buildings require heating during winter months. This paper presents results from two field studies conducted in a school equipped with a combination of displacement ventilation and radiant heating system. The results show that the measured contaminant removal effectiveness is better than that predicted in previous studies for heating conditions. In addition, key predictors of thermal comfort are also generally within limits set by ASHRAE standards.

Keywords: displacement ventilation, radiant heating, heating season, predicted thermal comfort, contaminant removal effectiveness.