How Portfolio Manager calculates greenhouse gas emissions

Portfolio Manager calculates your building's greenhouse gas emissions (including carbon dioxide, methane, and nitrous oxide) from on-site fuel combustion and purchased electricity and district heating and cooling. Portfolio Manager also enables tracking of avoided emissions from any green power purchases.

The methodology for calculating greenhouse gas emissions in Portfolio Manager was designed to be consistent with the Greenhouse Gas Protocol developed by the World Resources Institute and World Business Council for Sustainable Development, and is compatible with the accounting, inventory and reporting requirements of the Center for Corporate Climate Leadership as well as other state and NGO registry and reporting programs.

While the emissions calculations are based on the amount and type of energy your building consumes, they have no bearing on its 1 – 100 ENERGY STAR score.

For more detailed information on emissions calculations, refer to the technical descriptions available in the following documents: