My son mistakenly purchased a flip without having me take a look first. The upstairs and attic are way too in the summer. I have an AC guy coming out to check the system but already know the attic has some issues. There is not enough insulation that we will address. The house is probably from the 60's or so. None of the houses in the neighborhood (or his) have soffit vents. He has a very small (maybe 4-6") soffit. He has a gable vent with a non working (or mounted) powered fan. I can mount this and ensure it works. From what I have read it was not unusual for houses from this era to be built w