COMcheck is a tool for showing design compliance with IECC rules. You can use COMcheck to demonstrate that your commercial or high-rise residential building design complies with the ASHRAE/IESNA Standard 90.1-2004 The American Society of Heating, Refrigerating and Air-Conditioning Engineers/Illumination Engineering Society Standard 90.1-2004 and ASHRAE/IESNA Standard 90.1-2007.

Quick Start:
Step 1: Select the appropriate code from the Code menu. If you don't know what code is applicable for your state/jurisdiction, review the Status of State Codes.
Step 2: Enter Project Information. Select the city/county where the building will be located; select the project type; add project details; select building use.

Step 3: Enter Envelope Components The building assemblies that provide a barrier between conditioned space and unconditioned space. This includes the floors, walls, and ceiling/roof assemblies of the building. Use the buttons to add the building components to be used in the building. Enter only the components that separate conditioned space A cooled or heated space, or an indirectly conditioned space from unconditioned space. You do not need to use every button. You may add as many components as you need to describe your building, including multiple components of the same type. If all components of one type (e.g., all exterior walls) have the same construction characteristics (e.g., all are wood-frame, 16" o.c. with R-13), you may add the square footage of all of the components of that type together and insert only one row into the table.

Step 4: Enter Lighting Information.
Step 5: Enter Mechanical Equipment.
Step 6: View/Print the Compliance Reports. When the compliance bar on the Envelope or Lighting screen shows that the building passes the code, select View/Print Report from the File menu and select the reports you wish to view/print.
Step 7: Save your data file using File->Save and your report file using File->Save Report.

The license of this software is Freeware, you can free download and free use this application software.