There is provided a chassis for a computing system comprising a heat-generating element. The chassis comprises a body with at least a portion thereof made of a non-metallic material, namely a nonmetallic portion. For example, the non-metallic material can be a moldable plastic. There is provided a channel made in the non-metallic portion, the channel having a starting point close to a dedicated location for a fan, the channel having an ending point close to a dedicated portion for the heat-generating element, the channel shaped to guide fluid propelled at the starting point to the ending point. The channel can be a tunnel inside the body or a valley on the surface of the body, and confines fluid flow from the fan, guiding the fluid flow to the heat-generating element.