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 multiplies BER-derived totals so they represent all households: scaler = Census household count ÷ BER count. The household count usually auto-fills from Census via community scoping. You can override it under Settings → Community Scaler (or with a GeoDirectory dwelling count if provided).
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.