Hello All. I’m after building a new PC using a Jeantech case, the case has two 120mm fans, and there is a space on the side of the case for an 80mm fan. There was a extendable funnel for the side fan. I have two questions. Should the side fan blow air out of the case or suck it in and should the funnel be extended fully down to the fan connected to the heatsink. If the side fan was to blow air into the case would it disrupt the heatsink fan.