More Related Content Similar to Advanced Residential T24 - Compliance Class (20) More from Center for Sustainable Energy (20) Advanced Residential T24 - Compliance Class1. 5/20/2010
Title-24 Building Energy Standards
Energy Code Works, Inc.
Mark Madison
CEPE, CEA, AEE, HERS Rater,
GreenPoint Rater, ResNet Rater, Member CABEC, CHEERS
Housekeeping
AIA CES credits:
1 3 HSW (Health Safety & Welfare)
3 SD (Sustainable Design)
2 ©2010 Energy Code Works, Inc.
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2. 5/20/2010
Beyond Title-24
Advanced Title-24 scope:
Why go beyond Title-24?
How do you get beyond Title-24?
3 ©2010 Energy Code Works, Inc.
Beyond Title-24
Why Beyond Title-24?
Incentives and requirements (carrots & sticks)
Carrots:
Utility incentive programs
PV incentives (NSHP)
Energy-Star
LEED
Sticks
Cities requiring better than Title-24 compliance
Energy efficient mortgages
Self-motivated designers/builders
Title-24 energy code = just barely legal
4 ©2010 Energy Code Works, Inc.
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3. 5/20/2010
Beyond Title-24
Why Beyond Title-24?
Incentives and requirements (carrots & sticks)
Carrots:
Utility incentive programs
PV incentives (NSHP)
Energy-Star
LEED
5 ©2010 Energy Code Works, Inc.
Beyond Title-24
Why Beyond Title-24?
Incentives and requirements (carrots & sticks)
Carrots:
Utility incentive programs
PV incentives (NSHP)
Energy-Star
LEED
6 ©2010 Energy Code Works, Inc.
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4. 5/20/2010
Beyond Title-24
Why Beyond Title-24?
Incentives and requirements (carrots & sticks)
Carrots:
Utility incentive programs
PV incentives (NSHP)
Energy-Star
LEED
7 ©2010 Energy Code Works, Inc.
Beyond Title-24
Why Beyond Title-24?
8 ©2010 Energy Code Works, Inc.
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5. 5/20/2010
Beyond Title-24
Why Beyond Title-24?
Incentives and requirements (carrots & sticks)
Carrots:
Utility incentive programs
PV incentives (NSHP)
Energy-Star
LEED
9 ©2010 Energy Code Works, Inc.
Beyond Title-24
Why Beyond Title-24?
Incentives and requirements (carrots & sticks)
Sticks
Cities requiring better than Title-24 compliance
Energy efficient mortgages
10 ©2010 Energy Code Works, Inc.
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6. 5/20/2010
Beyond Title-24
Why Beyond Title-24?
Incentives and requirements (carrots & sticks)
Sticks
Cities requiring better than Title-24 compliance
Energy efficient mortgages
11 ©2010 Energy Code Works, Inc.
Beyond Title-24
How do you get beyond Title-24?
Challenges:
New 2008 Title-24 Building Energy Standards 15-22% more
restrictive, tougher than current 2005 energy code.
Many energy credits in 2005 standards are now baseline for 2008
energy code
New 2008 energy code introduces additional layers of compliance
criteria, forms, paperwork
12 ©2010 Energy Code Works, Inc.
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7. 5/20/2010
Beyond Title-24
How do you get beyond Title-24?
Opportunities:
35% better than 2005 Title-24 has been achievable.
2008 Title-24 energy code contains new credits
Building industry has reacted to carrots and sticks
Insulation products
Radiant Barriers
Cool Roofs
HVAC efficiencies
Window/doors products
NFRC testing
Tank less water heaters
13 ©2010 Energy Code Works, Inc.
Scope of this Class
1 Changes to Envelope Requirements
2 Changes to HVAC Requirements
3 New Residential Lighting Requirements
4 Impact of Time Dependant Valuation (TDV)
14 ©2010 Energy Code Works, Inc.
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Scope of this Class
5 Beyond Title-24: Envelope
6 Beyond Title-24: HVAC
7 Beyond Title-24: HERS Measures
8 SDG&E’s Incentive Programs
15 ©2010 Energy Code Works, Inc.
