Windows Energy Savings Estimator for Residential Buildings

This window savings estimator is an easy-to-use Excel-based calculator that will estimate the energy cost savings of the highly insulating windows and low-E storm windows available through the windows volume purchase program. You can compare the savings relative to other common windows or storm windows you may be considering purchasing, or the savings relative to your existing windows. We have also provided a document giving an explanation of the functions and assumptions for using this estimator.

If you are interested in the performance and savings of highly insulating windows and low-e storm windows for commercial buildings, see the Windows for High Performance Commercial Buildings website for design tools, resources and case studies.