” I went up in the attic when it was about 80 deg outside to survey the situation and put a wireless Thermometer up there. It was anywhere from 100-110 deg when testing. Gathered readings from the attic for about a week , there was not a day where the attic temp was not at least 20 deg or more than the outside temp. From inside the attic I could see there were 3 of those non powered low profile roof vents. After looking at reviews and reading on the net I decided to install the attic fans. Installing the fans as others have mentioned is moderate for the DIY. I actually watched some YouTube videos of some pros and non pros to help me out before I started. I will just say the sawzall is your friend. I noticed when taking off the low profile roof vents , they were full of dirt and dust. Once the fans were installed the temp in the attic is @ or below the outside temp !! What this has done to the inside temp is nothing short of amazing. It was 80+deg outside and the temp on the inside at it’s peak was 74 deg.. with no AC that day or the day before. I’ve never had a temp that low in the house..without running the AC or unless it was less than that temp outside. Wish I would have installed this 6 years ago….it would have saved me money on summer electric bills..”