Location-based emission factor reference log

CRREM v2.07 + EPA + NGA + ESPM

While this naming convention is practical, it:

This reference log addresses those gaps by documenting the full composition of each default set.

Each tool updates on its own schedule. Within the Risk Assessment Tool, updates to regional emission factors are not released simultaneously. Different regions and energy types may be updated at different times, which is why a single Scaler default set may reference multiple CRREM versions across regions.

Example:

A Scaler set might reference:

This is intentional and reflects CRREM's actual release pattern. Scaler draws from both tools to provide the most current data available.

For more on CRREM methodology, see Location-based emission factor methodology.

Table structure

For each version, the table shows:

Each cell lists the reference dataset and version used for that specific region and energy type.

Where a reference has changed compared to the previous version, it is highlighted & bolded to make updates easy to identify.

Where a reference lists "CRREM projections", this indicates:

Example:

Electricity reference: EPA v2023 (+ CRREM rate-of-decarbonization)

This means:

For methodology on how projections are calculated and applied, see Location-based emission factor methodology — Projection methodology.

CRREM publishes multiple tools, each serving different purposes:

Scaler draws from both tools, which is why a single Scaler default set may reference multiple CRREM versions.

"CRREM conversion factor" for DHC:

CRREM does not publish a standalone dataset for district heating & cooling. Instead, CRREM provides a conversion factor (0.876340396) that is applied to the electricity emission factor.

Where the table shows "CRREM conversion factor," this indicates:

DHC_EF = ELECTRICITY_EF × 0.876340396

For full methodology, see Location-based emission factor methodology — District heating & cooling.

"CRREM UK average" for natural gas:

Scaler applies CRREM's UK average natural gas emission factor globally for consistency across regions.

"Energy Star Portfolio Manager" for other fuels:

Energy Star Portfolio Manager provides emission factors for fuel oil, kerosene, district hot water, district chilled water, and other fuels not covered by CRREM.

CRREM North America and Europe → v2.07

CRREM → v2.05 eGRID → v2023

References added for AUS and USA in February 2025