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REScheck

Getting Started

REScheck-Web™ is accessible directly from the website without having to download and install.

REScheck™ Desktop for Windows® may be downloaded and installed directly to your desktop.  

  • Download via the link at the bottom of the right sidebar.
  • See if your state or county can use REScheck to show compliance.
  • View a list of supported software versions for code compliance tools.

Note:  REScheck Desktop only supports compliance through the 2015 IECC. Support for the 2018, 2021, and 2024 IECC, as well as future codes, will only be available in REScheck-Web as eventually the Desktop version will become unsupported.

Residential Compliance Using REScheck™

The REScheck product group makes it fast and easy for builders, designers, and contractors to determine whether new homes, additions, and alterations meet the requirements of the IECC or a number of state energy codes. REScheck also simplifies compliance determinations for building officials, plan checkers, and inspectors by allowing them to quickly determine if a low-rise residence meets the code.

REScheck is appropriate for insulation and window trade-off calculations in residential detached one- and two-family buildings and multi-family buildings three stories or less in height above grade, such as apartments, condominiums, and townhouses. REScheck works by performing a simple U-factor x Area (UA) calculation for each building assembly to determine the overall UA of a building. The UA that would result from a building conforming to the code requirements is compared against the UA for your building. If the total heat loss (represented as a UA) through the envelope of your building does not exceed the total heat loss from the same building conforming to the code, the software generates a report that declares your building is compliant with the code.

For the 2024 IECC, the UA analysis is now called the Component Performance Alternative where the thermal conductance (TC) of the proposed building is the U-factor x Area (UA) calculation for each building assembly plus the slab F-factor x Slab Perimeter (ft) to determine the overall TC of a building.  The TC that would result from a building conforming to the code requirements is compared against the TC for your building. If the total heat loss (represented as a TC) through the envelope of your building does not exceed the total heat loss from the same building conforming to the code, the software generates a report that declares your building is compliant with the code.

REScheck Support

Have a compliance question or need assistance with the software?

BECP's team of building energy codes experts is available to answer specific questions submitted through our web-based help desk.

REScheck Technical Support Document

Updates to REScheck and COMcheck Building Energy Code Compliance Software

The U.S. Department of Energy (DOE) is directed to provide technical assistance to states to support the implementation of model residential and commercial building energy codes (42 USC 6833). As part of this assistance, the DOE Building Energy Codes Program provides ongoing support for REScheck and COMcheck compliance software, which are updated based on new editions of the model codes. DOE has published guidance surrounding its support for the software, including technical assistance requests for modified versions.

To receive updates from the Building Energy Codes Program, including newsletters, articles, compliance tool updates and more, subscribe to the our mailing list.

Subscribe to updates

To receive updates from the Building Energy Codes Program, including newsletters, articles, compliance tool updates and more, subscribe to the BECP mailing list.