sloeffle
Minister of Fire
Not to veer too far off topic. We are going to be replacing 10 el cheapo single hung windows this winter / spring with a really good Provia R-5 double pane double hung window. I agree with @brenndatomu that windows do not have a great of an ROI as some people make them out to be.I'm glad that I didn't replace them because I thought it was going to help with heating/cooling the house, because it didn't make a lot of difference. I think windows are often oversold for helping with heating/cooling.
However, we have 6 high end ( R-4 maybe R-5 ) double hung double pane windows in our house addition that never feel cold, have ice on them, or have condensation on them. The windows we are replacing have all of these things. I'd have to think that the cold air coming off of the older windows and dropping to the floor would cause the house to be colder. Will I ever see my $7,000 back, probably not, but everyone I've talked says their house feels "warmer". My feet are always cold so personally I think I'll feel "warmer". I will soon find out......