2008 Building Energy Standards
Effective date: January 1, 2010
Projects permitted prior to January 1, 2010 will continue to use
2005 energy code
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2008 Building Energy Standards
Effective date: January 1, 2010
17 ©2010 Energy Code Works, Inc.
2008 Building Energy Standards
Future of Title-24
18 ©2010 Energy Code Works, Inc.
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10. 5/20/2010
2008 Building Energy Standards
Future of Title-24
19 ©2010 Energy Code Works, Inc.
2008 Building Energy Standards
Future of Title-24
20 ©2010 Energy Code Works, Inc.
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11. 5/20/2010
2008 Building Energy Standards
Future of Title-24
21 ©2010 Energy Code Works, Inc.
Scope of this Class
1 Changes to Envelope Requirements
2 Changes to HVAC Requirements
3 New Residential Lighting Requirements
4 Impact of Time Dependant Valuation (TDV)
22 ©2010 Energy Code Works, Inc.
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12. 5/20/2010
Compliance Paths
Two compliance paths available
Prescriptive Performance
23 ©2010 Energy Code Works, Inc.
Compliance Paths
Two compliance paths available
Mandatory
Measures
Prescriptive Performance
Prescriptive Performance
Path Path
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Compliance Paths
Advantages/Disadvantages
Mandatory
Measures
Prescriptive Performance
Prescriptive Performance
Path Path
25 ©2010 Energy Code Works, Inc.
Building Envelope
Walls, floors, ceiling assemblies
Windows, glass doors, skylights
When required, testing and
certification, & labeling
requirements, where required.
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Building Envelope
Current 2005 Prescriptive
Requirements
27 ©2010 Energy Code Works, Inc.
Building Envelope
New 2008 Prescriptive
Requirements
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Building Envelope
New 2008 Prescriptive
Requirements
Bottom Line:
Prescriptive insulation levels remain essentially
unchanged from 2005 standards
Big change…..Fenestration requirements
29 ©2010 Energy Code Works, Inc.
Building Envelope
Current 2005 Prescriptive
Requirements
30 ©2010 Energy Code Works, Inc.
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16. 5/20/2010
Building Envelope
New 2008 Prescriptive
Requirements
31 ©2010 Energy Code Works, Inc.
Building Envelope
Windows, glass doors, skylights
Two allowable methods for determining window & door
performance:
NFRC procedures/labels or…
Use default tables (116-a & 116-b)
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Building Envelope
Windows, glass doors, skylights
33 ©2010 Energy Code Works, Inc.
Building Envelope
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Building Envelope
35 ©2010 Energy Code Works, Inc.
Building Envelope
Windows, glass doors, skylights
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Building Envelope
Windows, glass doors, skylights
Default tables 116-a & 116-b
37 ©2010 Energy Code Works, Inc.
Building Envelope
Windows, glass doors, skylights
2008 Package D
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Building Envelope
Windows, glass doors, skylights
Package D vs. Default tables (U-factor)
39 ©2010 Energy Code Works, Inc.
Building Envelope
Windows, glass doors, skylights
Package D vs. Default tables (SHGC)
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Building Envelope
Windows, glass doors, skylights
Package D vs. NFRC labels
41 ©2010 Energy Code Works, Inc.
Building Envelope
Windows, glass doors, skylights
Bottom Line:
Prescriptive U-factor requirements
almost 30% more stringent than
2005 code
2008 Standards will force you to
use NFRC Labels
Significant penalty for using default
tables
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Building Envelope
When required, where required,
testing, certification & labeling
In 2008 code required
prescriptively in all climate zones
New, addition & alterations
43 ©2010 Energy Code Works, Inc.
Building Envelope
When required, where required,
testing, certification & labeling
Energy Star Cool Roof does not
qualify in California
Must be certified & labeled by the
Cool Roof Rating Council
44 ©2010 Energy Code Works, Inc.
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Building Envelope
When required, where required,
testing, certification & labeling
Exemptions to cool roof requirement:
Roof areas covered by building integrated photovoltaic panels and
solar hot water panels and roofs with existing roof ballasts w/weight
of 25 lb/ft2 are exempted from cool roof requirement.
