Basic HTML Version

3-34

October 2012

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Washer’s water-efficiency factor in gallons per pound of fabric.

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Average number of pounds of fabric per load.

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Average number of loads per year.

Where:

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Water-Efficiency Factor (gallons per pound of fabric)

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Pounds of Fabric (pounds of fabric per load)

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Number of Loads (loads per year)

Water Savings

To calculate water savings that can be achieved from retrofitting an existing washer

extractor or tunnel washer, multiply the water use of the existing laundry equipment

as calculated using Equation 3-11 by the savings potential for the appropriate retrofit

option indicated in the Table 3-1 above (Equation 3-10).

Payback

To calculate the simple payback from the water savings associated with retrofitting

an existing washer extractor or tunnel washer, consider the equipment and installa-

tion cost of the retrofit option, the water savings as calculated using Equation 3-10,

and the facility-specific cost of water and wastewater.

Because washers use hot water, a reduction in water use will also result in energy

savings, further reducing the payback period and increasing replacement cost-

effectiveness. More efficient washers may also require less detergent, which may

reduce overall operating costs and reduce the payback period.

Coin- or card-operated washer or multi-load washers can be replaced with more ef-

ficient laundry equipment. Look for washers with the ENERGY STAR label.

Current Water Use

To estimate the current water use of a coin- or card-operated washer or multi-load

washer, use Equation 3-9.

Water Use After Replacement

To estimate the water use of a more efficient replacement commercial coin- or

card-operated washer or multi-load washer, use Equation 3-9, substituting the water