Windows
Install weather stripping where there are air gaps.
Consider installing energy efficient windows with a NFRC (National Fenestration Rating Council) Rating of 0.40 or less (SHGC and U-Factor). [U-Factor is an indication of the amount of heat that moves through window. The lower the U-Factor the better. The Solar Heat Gain Coefficient (SHGC) indicates the amount of solar energy that passes through window. The lower the better]. Also, make sure to check for utility rebates.