45 ©2010 Energy Code Works, Inc.
Scope of this Class
1 Changes to Envelope Requirements
2 Changes to HVAC Requirements
3 New Residential Lighting Requirements
4 Impact of Time Dependant Valuation (TDV)
46 ©2010 Energy Code Works, Inc.
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24. 5/20/2010
HVAC
Minimum AFUE, SEER, EER
SEER vs EER
Prescriptive requirement
No prescriptive alternatives
HVAC change-outs
Refrigerant Charge Measurement
Cooling Coil Airflow
Fat Watt Draw
47 ©2010 Energy Code Works, Inc.
HVAC
Appliance Efficiency Regulations
set HVAC efficiency minimums in
Prescriptive Packages
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HVAC
Prescriptive Packages refer to
Appliance Efficiency Regulations
minimums
49 ©2010 Energy Code Works, Inc.
HVAC
Minimum AFUE, SEER, EER
SEER vs EER
50 ©2010 Energy Code Works, Inc.
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HVAC
Minimum AFUE, SEER, EER
SEER vs EER
Questions:
What is the difference between
EER and SEER?
Why does it matter?
51 ©2010 Energy Code Works, Inc.
HVAC
Minimum AFUE, SEER, EER
SEER vs EER
EER is measured at 80 degrees
indoor air running continuously
SEER is measured by using the
EER and factoring in the same unit
running under a lighter load (80
degrees indoor, 82 degrees
outdoor and cycling on and off
52 ©2010 Energy Code Works, Inc.
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27. 5/20/2010
HVAC
Minimum AFUE, SEER, EER
SEER vs EER
Why this matters:
Possible for two units with the same
SEER to have different EERs
For two units with a given SEER the
one with the higher EER will be more
efficient
EER’s higher than 10 require HERS
verification
Take time to verify SEER and EER
53 ©2010 Energy Code Works, Inc.
HVAC
Minimum AFUE, SEER, EER
SEER vs EER
Why this matters:
EER higher than 10 will trigger a
HERS credit in the Title-24 compliance
calculations
Will also appear on the CF-1R as a
HERS measure required verification
and a CF-4R
54 ©2010 Energy Code Works, Inc.
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HVAC
Minimum AFUE, SEER, EER
SEER vs EER
Bottom Line:
Minimum efficiency levels remain
essentially unchanged from 2005
standards. EER more important
Big change…..Duct testing,
Refrigerant Charge Measurement,
Cooling coil airflow & Fan Watt Draw
55 ©2010 Energy Code Works, Inc.
HVAC
Prescriptive requirement
No prescriptive alternatives
HVAC change-outs
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HVAC
Prescriptive requirement
No prescriptive alternatives
HVAC change-outs
TXV verification or higher EER
alternatives no longer options to
avoid duct sealing & testing
Performance approach is an
option to tradeoff against duct
sealing & testing
57 ©2010 Energy Code Works, Inc.
HVAC
Prescriptive requirement
No prescriptive alternatives
HVAC change-outs
HVAC change-outs
Ducts must be sealed and tested
under any of the following
circumstances:
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HVAC
Prescriptive requirement
No prescriptive alternatives
HVAC change-outs
HVAC change-outs
1. Air handler installed or replaced
2. Outdoor condensing unit installed or replaced
3. Cooling or heating coil installed or replaced
4. Furnace heat exchanger installed or replaced
5. When existing duct systems are altered in
climate zones 2, 9, 10, 11, 12-16
59 ©2010 Energy Code Works, Inc.
HVAC
Refrigerant Charge Measurement
Cooling Coil Airflow
Fan Watt Draw
Prescriptive Package Requirements
Refrigerant charge Measurement
Climate zones 2 and 8-15 (split systems only)
Cooling Coil Airflow (greater than 350 cfm per ton)
Climate zones 10-15
Fan Watt Draw (less than 0.58 watt per cfm)
Climate zones 10-15
60 ©2010 Energy Code Works, Inc.
