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MEP Embodied Carbon

The Beginner’s Guide

Welcome to the Beginner's Guide to MEP Embodied Carbon, a comprehensive resource developed through cross-industry collaboration between MEP 2040 and the Carbon Leadership Forum. This guide addresses a critical gap in building decarbonization efforts by focusing on MEP systems, which can account for up to 27% of product stage embodied carbon, 52% of overall embodied carbon (excluding operational carbon), and 73% of whole life carbon. Whether you're new to embodied carbon concepts or looking to enhance your existing knowledge, this guide provides practical methodologies, material selection strategies, and actionable steps to measure and reduce the carbon impact of MEP systems. From detailed BIM takeoff techniques to real-world case studies, we've created this resource to empower manufacturers, designers, owners, contractors, and policy makers with the tools needed to move from measurement to meaningful carbon reduction in MEP systems.

Whether you're integrating MEP systems into your carbon assessments or looking to understand and reduce your systems' impact, this guide provides practical methodologies to move from measurement to meaningful action. We encourage you to download the guide, share it with your networks, and continue your valuable contributions to reducing MEP whole life carbon.

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The guide includes:

  • Detailed MEP BIM takeoff methodologies

  • Material selection guidance for high-impact systems

  • Default embodied carbon values for data-poor categories

  • Category-specific decarbonization strategies

  • Life cycle calculation breakdowns with uncertainty guidelines

  • A real-world case study: University of Illinois' Wymer Hall

  • Actionable steps for all stakeholders

Supplementary Resources

Data Entry Template: The MEP 2040 Data Entry Template helps you record both project specifications (climate zone, U-values, cooling capacity, etc.) and carbon data (material quantities, refrigerant leakage rates, etc.). This workbook is essential for the MEP Whole Life Carbon Pilot (started February 2025) and incorporates values from the Beginner's Guide to MEP Embodied Carbon (A4 transport factors, A5.3 waste rates, etc.)

Supporting Tools:

1. Piping System and Discipline Result Workbook: A workbook for organizing piping systems by discipline and recording their mass data from Revit before entering it into LCA software. Use alongside pages 12-16 in the Beginner's Guide to MEP Embodied Carbon.

2. Electrical Wiring to Closest EPD Estimator: Helps match the Revit takeoff wire lengths to the closest available Environmental Product Declaration (EPD). Use this workbook alongside the workflow described on pages 23-24 of the Beginner's Guide to MEP Embodied Carbon.

3. Wire to Conduit Estimator: Allows you to input feeder schedule details (associating conduit sizes with wire sizes) and total wire lengths gathered from Revit. The tool then scales these measurements to match an available 4" conduit EPD.