1 Energy Star Commercial Refrigerator & Freezer Deemed Calculation Analysis
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1
Energy Star Commercial Refrigerator & Freezer Deemed
Calculation Analysis
2
Issues
• Current “base case” specifications for Solid Door Refrigerators and Freezers appear to be set too low
• Current Energy Star specifications for Solid Door Refrigerators and Freezers also appear to be set too low
• Deemed Savings Calculator may be estimating savings that are too optimistic
• No Energy Star specifications for “transparent” door products
Share of CEC Listed Models Qualifying for Energy Star & CEE Tiers
Product Class
Meet Energy Star
Meet CEE Tier 1
Meet CEE Tier 2
Refrigerators – Solid Door 65% 65% 13%
Refrigerators – Transparent Door No Spec 31% 9%
Freezers – Solid Door 88% 88% 11%
Ice Cream Freezers – Solid Door 33% No Spec No Spec
Refrigerator/Freezers – Solid Door 28% No Spec No Spec
Refrigerator/Freezers – Transparent Door No Spec No Spec No Spec
4
Current Deemed Savings Calculation Baseline Efficiency Assumptions
Product DefinitionBaseline Use Assumption
Energy Star/
CEE Tier 1
Refrigerators – Solid Door 0.125V + 2.76 0.10V + 2.04
Refrigerators – Transparent Door 0.172V + 4.77 0.12V + 3.34
Freezers –Solid Door 0.398 V + 2.28 0.40V + 1.38
Refrigerator-Freezers – Solid Door 0.273 AV + 1.65 0.27AV - 0.71
Ice Cream Freezers – Solid Door 0.398 V + 2.83 0.39V + 0.82
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Energy Use of Energy Star and CEE Qualifying Models vs. All Available Models of Solid Door Refrigerators
y = 0.085x + 2.5961
R2 = 0.5179
0
2
4
6
8
10
12
14
16
0 10 20 30 40 50 60 70 80 90Model Volume (Cu.Ft.)
Da
ily C
on
su
mp
tio
n (
kW
h) Model Use
RTF Baseline (8/1/04CEC Std)
Energy Star/CEE T ier 1
CEE T ier 2
L inear (Model Use)
6
Energy Use of Energy Star and CEE Qualifying Models vs. All Available Models of Transparent Door Refrigerators
y = 0.126x + 4.8894
R2 = 0.49450
2
4
6
8
10
12
14
16
18
20
0 10 20 30 40 50 60 70 80 90Model Volume (Cu.Ft.)
Da
ily C
on
su
mp
tio
n (
kW
h)
Model Use
RTF Baseline (8/1/04CEC Std)
CEE T ier 1
CEE T ier 2
L inear (Model Use)
7
Energy Use of Energy Star and CEE Qualifying Models vs. All Available Models of Solid Door Commercial Freezers
y = 0.3098x + 3.5032
R2 = 0.8541
0
5
10
15
20
25
30
35
40
0 10 20 30 40 50 60 70 80 90Model Volume (Cu.Ft.)
Da
ily C
on
su
mp
tio
n (
kW
h)
Model Use
August 1, 2004 CEC Std
Energy Star/CEE T ier 1
CEE T ier 2
L inear (Model Use)
8
Energy Use of Transparent Door Refrigerators/Freezers
y = 0.4728x - 0.0874
R2 = 0.9145
0
10
20
30
40
50
60
70
10 20 30 40 50 60 70 80 90 100 110 120Adjusted Volume (Cu.Ft.)
Da
ily C
on
su
mp
tio
n (
kW
h)
Model Use
Linear (Model Use)
9
Energy Use of Energy Star Models vs.All Available Models of Solid Door Refrigerators/Freezers
y = 0.0992x + 6.8531
R2 = 0.4246
0
5
10
15
20
25
30
35
10 20 30 40 50 60 70 80 90 100 110 120
Adjusted Volume (Cu.Ft.)
Da
ily C
on
su
mp
tio
n (
kW
h)
Model Use
8/1/04 CEC Std
Energy Star
L inear (Model Use)
10
Energy Use of Energy Star and CEE Qualifying Models vs. All Available Models of Reach-In, Roll-In & Pass Through
Solid Door Refrigerators
y = 0.079x + 2.903
R2 = 0.476
0
2
4
6
8
10
12
14
16
0 10 20 30 40 50 60 70 80 90Model Volume (Cu.Ft.)