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HVAC
Refrigerant Charge Measurement
Cooling Coil Airflow
Fan Watt Draw
61 ©2010 Energy Code Works, Inc.
HVAC
Refrigerant Charge Measurement
Cooling Coil Airflow
Fan Watt Draw
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HVAC
Refrigerant Charge Measurement
Cooling Coil Airflow
Fan Watt Draw
Two permanently installed
temperature sensors, one
mounted on evap coil and one
mounted on condenser coil.
Must be type K with plug leading
to outside of equipment accessible
to HERS raters without any
disassembly
63 ©2010 Energy Code Works, Inc.
HVAC
Refrigerant Charge Measurement
Cooling Coil Airflow
Fan Watt Draw
Two permanently installed
temperature sensors, one
mounted on evap coil and one
mounted on condenser coil.
Must be type K with plug leading
to outside of equipment accessible
to HERS raters without any
disassembly
64 ©2010 Energy Code Works, Inc.
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HVAC
Refrigerant Charge Measurement
Cooling Coil Airflow
Fan Watt Draw
Bottom line
These HERS measures are baseline in Package D so they will be widespread
Because they are required in Package D they are not available as a credit to help
you go beyond Title-24
HVAC contractors will need to become familiar with testing procedure for all three
HERS measures.
CF-6R HVAC forms will need to be filled out prior to HERS verification tests
Will need system in place for providing sensors, temperature and pressure access
holes w/labels for HERS raters
65 ©2010 Energy Code Works, Inc.
Scope of this Class
1 Changes to Envelope Requirements
2 Changes to HVAC Requirements
3 New Residential Lighting Requirements
4 Impact of Time Dependant Valuation (TDV)
66 ©2010 Energy Code Works, Inc.
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TDV
4 Impact of Time Dependant Valuation (TDV)
New for 2008 Residential Standards
Previous versions of Title-24 did not account for time-of-use patterns
TDV accounts for variations in cost related to time of day, seasons, geography, fuel type
2008 Standards now places a higher value on energy savings during high cost times
Encourages designs that will reduce peak loads thru-out California.
67 ©2010 Energy Code Works, Inc.
TDV
4 Impact of Time Dependant Valuation (TDV)
Example:
Single family residence
1800 sq. ft.
Package D parameters
68 ©2010 Energy Code Works, Inc.
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TDV
4 Impact of Time Dependant Valuation (TDV)
Example:
SFR residence
1800 sq. ft.
Package D
69 ©2010 Energy Code Works, Inc.
TDV
4 Impact of Time Dependant Valuation (TDV)
Example:
SFR residence
1800 sq. ft.
Package D
1ST Perf Run
Front facing N
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TDV
4 Impact of Time Dependant Valuation (TDV)
Example:
SFR residence
1800 sq. ft.
Package D
2nd Perf Run
Multiple
Orientations
71 ©2010 Energy Code Works, Inc.
TDV
4 Impact of Time Dependant Valuation (TDV)
Strategies for TDV
Orientation is important is building design
Take advantage of all overhangs and side fins in building design
Model each window and door separately in compliance run
Utilize exterior shading devices
No credit for interior shading devices
break
72 ©2010 Energy Code Works, Inc.
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TDV
4 Impact of Time Dependant Valuation (TDV)
Bottom Line for TDV 2008
Building designs that generate high heating/cooling loads during peak
energy cost periods will be severely penalized
Electric multipliers for 2008 up to 50 verses 20 in 2005 standards
Gas multipliers for 2008 up to 1.5 vs. 1.0 in 2005 standards
Upside: Energy saving features, strategies that reduce peak loads
are rewarded greatly, can help you go “better than” Title-24
break
73 ©2010 Energy Code Works, Inc.
Title-24 Building Energy Standards
Energy Code Works, Inc.
Break
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Scope of this Class
5 Beyond Title-24: Envelope
6 Beyond Title-24: HVAC
7 Beyond Title-24: HERS Measures
8 SDG&E’s Incentive Programs
75 ©2010 Energy Code Works, Inc.
Compliance Paths
Two compliance paths available
Prescriptive Performance
76 ©2010 Energy Code Works, Inc.
