Page 103 - WaterSense at Work

October 2012
Commercial Ice Machines
Equation 4-2. Water Savings From Ice Machine Replacement (gallons per year)
= Current Water Use of Ice Machine –Water Use of Ice Machine After
Current Water Use of Ice Machine (gallons per year)
Water Use of Ice Machine After Replacement (gallons per year)
To calculate the simple payback from the water savings associated with replacing a
water-cooled ice machine, consider the equipment and installation cost of the re-
placement air-cooled model, the water savings as calculated in Equation 4-2, and the
facility-specific cost of water and wastewater.
The facility should also consider the energy impact of replacing old equipment.
While air-cooled machines are usually more water-efficient, water-cooled machines
are usually more energy-efficient. Some air-cooled units, however, are able to match
or exceed the energy efficiency of water-cooled units while also providing substan-
tial water efficiency.
Additional Resources
Alliance for Water Efficiency (AWE). Commercial Food Service Introduction.
AWE. Ice Machines.
California Urban Water Conservation Council. Resource Center, Commercial Food
Services, Ice-Makers.
Consortium for Energy Efficiency, Inc. July 1, 2011. High Efficiency Specifications for
Commercial Ice Makers.
DOE, Energy Efficiency & Renewable Energy, Federal Energy Management Program.
Covered Product Category: Air-Cooled Ice Makers.
East Bay Municipal Utility District. 2008.
WaterSmart Guidebook—AWater-Use
Efficiency Plan ReviewGuide for New Businesses
Pages FOOD3-5.
EPA and DOE’s ENERGY STAR. Commercial Ice Machines.
op. cit.