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Emily Zachery
Dan Lauf
D&R International
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Agenda
• Proposed Draft 1 Window Criteria
• Proposed Draft 1 Door Criteria
• Proposed Draft 1 Skylight Criteria
• Comment Period
2
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Agenda
• Proposed Draft 1 Window Criteria
• Proposed Draft 1 Door Criteria
• Proposed Draft 1 Skylight Criteria
• Stakeholder Meeting
3
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V6.0 Draft 1 Criteria
• Overview
• Technological Feasibility & Product
Availability
• Cost-Effectiveness
• Aggregate National Energy Savings Potential
• Possible Considerations for V7.0
4
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Proposed Criteria
Climate Zone U-Factor SHGC
Northern ≤ 0.27 Any
Trade-Off = 0.28 ≥ 0.32
North-Central ≤ 0.29 ≤ 0.40
South-Central ≤ 0.31 ≤ 0.25
Southern ≤ 0.40 ≤ 0.25
Climate Zone U-Factor SHGC
Northern ≤ 0.30 Any
Trade-Offs = 0.31
= 0.32
≥ 0.35
≥ 0.40
North-Central ≤ 0.32 ≤ 0.40
South-Central ≤ 0.35 ≤ 0.30
Southern ≤ 0.60 ≤ 0.27
Current Criteria
5
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V6.0 Draft 1 Criteria
• Overview
• Technological Feasibility & Product
Availability
• Cost-Effectiveness
• Aggregate National Energy Savings Potential
• Possible Considerations for V7.0
6
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Technological Feasibility
& Product Availability• NFRC CPD Data Analysis
• Products Available for Sale Methodology
• Availability of Low U-Factor Windows
• Glazing Level and Gas Fill
• Glass Type
• Frame Materials
• Exploration of Select Alternate Proposals
7
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NFRC CPD Data Analysis
8
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NFRC CPD Data Analysis
9
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Products Available for
Sale Methodology
10
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CPD versus PA Analysis
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Availability of Low U-
Factor Windows (CPD)
12
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Availability of Low U-
Factor Windows (PA)
13
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Glazing Level (CPD)
14
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Glazing Level (PA)
15
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Glazing Level and Gas Fill
(CPD)
16
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Glazing Level and Gas Fill
(PA)
17
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Glass Type: Surface 4
(CPD)
18
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Glass Type: Whole-Product
VT for Low SHGC (CPD)
19
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Glass Type: COG VT for
Low SHGC (CPD)
20
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Frame Materials (CPD)
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Frame Materials (PA)
22
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Exploration of Select
Alternate Proposals• Allow any SHGC in North-Central
– ES would not meet code
• Establish minimum SHGC in
Northern Zone
U-Factor ≤ 0.27Double- and Triple-Pane Double-Pane Only
Number Percent Number Percent
SHGC ≥ 0.32 4,562 0.77% 1,489 0.31%
SHGC ≥ 0.40 933 0.16% 87 0.02%
Windows in CPD
(“Products Available for Sale” database contained no windows meeting
these criteria)
23
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V6.0 Draft 1 Criteria
• Overview
• Technological Feasibility & Product
Availability
• Cost-Effectiveness
• Aggregate National Energy Savings Potential
• Possible Considerations for V7.0
24
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Cost-Effectiveness
• Incremental Product Costs
• Household Energy Savings
• Payback
25
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Incremental Product
Costs• Calculated two sets of incremental
product costs
– Cost increase from V5.0 to V6.0
(to evaluate manufacturer cost)
– Cost increase from IECC 2009 to V6.0
(to calculate payback for consumer)
Zone U-Factor SHGC V5 to V6 IECC ‟09 to V5 IECC „09 to V6
Northern 0.27 Any$34.00
$173.00 (incl. trips)+ $20 $54.00
North-Central 0.29 0.35 $28.00 + $20 $48.00
South-Central 0.31 0.25 $21.00 + $20 $41.00
Southern 0.40 0.25 $13.00 + $20 $33.00
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Household Energy
Savings• Same methodology and assumptions as
previous criteria revision
• Modeled two baselines
– Single-pane clear
– Double-pane clear
• Calculate marginal savings of V6.0 over
both baselines
• Double-clear used to determine payback
27
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Payback
• Average window lifetime 20-30 years
• Payback for Los Angeles Excluded
– Extremely low baseline energy usage
• Median simple payback 11 years
• Mean simple payback 13 years
Climate Zone Mean Payback Period
Northern 14 years
North-Central 16 years
South-Central 15 years
Southern 6 years
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V6.0 Draft 1 Criteria
• Overview
• Technological Feasibility & Product
Availability
• Cost-Effectiveness
• Aggregate National Energy Savings Potential
• Possible Considerations for V7.0
29
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Aggregate National
Energy Savings over V5
Northern24%
North-Central
21%
South-Central
10%
Southern45%
Full assumptions and methodology at http://windows.lbl.gov/energystar/version6/
2.21 tBtu
Total First Year Savings
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V6.0 Draft 1 Criteria
• Overview
• Technological Feasibility & Product
Availability
• Cost-Effectiveness
• Aggregate National Energy Savings Potential
• Possible Considerations for V7.0
31