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Building Envelope
New 2008 Prescriptive
Requirements
77 ©2010 Energy Code Works, Inc.
Building Envelope
2008 Upgrade Options
Opaque Options for credit:
Superbatt insulation
Overhangs/Sidefins
House wrap
78 ©2010 Energy Code Works, Inc.
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Building Envelope
2008 Upgrade Options
Superbatt insulation
R-15: 3 ½” thickness 2x4 framing
R-21: 5 ½” thickness 2x6 framing
79 ©2010 Energy Code Works, Inc.
Building Envelope
2008 Upgrade Options
Overhangs
Ignored in prescriptive approach
Large credit using performance
Requires modeling each window/glazed door separately
80 ©2010 Energy Code Works, Inc.
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Building Envelope
2008 Upgrade Options
81 ©2010 Energy Code Works, Inc.
Building Envelope
2008 Upgrade Options
House Wrap:
Reduces building envelope air leakage
Must be applied continuously
All tears/breaks repaired
Horizontal seams lapped
Vertical seams lapped
Windows/penetrations taped or caulked
Taped or sealed at slab junction
82 ©2010 Energy Code Works, Inc.
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Building Envelope
2008 Upgrade Options
83 ©2010 Energy Code Works, Inc.
Building Envelope
2008 Upgrade Options
Default tables 116-a & 116-b
84 ©2010 Energy Code Works, Inc.
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Building Envelope
2008 Upgrade Options
Package D vs. NFRC labels
85 ©2010 Energy Code Works, Inc.
Building Envelope
2008 Upgrade Options
86 ©2010 Energy Code Works, Inc.
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Building Envelope
2008 Upgrade Options
Glazing Strategies for Beyond Title-24:
Do not use default tables if possible
Relatively easy to hit 0.40 UF/SHGC target
Energy Star target of 0.30 UF/SHGC is
driving window manufactures product more
than California’s Title-24’s 0.40/0.40
87 ©2010 Energy Code Works, Inc.
Building Envelope
5 Beyond Title-24: Envelope Results
Package D
Results:
6
88 ©2010 Energy Code Works, Inc.
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Building Envelope
5 Beyond Title-24: Envelope Results
Envelope Improvements
Results:
6
Superbatt: R-15 wall insulation R-38 ceiling insulation
House wrap
Modeled overhangs and sidefins
Milgard Low-E windows: 0.30 U-factor 0.30 SHGC (Energystar)
89 ©2010 Energy Code Works, Inc.
Building Envelope
5 Beyond Title-24: Envelope Results
Envelope
Improvements
Results:
Superbatt 6
Housewrap
Overhangs
Milgard Low-E
Windows
90 ©2010 Energy Code Works, Inc.
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46. 5/20/2010
Scope of this Class
5 Beyond Title-24: Envelope
6 Beyond Title-24: HVAC
7 Beyond Title-24: HERS Measures
8 SDG&E’s Incentive Programs
91 ©2010 Energy Code Works, Inc.
HVAC Upgrades Beyond Title-24
Minimum AFUE, SEER, EER
SEER vs EER
Prescriptive requirement
No prescriptive alternatives
HVAC change-outs
Refrigerant Charge Measurement
Cooling Coil Airflow
Fat Watt Draw
92 ©2010 Energy Code Works, Inc.
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47. 5/20/2010
HVAC Beyond Title-24
Prescriptive Packages refer to
Appliance Efficiency Regulations
minimums
93 ©2010 Energy Code Works, Inc.
HVAC Beyond Title-24
Appliance Efficiency Regulations
set HVAC efficiency minimums in
Prescriptive Packages
94 ©2010 Energy Code Works, Inc.
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HVAC Beyond Title-24
HVAC Strategies
HVAC Strategies for Beyond Title-24:
Higher AFUE (90%+)
Higher SEER and higher EER
HVAC zoning
Ducts within conditioned space
95 ©2010 Energy Code Works, Inc.
HVAC Beyond Title-24
HVAC Strategies
HVAC Zoning
Living & Sleeping Zones
96 ©2010 Energy Code Works, Inc.
