Estimate cumulative water saved by efficient fixtures and habits in homes and public buildings.
更换节水器具、缩短淋浴均可提升比例。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Fixture savings | 30-60% per use | China WELS |
| Water efficiency grades | Grade 1-3 | China WELS |
| Annual savings | S = per-use × freq × days × n | MWR standards |