Which indoor fixtures are typically prioritized in WUE retrofit efforts?

• A. Toilets, urinals, faucets, and showerheads
• B. Lighting fixtures
• C. Refrigeration units
• D. Fire suppression systems

Answer: (A)

The key idea is to target indoor fixtures that use the most water and are used most often, because swapping them to low-flow versions yields the largest savings. Toilets and urinals contribute the biggest single draws in many buildings, and faucets and showerheads are used continuously throughout the day. Replacing older units with low-flow models and adding efficient aerators or flow-reducing features dramatically reduces daily water use, often with straightforward retrofits and solid payback.

In contrast, lighting, refrigeration, and fire suppression are not primarily about water use. Lighting is an energy issue, refrigeration savings come from cooling efficiency and ice machines rather than overall water usage, and fire suppression systems are safety-critical and governed by codes, making them poor targets for water-use retrofits. So prioritizing toilets, urinals, faucets, and showerheads makes the most sense for indoor WUE retrofits.