How the residential baseline is calculated

The community baseline on Residential → Energy Baseline is the figure the plan uses. It is built in three steps.

1. Each BER record gives the delivered energy for space heating, hot water, lighting and pumps, by fuel. Records missing any of these are left out and counted in the notes.
2. Every fuel is priced and converted once with the factors in Settings: € and CO₂ per delivered kWh, and a primary energy factor (grid electricity 1.785, fuels 1.1).
3. Appliances and cooking, which a BER does not model, add an assumed amount of electricity per occupied home (2,900 kWh a year by default, from SEAI’s national estimate). The average record is then expanded to every home in the community.

The certificate cross-check

The cross-check adds up the BER certificates themselves. Certificates use the conversion factors of their assessment year and cover only the loaded records, so the totals differ from the baseline; they are context, not a second baseline.