Table 1.
Scenarios used in the top-down and bottom-up analyses in the study
| Analysis | Scenario | Urban density | Energy efficiency* |
| Top-down | S25BAU | Low | Current initiatives |
| S50BAU | Medium | Current initiatives | |
| S75BAU | High | Current initiatives | |
| S25ADV | Low | Advanced | |
| S50ADV | Medium | Advanced | |
| S75ADV | High | Advanced | |
| Bottom-up | Frozen V1 | Medium | At year 2010 levels |
| Moderate V1 | Medium | Current initiatives with slow deployment | |
| Deep V1 | Medium | State of the art with fast deployment | |
| Moderate V2 | Medium | Current initiatives with fast deployment | |
| Deep V2 | Medium | State of the art with slow deployment |
*
Note that although energy efficiency refers to the efficiency in energy used for heating and cooling of unit floor area in the top-down analysis, it refers to the efficiency in building retrofit in the bottom-up analysis. The details of each scenario are provided in SI Appendix.