This tool provides some of the most common options on windows and doors and related NFRC certified values.

Energy performance data for select combinations of options is available in table format on each product page. To access those tables, select the individual product of interest and scroll down to the Professional Resources section.

This tool is a guide only and does not reflect variations resulting from features and options not included in the tool. For more information about the energy efficiency of specific products and options, please contact your local Marvin sales representative.

The National Fenestration Rating Council (NFRC) has developed and operates a uniform national rating system for the energy performance of fenestration products, including windows and doors. NFRC does not recommend product and does not warrant the suitability of product for any specific use. For additional information regarding this rating system, please visit The National Fenestration Rating Council website.

See Energy Efficient Windows and Doors for further information on this topic.

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