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Possible Considerations
for Version 7.0• Program Elements Considered
during Version 6.0 Criteria Revision
• Program Elements Unchanged
during Version 6.0 Criteria Revision
• Future Codes
• Most Efficient Program
• Emerging Technologies
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Agenda
• Proposed Draft 1 Window Criteria
• Proposed Draft 1 Door Criteria
• Proposed Draft 1 Skylight Criteria
• Comment Period
33
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V6.0 Draft 1 Criteria
• Overview
• Technological Feasibility
• Cost-Effectiveness
34
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Proposed Criteria
Glazing Level U-Factor SHGC
Opaque ≤ 0.17 No Rating
≤ ½-Lite ≤ 0.23 ≤ 0.25
> ½-Lite ≤ 0.30 ≤ 0.25
Glazing Level U-Factor SHGC
Opaque ≤ 0.21 No Rating
≤ ½-Lite ≤ 0.27 ≤ 0.30
> ½-Lite ≤ 0.32 ≤ 0.30
Current Criteria
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Technological Feasibility
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Technological Feasibility
37
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Technological Feasibility
Glazing Level Percent Qualifying
Opaque 77%
≤ ½-Lite 77%
> ½-Lite 67%
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Technological Feasibility
83% of Full-Lite Doors have SHGC ≤ 0.25 39
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V6.0 Draft 1 Criteria
• Overview
• Technological Feasibility
• Cost-Effectiveness
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Cost-Effectiveness
• Incremental Product Costs
• Household Energy Savings
• Payback
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Incremental Product
Costs• Initial incremental product costs only
included switching from V5.0 ES to V6.0
• For cost-effectiveness, IECC 2009
makes more sense as a baseline
• Requesting data accordingly in report
• Data shows spec change not cost-
prohibitive for manufacturersGlazing Level U-Factor SHGC V5.0 to V6.0
Opaque ≤ 0.17 No Rating None
≤ ½-Lite ≤ 0.23 ≤ 0.25 $13.00
> ½-Lite ≤ 0.30 ≤ 0.25 $30.0042
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Household Energy
Savings• Opaque Doors
– V6.0 spec matches performance of best-
selling products
– No delta in spec = no energy savings
– Also no marginal cost
• Less than/Equal to Half-Lite Doors
– Zero to $2 per year
• Greater than Half-Lite Doors
– Marginal savings (RESFEN rounds to zero)
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Payback
• Opaque Doors
– N/A (No energy savings; No marginal cost)
• Less than/Equal to Half-Lite Doors
– Average of 22 years
• Greater than Half-Lite Doors
– N/A (Marginal savings)
– Requesting incremental cost from IECC
2009
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Agenda
• Proposed Draft 1 Window Criteria
• Proposed Draft 1 Door Criteria
• Proposed Draft 1 Skylight Criteria
• Comment Period
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V6.0 Draft 1 Criteria
• Overview
• Technological Feasibility & Product
Availability
• Cost-Effectiveness
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Proposed Criteria
Climate Zone U-Factor SHGC
Northern ≤ 0.45 ≤ 0.35
North-Central ≤ 0.47 ≤ 0.30
South-Central ≤ 0.50 ≤ 0.25
Southern ≤ 0.60 ≤ 0.25
Climate Zone U-Factor SHGC
Northern ≤ 0.55 Any
North-Central ≤ 0.55 ≤ 0.40
South-Central ≤ 0.57 ≤ 0.30
Southern ≤ 0.70 ≤ 0. 30
Current Criteria
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Technological Feasibility
(CPD Skylights)
0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 0.75 0.80 0.85 0.90 0.95 1.00
Operable
Fixed
Domed
AL Clad-Wood
Other
Vinyl
Aluminum
Clear
Low-E
Triple
Double
Single
All Products
U-Factor
Gla
zin
gG
lass
Typ
e
Fram
e M
ate
rial
Op
era
tor T
ype
= Average
= Median
4,662
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Technological Feasibility
(CPD TDDs)
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Product Availability
Analysis
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CPD versus PA Analysis
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
≤0.44 ≤0.45 ≤0.46 ≤0.47 ≤0.50 ≤0.60
% o
f To
tal P
rod
uct
s
U-Factor
CPD
Products Available for Sale
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Technological Feasibility
Analysis (CPD)
0
100
200
300
400
500
600
700
800N
um
be
r o
f P
rod
uct
s
U-Factor
≥ 0.60
0.51-0.59
0.46-0.50
0.41-0.45
0.36-0.40
0.31-0.35
0.26-0.30
0.21-0.25
≤ 0.20
SHGC
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Product Availability
Analysis
0
10
20
30
40
50
60
70
80
90N
um
be
r o
f P
rod
uct
s
U-Factor
0.51-0.59
0.46-0.50
0.41-0.45
0.36-0.40
0.31-0.35
0.26-0.30
0.21-0.25
≤0.2
SHGC
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V6.0 Draft 1 Criteria
• Overview
• Technological Feasibility & Product
Availability
• Cost-Effectiveness
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Cost-Effectiveness
• Incremental Product Costs
– Not enough skylight data received to publish
– Too few TDDs to calculate
• Household Energy Savings
– Zero to $4 per year
• Average Payback of 29 years
Zone U-Factor SHGC V5.0 to V6.0
Northern ≤ 0.45 ≤ 0.35 $0-20
North-Central ≤ 0.47 ≤ 0.30 $0-20
South-Central ≤ 0.50 ≤ 0.25 $20-$40
Southern ≤ 0.60 ≤ 0.25 $20-$40
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Agenda
• Proposed Draft 1 Window Criteria
• Proposed Draft 1 Door Criteria
• Proposed Draft 1 Skylight Criteria
• Comment Period
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Comment Period
• Send to [email protected]
• Mark as “Confidential” any files not to
be posted
• All other comments will be posted to
http://www.energystar.gov/index.cfm?c
=revisions.residential_windows_spec
• Comments due Friday, Sept. 28
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