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HVAC
HVAC Strategies
Duct Location
Within Conditioned Space
Buried ducts
Both require extensive
documentation
97 ©2010 Energy Code Works, Inc.
HVAC Beyond Title-24
Prescriptive requirement
No prescriptive alternatives
No credit potential
98 ©2010 Energy Code Works, Inc.
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HVAC Beyond Title-24
Refrigerant Charge Measurement
Cooling Coil Airflow
Fan Watt Draw
Prescriptive Package D Requirements
Refrigerant charge Measurement
Climate zones 2 and 8-15 (split systems only)
Cooling Coil Airflow (greater than 350 cfm per ton)
Climate zones 10-15
Fan Watt Draw (less than 0.58 watt per cfm)
Climate zones 10-15
99 ©2010 Energy Code Works, Inc.
HVAC Beyond Title-24
6 Beyond Title-24: HVAC
5
HVAC Improvements Results:
90% AFUE
14 SEER 11.00 EER
HVAC Zoning
100 ©2010 Energy Code Works, Inc.
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HVAC Beyond Title-24
6 Beyond Title-24: HVAC
5
HVAC Improvements
Results:
101 ©2010 Energy Code Works, Inc.
Building Envelope
5 Beyond Title-24: Envelope Results
Envelope Improvements
Results:
6
Superbatt: R-15 wall insulation R-38 ceiling insulation
Overhangs, sidefins
Housewrap
Milgard Low-E windows: 0.30 U-factor 0.30 SHGC (Energystar)
102 ©2010 Energy Code Works, Inc.
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HVAC Beyond Title-24
6 Beyond Title-24: HVAC
5
HVAC Improvements Results:
90% AFUE
14 SEER 11.00 EER
HVAC Zoning
Total: 25% better than Title-24
103 ©2010 Energy Code Works, Inc.
Scope of this Class
5 Beyond Title-24: Envelope
6 Beyond Title-24: HVAC
7 Beyond Title-24: HERS Measures
8 SDG&E’s Incentive Programs
104 ©2010 Energy Code Works, Inc.
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HERS Measures
Duct Sealing •Sealed and HERS verified less than 6% supply fan flow
•Change-outs: 15% or less of fan flow Package D, no credit
Supply
Duct • Conditioned space, buried ducts Credit, lots of documentation
Location
Supply Duct
• Reduced surface area Credit, lots of documentation
Credits
• NEW CEC certified AHU w/less than 2% leakage.
Low Leakage Duct sealing & testing also required.
AHU
•CHANGED Refrigerant charge verified using one of three methods
Refrigerant
Invasive, non-invasive & CID. No TXV to trade against Package D,
Charge
No credit
105 ©2010 Energy Code Works, Inc.
HERS Measures
Supply Duct
Credits
Low Leakage
AHU
Refrigerant
Charge
106 ©2010 Energy Code Works, Inc.
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HERS Measures
Supply Duct
Credits
Low Leakage
AHU
Refrigerant
Charge
107 ©2010 Energy Code Works, Inc.
HERS Measures
Proper Refrigerant Charge Verification:
Will be very common because of change-out
rules
Very cost-effective
Supply Duct
Overcharged or undercharged system can
Credits
reduce a 14 SEER unit to below 9 SEER
Must be performed by an independent
Low Leakage
HERS rater AHU
108 ©2010 Energy Code Works, Inc.
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HERS Measures
CID • NEW Charge Indicator Device Credit, not yet available
• NEW Requires air handling units maintain supply airflow greater
CCA than 350 cfm per nominal ton of cooling capacity across the coil
Package D, no credit
Fan Watt
• NEW Requires fan watt draw less than 0.58 watts per cfm
Draw
•Package D, no credit
• HVAC condenser & coil correctly matched to achieve
High EER high EER (above 10) Credit
•Credit for A/C equipment having cooling capacity that meets
Cooling
calculated maximum cooling load. Credit, load calcs req.
Capacity
109 ©2010 Energy Code Works, Inc.
