{"id":49237231,"url":"https://github.com/IfcLCA/IfcLCA","last_synced_at":"2026-05-27T16:00:45.891Z","repository":{"id":245536523,"uuid":"772761198","full_name":"IfcLCA/IfcLCA","owner":"IfcLCA","description":"Open Source Life Cycle Assessment for Built Environment with Industry Foundation Classes","archived":false,"fork":false,"pushed_at":"2026-02-15T17:02:14.000Z","size":2926,"stargazers_count":37,"open_issues_count":8,"forks_count":5,"subscribers_count":1,"default_branch":"main","last_synced_at":"2026-05-15T14:04:43.203Z","etag":null,"topics":["ifc","ifcopenshell","lca","pyodide"],"latest_commit_sha":null,"homepage":"https://ifclca.com/","language":"TypeScript","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"agpl-3.0","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/IfcLCA.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null,"zenodo":null,"notice":null,"maintainers":null,"copyright":null,"agents":null,"dco":null,"cla":null}},"created_at":"2024-03-15T20:59:45.000Z","updated_at":"2026-05-13T19:24:09.000Z","dependencies_parsed_at":"2025-11-28T17:03:33.668Z","dependency_job_id":null,"html_url":"https://github.com/IfcLCA/IfcLCA","commit_stats":null,"previous_names":["ifclca/ifclca"],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/IfcLCA/IfcLCA","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/IfcLCA%2FIfcLCA","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/IfcLCA%2FIfcLCA/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/IfcLCA%2FIfcLCA/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/IfcLCA%2FIfcLCA/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/IfcLCA","download_url":"https://codeload.github.com/IfcLCA/IfcLCA/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/IfcLCA%2FIfcLCA/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":33406444,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-05-23T04:15:53.637Z","status":"ssl_error","status_checked_at":"2026-05-23T04:15:53.242Z","response_time":53,"last_error":"SSL_read: unexpected eof while reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["ifc","ifcopenshell","lca","pyodide"],"created_at":"2026-04-24T17:00:32.377Z","updated_at":"2026-05-27T16:00:45.879Z","avatar_url":"https://github.com/IfcLCA.png","language":"TypeScript","funding_links":[],"categories":["Industrial Ecology"],"sub_categories":["Life Cycle Assessment"],"readme":"[![License: AGPL v3](https://img.shields.io/badge/License-AGPL_v3-blue.svg)](https://www.gnu.org/licenses/agpl-3.0)\n![IfcOpenShell](https://img.shields.io/badge/IfcOpenShell-darkgreen?logo=ifcopenshell\u0026logoColor=black)\n![Next.js](https://img.shields.io/badge/Next.js-black?logo=next.js\u0026logoColor=white)\n![React](https://img.shields.io/badge/React-blue?logo=react)\n![Tailwind CSS](https://img.shields.io/badge/TailwindCSS-06B6D4?logo=tailwindcss\u0026logoColor=white)\n![TypeScript](https://img.shields.io/badge/TypeScript-3178C6?logo=typescript\u0026logoColor=white)\n\n## Overview\nIfcLCA leverages **openBIM** and **Open Data Standards** to analyze the environmental impact of construction projects through IFC files using Swiss **KBOB** environmental impact data from [lcadata.ch](https://lcadata.ch).\n\n## ✨ Features\n- 🏗️ **Project Dashboard** - manage multiple building projects and track their progress.\n- ⚙️ **IFC Processing** - upload and parse IFC files; inspect elements and materials.\n- 📚 **Materials Library** - centralize materials data across projects.\n- 📈 **LCA Charts** - visualize environmental impacts; export IFC with LCA results and get nice charts.