BIRDS - Energy Standards and Codes for Commercial Buildings

BIRDS - Building Industry Reporting and Design for Sustainability - allows users to compare the sustainability performance of a building type as the energy efficiency design of that building type is increased.

In BIRDS, sustainability performance includes:

  • operating energy use
  • life-cycle environmental performance of the building's materials, construction, and use
  • life-cycle cost performance

In BIRDS, sustainability performance can change with...

  • level of energy efficiency
  • location
  • building prototype
  • time horizon

Note: BIRDS does not allow for comparisons of performance across building types, nor different use profiles (e.g. occupancy activity) for a specific building type.

Steps to getting answers to your sustainability questions.

  1. Begin by telling BIRDS about the kind of building you are interested in.
  2. See how different aspects of sustainability for your building changes as its energy efficiency changes.
  3. Gain an interactive view of how sustainability performance changes as other key settings like
    location and time horizon change.

Access an introductory tutorial, documentation, and FAQ at the top right corner of the page.

Select the building prototype you want to evaluate.
My Building Prototype
Commercial Building


Size (ft2):

Shape (Ratio):

Floor Height:


Window Percent:

Heating Equipment:

Cooling Equipment:

Which building settings would you like to compare side by-side?

Your baseline settings will be used for the reference building in all comparisons.

Building Prototype:

Click on a state and then check the box for the desired city.
     ASHRAE 90.1-2004
     ASHRAE 90.1-2007
     ASHRAE 90.1-2010
     ASHRAE 90.1-2013
     ASHRAE 90.1-2016
     ASHRAE 90.1-2019

    Select your environmental preferences by setting the weights for each of the environmental impact categories.

    BIRDS includes 12 environmental impact categories for which the user can analyze the environmental performance of a building. BIRDS also allows a user to report a single, weighted average Environmental Impact Score (EIS). In order to calculate the EIS the user must define their preferences, or "weight set" regarding the relative imporance of each environmental impact. The user can select one of the pre-defined weight sets or create their own weight set.

    BEES Stakeholder Panel
    Carbon Footprint Only
    EPA Advisory Board
    Equal Weights
    My Weights
    Environmental Impacts BEES Stakeholder Panel Carbon Footprint Only EPA Advisory Board Equal Weights
    HH_Cancer 8 0 8 8.3
    Climate Change 30 100 18 8.3
    Acidification 3 0 5 8.3
    HH_Respiratory 10 0 7 8.3
    HH_Noncancer 5 0 5 8.3
    Ozone Depletion 2 0 5 8.3
    Eutrophication 6 0 5 8.3
    Smog 4 0 7 8.3
    Ecotoxicity 7 0 12 8.3
    Source Energy 11 0 7 8.3
    Land Use 6 0 18 8.3
    Water Consumption 8 0 3 8.3

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