Only homes that have been BER-assessed appear in the national register — often roughly 40–70% of a community. Without scaling, every baseline, retrofit, and 2030 figure would describe only that sample.
The community scaler expands BER-derived totals to every home in the community. The home count is your own count if you set one, otherwise SEAI’s GeoDirectory residences for the selected Small Areas, otherwise Census households. Complete BER records are expanded evenly to that count. Set your own count under Settings → Community Scaler.
What the scaler affects
- Residential energy, CO₂, and spend baselines
- Retrofit pipeline sizes and savings
- 2030 plan wedges that depend on housing stock
- Solar potential scaled to the full housing stock
It does not invent new BER certificates — fabric and band mix still come from the assessed sample. Treat the distribution as a strong guide to the stock, knowing unassessed homes are often older and worse-rated.