Da
ily C
on
su
mp
tio
n (
kW
h) Model Use
RTF Baseline (8/1/04CEC Std)
Energy Star/CEE T ier 1
CEE T ier 2
L inear (Model Use)
11
Energy Use of Energy Star and CEE Qualifying Models vs. All Available Models of Milk and Beverage Coolers Solid Door
Refrigerators
y = 0.0677x + 1.2201
R2 = 0.2546
0
1
2
3
4
5
6
7
0 5 10 15 20 25 30 35Model Volume (Cu.Ft.)
Da
ily C
on
su
mp
tio
n (
kW
h) Model Use
RTF Baseline (8/1/04CEC Std)
Energy Star/CEE T ier 1
CEE T ier 2
L inear (Model Use)
12
Energy Use of Energy Star and CEE Qualifying Models vs. All Available Models of Undercounter and Wine Coolers
Solid Door Refrigerators
y = 0.135x + 2.421
R2 = 0.189
0
2
4
6
8
10
12
14
0 5 10 15 20 25 30 35Model Volume (Cu.Ft.)
Da
ily C
on
su
mp
tio
n (
kW
h) Model Use
RTF Baseline (8/1/04CEC Std)
Energy Star/CEE T ier 1
CEE T ier 2
L inear (Model Use)
13
Energy Use of Energy Star and CEE Qualifying Models vs. All Available Models of Reach-In, Roll-In and Pass Through
Transparent Door Refrigerators
y = 0.118x + 5.444
R2 = 0.469
0
2
4
6
8
10
12
14
16
18
20
0 10 20 30 40 50 60 70 80 90Model Volume (Cu.Ft.)
Da
ily C
on
su
mp
tio
n (
kW
h)
Model Use
RTF Baseline (8/1/04CEC Std)
CEE T ier 1
CEE T ier 2
L inear (Model Use)
14
Energy Use of Energy Star and CEE Qualifying Models vs. All Available Models of Milk or Beverage Coolers
Transparent Door Refrigerators
y = 0.133x + 2.397
R2 = 0.797
0
2
4
6
8
10
12
14
16
18
0 10 20 30 40 50 60 70Model Volume (Cu.Ft.)
Da
ily C
on
su
mp
tio
n (
kW
h)
Model Use
RTF Baseline (8/1/04CEC Std)
CEE T ier 1
CEE T ier 2
L inear (Model Use)
15
Energy Use of Energy Star and CEE Qualifying Models vs. All Available Models of Solid Door Reach-In, Roll-In & Pass
Through Freezers
y = 0.310x + 3.503
R2 = 0.854
0
5
10
15
20
25
30
35
40
0 10 20 30 40 50 60 70 80 90Model Volume (Cu.Ft.)
Da
ily C
on
su
mp
tio
n (
kW
h)
Model Use
August 1, 2004 CEC Std
Energy Star/CEE T ier 1
CEE T ier 2
L inear (Model Use)
16
Energy Use of Energy Star and CEE Qualifying Models vs. All Available Models of Transparent Door Reach-In, Roll-In &
Pass Through Freezers
y = 0.76x + 5.29
R2 = 0.92
0
10
20
30
40
50
60
70
80
90
10 20 30 40 50 60 70 80 90Model Volume (Cu.Ft.)
Da
ily C
on
su
mp
tio
n (
kW
h)
Daily Energy Use kWh
8/1/04 CEC Std
Proposed RTF Baseline
L inear (Daily EnergyUse kWh)Y = 0.83x + 5.77
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Energy Use of Energy Star and CEE Qualifying Models vs. All Available Models of Solid Door Ice Cream Freezers
y = 0.38x + 2.24
R2 = 0.91
0
5
10
15
20
25
30
35
40
0 10 20 30 40 50 60 70 80 90Model Volume (Cu.Ft.)
Da
ily C
on
su
mp
tio
n (
kW
h)
Model Use
August 1, 2004 CEC Std
Energy Star/CEE T ier 1
L inear (Model Use)
18
Energy Use of Transparent Door Refrigerators/Freezers
y = 0.47x - 0.09
R2 = 0.91
0
10
20
30
40
50
60
70
10 20 30 40 50 60 70 80 90 100 110 120Adjusted Volume (Cu.Ft.)
Da
ily C
on
su
mp
tio
n (
kW
h)
Model Use
Linear (Model Use)
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Energy Use of Energy Star Models vs.All Available Models of Solid Door Refrigerators/Freezers
y = 0.00x3 - 0.01x2 + 0.62x - 1.82
R2 = 0.55
y = 0.10x + 6.85
R2 = 0.42
0
5
10
15
20
25
30
35
10 20 30 40 50 60 70 80 90 100 110 120
Adjusted Volume (Cu.Ft.)
