> For the complete documentation index, see [llms.txt](https://docs.enercalc.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.enercalc.com/efr-faq/modules-and-compatibility/what-versions-of-revit-is-enercalc-for-revit-compatible-with.md). # Supported Revit Versions What versions of Revit is ENERCALC for Revit© compatible with? ENERCALC for Revit compatibility follows a rolling 4-version schedule that aligns with Autodesk's licensing standard for Revit itself. EFR support is offered for the newest version of Revit and 3 previous versions. Each time a new year-version of Revit is released, support for the oldest version of Revit will be phased out of EFR and retired. For example: When the newest available version of Revit is 2023, then EFR will be available for Revit 2023, 2022, 2021, and 2020. When EFR for Revit 2024 is launched, then EFR for Revit 2020 will be retired. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.enercalc.com/efr-faq/modules-and-compatibility/what-versions-of-revit-is-enercalc-for-revit-compatible-with.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.