Comparing the performance of your proposed building design to a standard ‘baseline’ is a common practice among many energy-modeling workflows. This is especially true for any project seeking public funding to offset the costs of high-performance building components. However, constructing this ‘baseline’ model can be a time-consuming and error-prone task for modeling teams. This is where CarbonCheck comes in: a new tool specifically designed for New York State Passive House projects, designed to streamline the process of creating baseline models. CarbonCheck seamlessly integrates with both PHPP and WUFI-Passive software, ensuring compatibility and ease of use for any Passive House team.

CarbonCheck is an open-source tool, provided free of charge, created to support the Passive House Community in New York State. We encourage you to download and try it out for yourself.

Download the CarbonCheck Installer

Watch a YouTube Walk Through

Watch a detailed step-by-step walk through:


In order to successfully install CarbonCheck, please make sure that your system already has all of the required software installed and working:

Operating Systems

While CarbonCheck itself runs on both Windows and MacOS, note that WUFI-Passive itself is only compatible with Windows at this time.

Please Note: The CarbonCheck application does NOT include either WUFI-Passive, PHPP or Microsoft Excel. Those programs must be purchased separately in order to use them. CarbonCheck connects to and works with those tools, but is not a replacement for them.

Install Trouble?

If you run into any errors or trouble during install.

  • Make sure you are using the most up-to-date CarbonCheck installer version.
  • On Windows, be sure that you are installing the application to a folder that you have permission to add to. If you are having trouble installing to your “C:\ProgramFiles” directory, try installing to your root “C:" directory instead.
  • Still having trouble? Check out the Contact page for additional resources.