Do sustainability categories (i.e. Water, Energy, Thermal Performance) share scores?

Yes. Some criteria in each category may relate to the outcomes of another category in BASIX. Two examples of such instances would be:

1- Using water-efficient fixtures reduces the demand for hot water and thus, reduces the required energy to heat the water. This grants scores in both categories.

2- Going beyond a 7-star rating means that the building performs very well in reducing the demand for artificial heating and cooling. This means that the required energy for air-conditioning equipment will be reduced also.