2008 updates & changes presentation
TRANSCRIPT
Energy Code Works, Inc.
Title-24 Building Energy Standards
Mark Madison CEPE, CEA, AEE, HERS Rater, GreenPoint Rater, ResNet Rater, Member CABEC, CHEERS
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Scope of this Class
Changes to Envelope Requirements1
Changes to HVAC Requirements2
New Residential Lighting Requirements3
Impact of Time Dependant Valuation (TDV) 4
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Scope of this Class
New Ventilation Requirements 5
New HERS Credits6
New Forms & Registration Requirements7
Q&A 8
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2008 Building Energy Standards
Effective date: January 1, 2010
Some cities and counties can accept 2008 Title-24 compliance calculations prior to January 1, 2010. Most won’t
Benefits of using 2008 Standards now (tract projects) Current projects that might slip past January1 date should be
analyzed using 2008 Standards to avoid surprises later.
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2008 Building Energy Standards
Effective date: January 1, 2010
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2008 Building Energy Standards
Brief History of Title-24
1976 California Energy Commission created 1977 Warren-Alquist Act “The standards shall be cost effective” “C.E.C. shall periodically update the
standards and adopt revisions when deemed necessary”
Al Alquist
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2008 Building Energy Standards
Brief History of Title-24 1978 Standards 1980 Standards 1982 Standards 1984 Standards 1986 Standards 1987 Standards 1988 Standards 1992 Standards 1995 Standards 1998 Standards 2001 Standards 2005 Standards
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2008 Building Energy Standards
Brief History of Title-24 1st edition of Title-24
Building Energy StandardsJuly 26, 1978, 114 pages
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2008 Building Energy Standards
Brief History of Title-24 1978 Prescriptive Requirements
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2008 Building Energy Standards
Brief History of Title-24 Current 2005 Prescriptive Requirements
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2008 Building Energy Standards
Brief History of Title-24 Result of 30 years of Title-24 Standards:
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2008 Building Energy Standards
Brief History of Title-24 2008 Title-24 Energy Standards Standards : 166 pages Residential Manual: 522 pages Non-Res Manual: 901 pages Appendixes: 352 pages Appliance Efficiency Regs: 238 pages Title-24 ACM Manual: 212 pages HERS Manual: 106 pages HERS Regulations: 24 pages Total: 2521 pages
www.energycode.com Energy Code Works, Inc.
2008 Building Energy Standards
Brief History of Title-24 1978 thru 1998 Title-24 fairly low priority concern in plancheck process 2001 Standards changed all that Tighter code/HERS Measures/City Requirements have made Title-24 a
priority best addressed early in design stage Utility Incentive Programs also use Title-24 as yardstick to qualify
submittals into their programs. 2008 bottom line:
Title-24 needs to be incorporated early into the building design process Title-24 is not over when permit is issued All in design team need to be well versed in Title-24 requirements,
HERS measures, forms and inspections, coordination is critical.
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2008 Building Energy Standards
Brief History of Title-24 Compliance forms have grown exponentially
1978, 2 pages 2008 CF-1R, MF-1R, CF-6R total 68 pages! Minimum of 8 and up to 24 pages on the drawings
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2008 Building Energy Standards
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2008 Building Energy Standards
Future of Title-24
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2008 Building Energy Standards
Future of Title-24
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2008 Building Energy Standards
Future of Title-24
www.energycode.com Energy Code Works, Inc.
2008 Building Energy Standards
Future of Title-24
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Scope of this Class
Changes to Envelope Requirements1
Changes to HVAC Requirements2
New Residential Lighting Requirements3
Impact of Time Dependant Valuation (TDV) 4
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Compliance Paths
Two compliance paths available
Prescriptive Performance
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Compliance Paths
Two compliance paths available
Prescriptive Performance
Mandatory Measures
Performance Path
Prescriptive Path
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Compliance Paths
Advantages/Disadvantages
Prescriptive Performance
Prescriptive Path
Performance Path
AdvantagesSimpleEasier to useEasier to plancheckDisadvantagesLack of flexibilityIgnores many energy saving strategiesNo trade-offsCannot use for incentive programs thatrequire performance based reports
AdvantagesFlexibilityTrade-offs galoreCan model wide variety of energy saving features and strategiesOutput available for plancheck and other incentive programsDisadvantagesSoftware expenseNot easy to use or learnLarger report/formsMore difficult to plancheck
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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
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Building Envelope
New 2008 Prescriptive Requirements
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Building Envelope
New 2008 Prescriptive Requirements
Must use envelope assemblies from tables in Residential Appendix to quantify R-value/U-factor for assemblies
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Building Envelope
New 2008 Prescriptive Requirements
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Building Envelope
New 2008 Prescriptive Requirements
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Building Envelope
New 2008 Prescriptive Requirements
Change from wood framing to metal framing can significantly affect compliance.Wood and metal framing not interchangeableMetal framed construction generally will require a exterior rigid insulating board
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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
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Building Envelope
Current 2005 Prescriptive Requirements
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Building Envelope
New 2008 Prescriptive Requirements
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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
NFRC tested w/labels
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Building Envelope
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Building Envelope
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Building Envelope
Windows, glass doors, skylights
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Building Envelope
Default tables approach
Default tables 116-a & 116-b
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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)
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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
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Building Envelope
Windows, glass doors, skylights
0.40 U-factor/0.40 SGHC vs. available products
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Building Envelope
Windows, glass doors, skylights
0.40 U-factor/0.40 SGHC vs. available products
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Building Envelope
Windows, glass doors, skylights
0.40 U-factor/0.40 SGHC vs. available products
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Building Envelope
Windows, glass doors, skylights
0.40 U-factor/0.40 SGHC vs. available products
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Building Envelope
Windows, glass doors, skylights
0.40 U-factor/0.40 SGHC vs. Energy Star requirements
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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
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
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Building Envelope
When required, where required, testing, certification & labeling
In 2008 code required prescriptively in all climate zonesNew, addition & alterations
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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
Roof tear-offs will trigger cool roof requirement, however….
