When looking for high performance windows, there is no really no difference between basements and above grade walls. Basement windows are often smaller than main floor windows, other than that, whatever performance of windows you decide to invest in would make sense for all floors. I would say your first stop would be finding windows that suit your climate, find out which climate zone you live in here. Other than that I would recommend reading over the following pages that will help you choose.
When looking for high performance windows, there is no really no difference between basements and above grade walls. Basement windows are often smaller than main floor windows, other than that, whatever performance of windows you decide to invest in would make sense for all floors. I would say your first stop would be finding windows that suit your climate, find out which climate zone you live in here. Other than that I would recommend reading over the following pages that will help you choose.
How to choose Windows & Doors for performance and durability
What's The Best Window Frame Material? Wood v Aluminum v Vinyl