Consider installing permanent water metering for ongoing monitoring of the project’s water use. A sub-metering system can help operations staff detect problems early and facilitate future LEED-EBOM certification.
Isolating mechanical equipment noise and installing low-noise and low-velocity equipment, including fans and boxes, will help project teams meet the Background Noise Level requirements. Audiovisual equipment, plumbing, lighting, and noisy sites can also affect background noise but are not required to be considered for this prerequisite but will need to be accounted for in EAc9; Enhanced Acoustical Performance.
Specify signage for water strategies that may require special instructions for use. This may include occupant signage for operating dual-flush toilets, indicating non-potable water, and operational signage for distinguishing pipes carrying reused water.
The sound absorption coefficient for each material can be obtained from the product manufacturer or by using generally accepted measurements. The LEED 2009 Reference Guide includes a table listing the sound absorption coefficient for some common materials, and other sources of absorption coefficients are also available.
Untreated rainwater, graywater, and blackwater may corrode plumbing systems, or lead to biological growth. Teams should plan for water treatment, filtration, or using corrosion-resistant materials. The use of seawater for toilet flushing, although very uncommon, can cause similar problems.
For residential projects, showers typically use more water than any other fixtures due to the duration of use. For commercial projects, toilets and urinals typically use more water. Water-saving strategies should target the most consumptive fixtures to achieve greatest water reductions.
