ok this picture is tilted to the left just tilt your head left and u will see my setup clearly the tube on the bottom is my heater vent could this be used as a fresh air ven and i split it in halp the long tube on top is going to be my exhayst its about half way up the wall i really didnt wanna cut and holes in the walla it leads to a bathroom that has an exhaust fan do u think this could be a good exhause system if i put a fan in there i couldnt edit the photo and tilt the pic so just tilt your head to the left and u will see the image the way its sopposed to be srry and thanks for the help edit srry the pic didnt work but i can get an idea of what i am talking about