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Supported Software Versions

The REScheck and COMcheck code compliance tools are designed to operate on the following operating systems and browsers. While REScheck/COMcheck may operate using older versions of the listed software, technical support will be limited to these versions. Instructions for determining what version number you are using may be obtained at whatversion.net.

As of 2026, the following software and versions are supported:

Operating Systems (Desktop)

Operating SystemREScheck (desktop) 
COMcheck (desktop)
WindowsWindows 7 
Windows 10
MacNot Supported
LinuxNot Supported

 

Browsers (Web)

BrowserREScheckWeb 
COMcheckWeb		Notes
FirefoxLatest stable version and previous 2 versionsSupported for most functionality
EdgeLatest stable version and previous 2 versionsChromium-based; fully supported
ChromeLatest stable version and previous 2 versionsSupported
SafariLatest stable version and previous 2 versions (MacOS/iOS)Supported for most functionality; minor UI differences possible
Internet ExplorerNot supportedDeprecated; use Edge instead

Related Content

COMcheck

COMcheck Logo
The COMcheck software and web tools simplify and clarify energy code compliance with the model energy code (IECC), standard (ASHRAE Standard 90.1), and a number of state-specific energy codes for commercial and high-rise residential building projects.

REScheck

REScheck Logo
The REScheck software and web tools simplify residential energy code compliance by automating trade-off calculations for the IECC and a number of state-specific codes.