HERS Measures
Evap Cooled • NEW Improves EER, water use limits & duct sealing, air flow, and
Condensers refrigerant charge verification required. Credit
Ice
Storage • NEW Shifts peak energy use to off-peak hours (Ice Bear)
A/C Additional HERS measures required Credit
Envelope
• Sealing, caulking, gaskets. Verified by HERS blower door test.
Sealing
•Credit
• Framing stage field verification then insulation stage verification.
QII • New QII verification for Spray Polyurethane Foam
•Credit
• Not a Title-24 credit, New Solar Home Program requirement
Photovoltaic
• HERS PV verifications required.
110 ©2010 Energy Code Works, Inc.
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HERS Measures
HERS Measures most
commonly specified for 2008:
Duct Sealing
Refrigerant
Charge
Cooling Coil
Airflow
Fan Watt
Draw
Photovoltaic
QII
111 ©2010 Energy Code Works, Inc.
Scope of this Class
7 Beyond Title-24: HERS Measures
HERS credits assumed in run:
Duct sealing & testing (Package D)
Verified fan flow (package D)
Refrigerant charge verification (Package D)
EER verification (credit)
HVAC zoning: (credit)
QII (credit)
112 ©2010 Energy Code Works, Inc.
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Scope of this Class
7 Beyond Title-24: HERS Measures
HERS credits
results:
113 ©2010 Energy Code Works, Inc.
Scope of this Class
7 Beyond Title-24: HERS Measures
HERS credits left remaining:
Blower door test
Ice storage system
Ducts in conditioned space
Measured duct surface area
Water cooled condenser
These credits can be used for plans with
more glass area than baseline (20% CFA)
Also:
Radiant heating
Tankless water heater
114 ©2010 Energy Code Works, Inc.
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Building Envelope
5 Beyond Title-24: Envelope Results
Envelope
Improvements
Results:
Superbatt 6
Radiant Barrier
Housewrap
Milgard Low-E
Windows
Adding a tankless
water heater would
have easily pushed
results to
15% better than
for LEED
115 ©2010 Energy Code Works, Inc.
Building Envelope
5 Beyond Title-24: Extreme Compliance
Shipping Container House
Metal sides
Metal framing
6
Over 50% glass/floor ratio
Joshua Tree!
116 ©2010 Energy Code Works, Inc.
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Building Envelope
5 Beyond Title-24: Extreme Compliance
Shipping Container House
Title-24 strategies:
Isolated metal framing
117 ©2010 Energy Code Works, Inc.
Building Envelope
5 Beyond Title-24: Extreme Compliance
Shipping Container House
Title-24 strategies:
Exterior shading
118 ©2010 Energy Code Works, Inc.
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Building Envelope
5 Beyond Title-24: Extreme Compliance
Shipping Container House
Title-24 strategies:
HVAC zoning
Ductless split units
Tankless water heaters
High performance
windows/doors
119 ©2010 Energy Code Works, Inc.
Beyond Title-24
7 Beyond Title-24: HERS Measures
Resistance to HERS measures:
HVAC contractors (duct testing):
Extra expense
“our ducts don’t leak”
Insulation contractors:
Extra expense
Unnecessary, “our installations pass
inspection”
120 ©2010 Energy Code Works, Inc.
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7 Beyond Title-24: HERS Measures
Resistance to HERS measures:
HVAC contractors (duct testing):
“Our ducts don’t leak”
Extra expense
Most new ducts leak over 25%
Common problems:
Poor duct design
Connections not to code
Leaky fan coil units
Ducts not properly supported
121 ©2010 Energy Code Works, Inc.
Beyond Title-24
7 Beyond Title-24: HERS Measures
Resistance to HERS measures:
Duct testing
Air Conditioning Contractors of America
Quality Installation Specification
HVAC industry guide that “establishes
minimum criteria for the proper installation,
maintenance and servicing of HVAC
systems”
122 ©2010 Energy Code Works, Inc.
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7 Beyond Title-24: HERS Measures
Resistance to HERS measures:
Duct testing
Air Conditioning Contractors of America
Quality Installation Specification
Uses identical criteria for allowable duct
leakage as Title-24’s HERS duct sealing &
testing procedures.
