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October 2012

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factor and washer capacity of the replacement equipment. ENERGY STAR qualified

coin- or card-operated washers will have a water factor of 6.0 gallons per cycle per

cubic foot of capacity or less. An efficient multi-load washer will have a water factor

of 8.0 gallons per cycle per cubic foot or less.

Water Savings

To calculate water savings that can be achieved from replacing an existing coin- or

card-operated washer or multi-load washer, identify the following information and

use Equation 3-12:

••

Current water use as calculated using Equation 3-9.

••

Water use after replacement as calculated using Equation 3-9.

Where:

••

Current Laundry Equipment Water Use (gallons per year)

••

Water Use of Laundry Equipment After Replacement (gallons per year)

Payback

To calculate the simple payback from the water savings associated with replacing an

existing coin- or card-operated washer or multi-load washer with an ENERGY STAR

qualified model, consider the equipment and installation cost of the new equipment,

the water savings as calculated using Equation 3-12, 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. If the facility is

paying for the detergent used, this may reduce overall operating costs and reduce

the payback period.

Existing washer extractors or tunnel washers can be replaced with more efficient

laundry equipment.

Current Water Use

To estimate the current water use from a washer extractor or tunnel washer, use

Equation 3-11.