Da
ily C
on
su
mp
tio
n (
kW
h)
Model Use
8/1/04 CEC Std
Energy Star
Poly. (Model Use)
L inear (Model Use)
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Revised Baseline Recommendations – Solid Door Refrigerators
Product Definition
Current Baseline Assumption
Proposed Baseline Assumption
Reach-In, Roll-In, Pass-Through Refrigerators – Solid Door 0.125V + 2.76
0.079V + 2. 90
0.100V + 2.04
Milk or Beverage Cooler – Solid Door Refrigerators 0.125V + 2.76
0.068V + 1.22
0.060V + 1.22
Undercounter & Wine Cooler – Solid Door Refrigerators 0.125V + 2.76 No Change
21
Revised Baseline Recommendations – Transparent Door Refrigerators
Product Definition
Current Baseline Assumption
Proposed Baseline Assumption
Reach-In, Roll-In & Pass Through Refrigerators – Transparent Door 0.172V + 4.77 0.118V + 5.44
Milk or Beverage Cooler – Transparent Door 0.172V + 4.77
0.133V + 2.40
0.120V + 3.34
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Revised Baseline Recommendations – Freezers
Product Definition
Current Baseline Assumption
Proposed Baseline Assumption
Reach-In, Roll-In & Pass Through Solid Door Freezers 0.398 V + 2.28
0.31V + 3.50
0.40V + 1.38
Reach-In, Roll-In & Pass Through Transparent Door Freezers 0.940 V + 5.10 0.76V + 5.29
Ice Cream Freezers – Solid Door 0.398 V + 2.28 0.38V + 2.24
Ice Cream Freezers – Transparent Door 0.940 V + 5.10 0.940 V + 5.10
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Revised Baseline Recommendations – Refrigerator/Freezers
Product Definition
Current Baseline Assumption
Proposed Baseline Assumption
Reach-In, Roll-In & Pass Through Solid Door Refrigerator/Freezers 0.273AV + 1.65 0.10AV + 6.85
Reach-In, Roll-In & Pass Through Transparent Door Refrigerator/ Freezers Not Covered 0.047AV - 0.087
Share of Existing RTF Baseline Refrigerator Models Above Proposed Revised RTF Baselines
Product ClassRevised Baseline
Reach-In, Roll-In & Pass-Through Refrigerators – Solid Door 71%/63%
Milk or Beverage Coolers – Solid Door 75%/65%
Undercounter & Wine Coolers – Solid Door 100%
Reach-In, Roll-In & Pass-Through Refrigerators – Transparent Door 53%
Milk or Beverage Coolers – Transparent Door 62%/71%
Share of Existing RTF Baseline Freezer Models Above Proposed Revised RTF Baselines
Product ClassRevised Baseline
Reach-In, Roll-In & Pass-Through Freezers – Solid Door 63%
Reach-In, Roll-In & Pass-Through Freezers – Transparent Door 26%
Ice Cream Freezers – Solid Door 76%
Ice Cream Freezers –Transparent Door 100%
Share of Existing RTF Baseline Refrigerator/Freezer Models Above Proposed Revised RTF Baselines
Product ClassRevised Baseline
Reach-In, Roll-In & Pass-Through Refrigerator/Freezers – Solid Door 96%
Reach-In, Roll-In & Pass-Through Refrigerator/Freezers – Transparent Door 24%
Share of Models Meeting RTF Baseline Efficiency That Would Qualify for Alternative Efficiency
Improvement LevelsAppliance Type 10% Better 15% Better
Milk Milk or Beverage Cooler w/Solid Doors or Beverage Cooler w/Solid Doors
44% 32%
Milk or Beverage Cooler w/Transparent Doors 29% 29%
Reach-In, Roll-In & Pass-Through Refrigerators w/Solid Doors 37% 19%
Reach-In, Roll-In, Pass-Through & Undercounter Refrigerators w/Transparent doors
27% 23%
Undercounter Refrigerator or Wine Cooler w/Solid Doors 35% Qualify for Energy Star
35% Qualify for Energy Star
Ice Cream Freezers w/Solid Doors 72% 38%
Ice Cream Freezers w/Transparent Doors 53% 29%
Reach-In, Roll-In & Pass-Through Freezers w/Solid Doors 26% 22%
Reach-In, Roll-In & Pass-Through Freezers w/Transparent doors
75% 67%
Reach-In, Roll-In & Pass-Through Refrigerator-Freezers w/Solid Doors
89% 89%
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