123 ©2010 Energy Code Works, Inc.
Beyond Title-24
7 Beyond Title-24: HERS Measures
124 ©2010 Energy Code Works, Inc.
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7 Beyond Title-24: HERS Measures
Resistance to HERS measures:
Insulation contractors:
Extra expense
Unnecessary, “our installations
pass inspection”
Why is it more expensive to do it
right?
What guidelines are insulation
contractors using normally?
125 ©2010 Energy Code Works, Inc.
Beyond Title-24
7 Beyond Title-24: HERS Measures
North American Insulation
Manufacturers of America
Guidelines for installation of
insulation and hiring of insulation
contractors
126 ©2010 Energy Code Works, Inc.
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7 Beyond Title-24: HERS Measures
North American Insulation
Manufacturers of America
Guidelines virtually identical with
HERS QII compliance checklist
If contractors follows this checklist
they likely will pass HERS QII
verification inspection
127 ©2010 Energy Code Works, Inc.
Beyond Title-24
7 Beyond Title-24: HERS Measures
QII in Title-24 compliance run
R-13 wall insulation is derated to R-8 without QII
When QII assumed R-13 is improved to R-9.5
Baseline Title-24 assumes poor quality insulation
QII is credit for good quality installation
128 ©2010 Energy Code Works, Inc.
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Beyond Title-24
7 Beyond Title-24: HERS Measures
QII in real world: The good
129 ©2010 Energy Code Works, Inc.
Beyond Title-24
7 Beyond Title-24: HERS Measures
QII in real world: the bad
130 ©2010 Energy Code Works, Inc.
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Beyond Title-24
7 Beyond Title-24: HERS Measures
QII in real world: the ugly
131 ©2010 Energy Code Works, Inc.
Beyond Title-24
7 Beyond Title-24: HERS Measures
QII in real world
132 ©2010 Energy Code Works, Inc.
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Beyond Title-24
7 Beyond Title-24: HERS Measures
Bottom line
HERS measures represent one of the most cost-
effective energy savings strategies in the energy
code.
Energy savings & quality control
HVAC contractors and Insulation contractors will
Need to become familiar with HERS criteria for
compliance.
HERS requirements are virtually identical to their
own industry installation guidelines
133 ©2010 Energy Code Works, Inc.
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7 Beyond Title-24: HERS Measures
QII Training for Contractors
City of Santa Monica
www.smgov.net/departments/ose/categories/buildGreen.aspx
134 ©2010 Energy Code Works, Inc.
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Compliance Forms
Certificate of Compliance (CF-1R)
Submitted to plancheck and
Prepared by Title-24 consultant or
approved copy provided to General
designer
Contractor
Installation
CF-6R Installation
Certificate
CF-4R Field
Verification/HERS
135 ©2010 Energy Code Works, Inc.
Compliance Forms
Certificate of Compliance (CF-1R)
Submitted to plancheck and
Prepared by Title-24 consultant or
approved copy provided to General
designer
Contractor
Installation
CF-6R Installation
Certificate
CF-4R Field Certificate of Installation (CF-6R)
Verification/HERS
Filled out by contractor and sub- Provided to inspector & HERS Rater
contractors & later to the homeowner
136 ©2010 Energy Code Works, Inc.
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Compliance Forms
Certificate of Compliance (CF-1R)
Submitted to plancheck and
Prepared by Title-24 consultant or
approved copy provided to General
designer
Contractor
Installation
CF-6R Installation
Certificate
CF-4R Field Certificate of Installation (CF-6R)
Verification/HERS
Filled out by contractor and sub- Provided to inspector & HERS Rater
contractors & later to the homeowner
Certificate of Verification and Diagnostic (CF-4R)
Completed by HERS Rater Registered with CHEERS or Calcerts
and copy provided to contractor
137 ©2010 Energy Code Works, Inc.
Energy Code Works, Inc.
Mark Madison
CEPE, CEA, AEE, HERS Rater,
GreenPoint Rater, ResNet Rater, Member CABEC, CHEERS
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