What is the ENERGY STAR criteria for windows, doors, and skylights based on - whole-unit values?

Yes, the ENERGY STAR criteria for windows, doors, and skylights is based on the whole-unit. Be wary of marketing efforts that tout center-of-glass data or R-values as opposed to whole-unit data, as this is not a fully accurate representation of the energy efficiency of the product.  More information on ENERGY STAR qualified windows, doors, and skylights.

• I just got new ENERGY STAR windows. I can feel they are leaking. What should I do?
• Is it normal for moisture to collect on the outside of the window?
• My windows have storm windows. I am looking at replacing these windows with new ENERGY STAR qualified windows, but they don’t have a storm window. Does not having a storm window reduce their efficiency?