So in my house, on the lower level, there is one vent in the Family room. On the mail level, there are 2 vents in the living room, one in the bathroom, one in the kitchen and one in the dining room. On the upper level, there one in each bedroom (2) and one in in the bathroom.

So Yesterday afternoon I closed all the vents on the lower and main level.

Did it do what it was supposed to?

Well sure. Last night, sleeping was great. It was quite nice and cool up there. No sweating woo! there was a problem. The main level, where we spend most of our time, it got up to be 3 degrees warmer then it was supposed to be...meaning that the A/C ran through the evening. It stopped during the night sometime, cause the whole house cooled down enough, however, when I got home today the main level was still too warm.

So, test two. I have opened, fully, one vent on the main level (not in the room where the thermometer is), so then we'll see how that works out.