pane opens (single hung) will cost less than one where both panes open (double hung).
6. choose your time of year. you may be in a better position to negotiate a good deal at a less busy time of year, when the company is more in need of the business. around the beginning of december is often a quiet time.
7. get all your windows done at once. not if you don’t need them done, obviously; but if you think you might need to replace them all in the not too distant future, you may as well go for it now. the price per window will be less, because a week’s work 