Rescheck was created by the U.S. Department of Energy (DOE) to see that new structures adhere to energy efficiency demands. It can also be used to demonstrate compliance with local, state or federal energy codes for new homes, alterations or additions.

Each building assembly is assessed by Rescheck performing a U-factor x Area (UA) calculation. This calculation establishes the total heat loss (UA) in a house. If the total heat loss through the envelope of the building does not exceed the total heat loss from same building conforming to the code, then the software generates a report that declares the building is compliant with the code.

A Rescheck uses this calculated trade offs. It takes all parts of a home and puts them into an easy-to-read report with a pass or fail grade.