\n\n## 🚀 Typical Workflow\n1. **Export your Model**\n   - IFC version: preferably IFC4 (2x3 works too)\n   - Include all *Ifc Base Quantities* (NetVolume or GrossVolume)\n   - Include assembly layers (prefer `IfcMaterialLayerSet`, `IfcMaterialConstituentSet` also supported)\n2. **Upload**\n   - Drop your IFC file in the upload area or click to browse\n   - Files are processed locally and never stored on our servers\n3. **Map Materials**\n   - Search the full swiss KBOB database\n   - Combine your materials with environmental impact data\n4. **Analyze Results**\n   - View impact metrics: GWP, PEnr, UBP and material breakdown\n   - Use charts to identify key contributors\n   - Enter project EBF (in m²) to toggle between absolute and relative emissions views (explanation below)\n5. **Export IFC with LCA Results**\n   - Upload your original IFC file to embed the LCA results\n   - LCA data (GWP, UBP, PENRE) is added as IFC property sets for each element\n   - The exported IFC can be used for further analysis, optimization, and interoperability with other BIM tools\n\n## 🛠 Tech Stack\n- **IfcOpenShell WASM** for Ifc parsing\n- **Next.js** \u0026 **React** for the frontend\n- **Tailwind CSS** for styling\n- **Clerk** for authentication\n- **MongoDB** for database\n- **TypeScript** throughout the codebase\n\n## 🌍 Open Source\nIfcLCA is and will always be Open Source. Sustainability is a team effort and requires trust and transparency. The project is released under the **AGPL-3.0** license.\n\n## 🔐 Data \u0026 Privacy\n- **Client-side parsing**: IFC files are parsed entirely in your browser using IfcOpenShell WASM\n- **No file storage**: Your original IFC files are never uploaded or stored on our servers\n- **Stored data**: Only derived metadata (elements, volumes, materials, classifications, and calculated indicators) is stored in the database\n- **Upload records**: Filename and processing metadata are stored to track upload history\n- **Deletion**: You can delete uploads and their derived data; orphaned materials are automatically cleaned up\n\n## 📦 Model Requirements\n- **IFC version**: IFC4 preferred (IFC2x3 is supported)\n- **Base Quantities**: export element volumes via Ifc Base Quantities (NetVolume or GrossVolume)\n- **Materials**: include assembly layers when possible (supports `IfcMaterialLayerSet` and `IfcMaterialConstituentSet`)\n- **Classification**: provide element classification codes for amortization lookup (see below)\n\n## 🧾 Classification Support\n- **Supported systems**: currently **eBKP-H** is supported for amortization years\n- **Unknown/missing classification**: falls back to a sensible default amortization period\n- Classification is read from your IFC model; set or correct it in your authoring tool or use [ifcclassify.com](https://ifcclassify.com)\n\n## 📐 Emissions Calculation\nIfcLCA computes three metrics using Swiss KBOB data:\n- **GWP** (Global Warming Potential)\n- **UBP** (Environmental Impact Points)\n- **PENRE** (Primary Energy Non‑Renewable)\n\n### Absolute emissions\n- Computed per material and summed per project\n- Formula (per material):\n\n$$\n\\text{absolute}_{\\text{metric}} = \\text{volume} \\times \\text{density} \\times \\text{factor}_{\\text{metric}}\n$$\n\n- Useful for total project impacts\n\n### Relative emissions (annual, per area)\n- Normalizes absolute emissions by amortization years and area\n- Formula:\n\n$$\n\\text{relative} = \\frac{\\text{absolute}}{\\text{amortizationYears} \\times \\text{area}}\n$$\n\n- Requires a valid calculation area and classification to derive amortization years\n\n### Units\n- **Absolute**\n  - GWP: `kg CO₂ eq`\n  - UBP: `UBP`\n  - PENRE: `kWh oil-eq`\n- **Relative** (per area and year; area unit defaults to `m²`)\n  - GWP: `kg CO₂ eq/\u003carea\u003e·a`\n  - UBP: `UBP/\u003carea\u003e·a`\n  - PENRE: `kWh oil-eq/\u003carea\u003e·a`\n\n## ⚠️ Known Limitations \u0026 Roadmap\n- **No built-in 3D viewer**: Currently no IFC geometry visualization\n- **Classification systems**: Only eBKP-H is supported\n- **Comparative analysis**: Project comparison and benchmarking features are in development\n- **Aditional environmental impact data sources**: Ökobaudat coming soon...\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2FIfcLCA%2FIfcLCA","html_url":"https://awesome.ecosyste.ms/projects/github.com%2FIfcLCA%2FIfcLCA","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2FIfcLCA%2FIfcLCA/lists"}