ENERGY STAR Freezer =kWhbase kWhEE ΔkWh – =(kWhbase- kWhEE)/Hours * CF ΔkWpeak Definition of Terms kWhbase = Annual energy consumption of baseline unit kWhEE = Annual energy consumption of ENERGY STAR qualified unit Hours =Hours of operation per year CF =Demand coincidence factor Where: CF = 1 Hours =8,760 Freezer energy use is characterized by configuration (upright, chest or compact), volume and whether defrost is manual or automatic and whether. If this information is known, annual energy consumption of the federal minimum efficiency standard model may be determined using Table 258. The efficient annual energy consumption (kWhEE) may be determined using models’ test data for the given model. Where test data is not available, the algorithms in manufacturers’ Table 258 for STAR maximum energy usage in may be used to determine “ENERGY kWh/year” efficient energy consumption for a conservative savings estimate. The term in the equations “AV” refers to which is AV = 1.73 x Total Volume. Note this table is also provided “Adjusted Volume,” for planning purposes to compare to the changing federal standards detailed in Table 260. Table : Federal Standard and ENERGY STAR Freezers Maximum Annual Energy Consumption if Configuration and Volume Known Federal Standard ENERGY STAR Freezer Category Maximim Usage in Maximum Energy kWh/year Usage in kWh/year Upright with manual defrost 7.55*AV+258.3 < 6.795*AV + 232.47 Upright with automatic defrost 12.43*AV+326.1 < 11.187*AV + 293.49 Chest Freezer 9.88*AV+143.7 < 8.892*AV + 129.33 Compact Upright with manual defrost 9.78*AV+250.8 < 7.824*AV + 200.64 Compact Upright with automatic defrost 11.40*AV+391 < 9.120*AV + 312.8 Compact Chest Freezer 10.45*AV+152 < 8.360*AV + 121.6 The default values for each configuration are given in Table 259. Note that a compact freezer is defined as a freezer that has a volume less than 7.75 cubic feet and is 36 inches or less in height.
ENERGY STAR Freezer ΔkWh =kWhbase – kWhEE ΔkWpeak =(kWhbase- kWhEE)/Hours * CF Definition of Terms kWhbase = Annual energy consumption of baseline unit kWhEE = Annual energy consumption of ENERGY STAR qualified unit Hours =Hours of operation per year CF =Demand coincidence factor Where: CF = 1 Hours =8,760 Freezer energy use is characterized by configuration (upright, chest or compact), volume and whether defrost is manual or automatic and whether. If this information is known, annual energy consumption of the federal minimum efficiency standard model may be determined using Table 258. The efficient models’ annual energy consumption (kWhEE) may be determined using manufacturers’ test data for the given model. Where test data is not available, the algorithms in Table 258 for “ENERGY STAR maximum energy usage in kWh/year” may be used to determine efficient energy consumption for a conservative savings estimate. The term “AV” in the equations refers to “Adjusted Volume,” which is AV = 1.73 x Total Volume. Note this table is also provided for planning purposes to compare to the changing federal standards detailed in Table 260. Table : Federal Standard and ENERGY STAR Freezers Maximum Annual Energy Consumption if Configuration and Volume Known Freezer Category Federal Standard Maximim Usage in kWh/year ENERGY STAR Maximum Energy Usage in kWh/year Upright with manual defrost 7.55*AV+258.3 < 6.795*AV + 232.47 Upright with automatic defrost 12.43*AV+326.1 < 11.187*AV + 293.49 Chest Freezer 9.88*AV+143.7 < 8.892*AV + 129.33 Compact Upright with manual defrost 9.78*AV+250.8 < 7.824*AV + 200.64 Compact Upright with automatic defrost 11.40*AV+391 < 9.120*AV + 312.8 Compact Chest Freezer 10.45*AV+152 < 8.360*AV + 121.6 The default values for each configuration are given in Table 259. Note that a compact freezer is defined as a freezer that has a volume less than 7.75 cubic feet and is 36 inches or less in height.
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