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A water-saving shower head.
Nebia, Inc.

The Nebia showerhead was five years in design and development and employed aerospace engineering for its microatomizing technology. The showerhead produces hundreds or more droplets dispersed over five times the area of a regular shower. It is thirteen times more thermally efficient (the heat you feel on your body) and reduces water use by 70 percent compared to conventional showerheads and by 60 percent compared to the United States Environmental Protection Agency’s WaterSense showerheads.

Low-Flow Fixtures

Reduce SourcesElectricityEnhance Efficiency
Reduce SourcesBuildingsShift Energy Sources
0.91–1.56
Gigatons
CO2 Equivalent
Reduced / Sequestered
(2020–2050)
$1.48–2.37
Billion $US
Net First Cost
(To Implement Solution)
$477.91–765.46
Billion $US
Lifetime Net
Operational Savings
Cleaning, transporting, and heating water requires energy. More efficient fixtures and appliances can reduce home water use significantly, thereby reducing emissions.

Solution Summary*

Using water at home—to shower, do laundry, soak plants—consumes energy. It takes energy to clean and transport water, to heat it if need be, and to handle wastewater after use. Hot water is responsible for a quarter of residential energy use worldwide. Efficiency can be improved household-by-household and tap-by-tap.

In the United States, 60 percent of home water use occurs indoors, primarily for toilets, clothes washers, showers, and faucets. Low-flush toilets and efficient washing machines can reduce water use by 19 and 17 percent respectively. Low-flow faucets and showerheads and efficient dishwashers can also contribute. In total, these technologies can reduce water use within homes by 45 percent.

30 percent of home water use occurs outdoors, while another 10 percent is lost to leaks. Water use for irrigation can be reduced or eliminated by using captured rainwater, shifting to plants that do not require it, installing drip irrigation, or turning off the spigot entirely.

Local restrictions on water consumption and policies requiring efficient plumbing are highly effective. Product labeling can inform consumer choices, while incentives, namely rebates on purchases of efficient appliances and fixtures, can encourage voluntary action.

* excerpted from the book, Drawdown
Impact:

81-92 percent adoption of low-flow taps and showerheads by 2050 (up from 59 percent of estimated market) could reduce carbon dioxide emissions by 1-1.6 gigatons, by reducing energy consumption for heating wasted water. This would cost $1.4-2.3 billion and avoid an impressive $468-765 billion in water heating costs over unit lifetimes. Scaling other water-saving technologies would drive additional reductions. We model hot water only in order to calculate energy savings.