Abstract: An air filtration assembly including a filter and an air duct. The air duct defines an inlet, an outlet and passageway extending therebetween. The air duct further defines a filter-receiving portion for receiving the filter between the inlet and the outlet. The filter-receiving portion includes a filter-retaining surface extending substantially radially inwardly into the passageway. The filter-receiving portion includes a filter-securing assembly for securing the filter against the filter-retaining surface. The filter-securing assembly is selectively operable between a non-retaining configuration and a retaining configuration. In the non-retaining configuration, the filter is removable from the filter-receiving portion. In the retaining configuration, the filter is secured against the filter-retaining surface through the filter-securing assembly engaging at least in part the filter so as to bias the filter towards the filter-retaining surface.