in the eaves of the roof of my condo, there are vents to allow the roof to breath. These are rectangular, about 5-6 inches wide, and the length of the eve's overhang from the wall. I was planning to vent my dryer to one of these. I wouldn't be devoting one in its entirety, merely the first 4 inches of one, so I doubt I am upsetting how the roof breaths. There are also a few other vents of this type around the building, and vents on the pitch of the roof itself. Is it a good idea to do this? Is it possible? Would it be a better idea to vent it to one of roof vents?

seems like this problem is pretty common with two-story houses... downstairs is much cooler than the upstairs... in my case, the downstairs (with ceiling fan) is extremely nice right now (it's 90 degrees outside)... thermostat shows 78 downstairs, but I'm not sure where the measurement is actually being taken... When I walk upstairs (relatively enclosed staircase - 1 master BR, 2 small br/offices, 1 medium br, + bath all off a single hallway), the temperature increases noticeably as I walk up the stairs. (7 degree different standing in the hall) 3 of the upstairs rooms are all along the same wall of the house in a row. The rooms on either end are also about 7 degrees warmer, but the room in the middle was 11 degrees warmer... 89! This is a small room with a dehumidifier and small fan running if that matters... From reading online, I'm assuming that a major problem might be the return duct. Is the return duct the large hole where I change filters every few months? If so, this is located downstairs which means, if I understand, that the HVAC system is just pulling the already cool air from downstairs, cooling it again, and spitting it out upstairs... Is this right? If that is also right, generally how difficult would it be to add another return or just move the main return upstairs? If I'm wrong, how do I find the return? Is there another solution I should be looking for at the moment? As for the middle room, I typically leave the door closed as I do not want me cat going in this room. In my old house doing this (with dehumidifier and fan) actually kept the room cooler than the rest of the house... but here, it's just ridiculously hot. (The door to the similarly sized room on the end of the house is also typically closed although there is no fan/dehumidifier, nor is there much in there...) each room has a single window facing north; there are lots of trees out back, so there is rarely any direct sunlight through the window.) Any thoughts are much appreciated. Thank you!