The Water Efficiency Prerequisite for Indoor Water Use Reduction in LEED AP ID+C V4 focuses on

reducing the aggregate indoor water consumption by 20 percent from the baseline. This includes

water usage by appliances such as residential clothes washers and dishwashers, which are common

contributors to indoor water use.

Reference: The LEED v4 Indoor Water Use Reduction Calculator provides guidance on the baseline

water consumption for various fittings and fixtures, including residential appliances1. Additionally,

the LEED v4: Interior Design + Construction Guide outlines the requirements for achieving the

prerequisite, emphasizing the reduction of indoor water use through efficient appliances2.

In the Water Efficiency Prerequisite for Indoor Water Use Reduction, the focus is on reducing potable

water usage through efficient fixtures and appliances. The eligible appliances that fall under this

prerequisite are residential clothes washers and dishwashers, as they are commonly used appliances

within buildings and contribute to indoor water use. These appliances must meet certain efficiency

standards, such as being ENERGY STAR certified or equivalent, which ensure they use less water than

conventional models.

Reference: Specification of appliances under the Water Efficiency Prerequisite for Indoor Water Use

Reduction, which includes standards and requirements for residential clothes washers and

dishwashers, among other appliances .