Older windows are often built using old growth lumber. There are a couple things you can do instead of replacing the windows. Consider installing sorm windows. There are also interior storms. Indo Window is a removeable option. There are also companies that can replace the single panes with double panes low E or gas filled. That preserves the character of the house and if they are taken care of they will outlast many of the newer window options.

Energy star refrigerators are not always the ones that use the least energy. Instead look on the energy labels that they have and choose the one that uses the least amount for the space you have. In my opinion smaller is better. Energy star tend to label just the big ones and that encourages waste.