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Building Envelope
When required, where required, testing, certification & labeling
Tradeoffs to avoid cool roof requirement:
1. Buildings with no ducts in attic or,2. Radiant barrier in the attic or,3. R-30 attic insulation; or,4. If in Climate zones 10, 11, 13, and 14 R-3 or greater roof
deck insulation or,5. Existing ducts insulation, sealed and HERS duct tested or,6. Use performance approach and utilize trade-offs and…
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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.
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Scope of this Class
Changes to Envelope Requirements1
Changes to HVAC Requirements2
New Residential Lighting Requirements3
Impact of Time Dependant Valuation (TDV) 4
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HVAC
Minimum AFUE, SEER, EER
SEER vs EER
Prescriptive requirementNo prescriptive alternativesHVAC change-outs
Refrigerant Charge MeasurementCooling Coil AirflowFat Watt Draw
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HVAC
Appliance Efficiency Regulations set HVAC efficiency minimums in Prescriptive Packages
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HVAC
Prescriptive Packages refer to Appliance Efficiency Regulations minimums
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HVAC
Minimum AFUE, SEER, EER
SEER vs EER
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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?
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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
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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
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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
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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
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HVAC
Prescriptive requirementNo prescriptive alternativesHVAC change-outs
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HVAC
Prescriptive requirementNo prescriptive alternativesHVAC 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
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HVAC
Prescriptive requirementNo prescriptive alternativesHVAC change-outs
HVAC change-outs
Ducts must be sealed and tested under any of the following circumstances:
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HVAC
Prescriptive requirementNo prescriptive alternativesHVAC change-outs
HVAC change-outs
1. Air handler installed or replaced2. Outdoor condensing unit installed or replaced3. Cooling or heating coil installed or replaced4. Furnace heat exchanger installed or replaced5. When existing duct systems are altered in
climate zones 2, 9, 10, 11, 12-16
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HVAC
Heating
Cooling
HVAC Equipment Sizing
Heating
The Standards do not set limits on the sizing of heating equipment, but they do require that heating loads be calculated for new heating systems Acceptable load calculation procedures include methods described in the ASHRAE Handbook –Equipment, ASHRAE Handbook – Applications, ASHRAE Handbook –Fundamentals, SMACNA Residential Comfort System Installation Manual, or ACCA Manual J.”
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HVAC
Heating
Cooling
HVAC Equipment Sizing
Cooling
“Just as for heating equipment, the Standards do not set limits on the size ofcooling equipment, but they do require that cooling loads be calculated for newcooling systems. Avoiding over sizing is especially important for coolingequipment because efficiency degrades when the system cycles on and offfrequently.
The Standards offer a compliance credit when the installed air conditioningequipment is sized in accordance with the Reference Residential Appendix RA1Maximum Rated Cooling Capacity for compliance credit sizing calculations. AHERS rater field verification is required to confirm that the installed equipmentconforms to the sizing criteria as reported on the CF-1R.”
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HVAC
Refrigerant Charge MeasurementCooling Coil AirflowFan Watt Draw
Prescriptive Package Requirements
Refrigerant charge MeasurementClimate 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
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HVAC
Refrigerant Charge MeasurementCooling Coil AirflowFan Watt Draw
Prescriptive Package Requirements
Refrigerant charge MeasurementClimate 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
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HVAC
Refrigerant Charge MeasurementCooling Coil AirflowFan Watt Draw
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HVAC
Refrigerant Charge MeasurementCooling Coil AirflowFan Watt Draw
Three acceptable methods for proper refrigerant charge:
1. Super-heat2. Sub-cooling3. Weighing of refrigerant
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HVAC
Refrigerant Charge MeasurementCooling Coil AirflowFan Watt Draw
Three acceptable methods for proper refrigerant charge:
1. Super-heat Uses temperature differences in evaporator section to determine proper charge
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HVAC
Refrigerant Charge MeasurementCooling Coil AirflowFan Watt Draw
Three acceptable methods for proper refrigerant charge:
2. Sub-cooling Similar to superheat but happens in condensing portion of system.
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HVAC
Refrigerant Charge MeasurementCooling Coil AirflowFan Watt Draw
Three acceptable methods for proper refrigerant charge:
3. Weighing of refrigerant Using manufacturers recommendation on unit (6lbs 5oz etc)
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HVAC
Refrigerant Charge MeasurementCooling Coil AirflowFan Watt Draw
Un-acceptable methods for proper refrigerant charge:
4. Instinct, pressures, experience, beer can cold method
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HVAC
Refrigerant Charge MeasurementCooling Coil AirflowFan Watt Draw
All three methods acceptable but must be verified by HERS rater
1. Invasive method (Gauges)2. Non-invasive method (superheat/subcool)
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HVAC
Refrigerant Charge MeasurementCooling Coil AirflowFan Watt Draw
Temperature Measurement Access Holes (TMAH)
Package C & D require HERS verification of proper refrigerant charge
HVAC installer must provide TMAH
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HVAC
Refrigerant Charge MeasurementCooling Coil AirflowFan Watt Draw
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HVAC
Refrigerant Charge MeasurementCooling Coil AirflowFan 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
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HVAC
Refrigerant Charge MeasurementCooling Coil AirflowFan 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
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HVAC
Refrigerant Charge MeasurementCooling Coil AirflowFan Watt Draw
HVAC contractor must provide pressure and temperature access holes of specific size in specific locations and label these holes.
This mandatory for HERS rater to later verify RCM, CCA and Fan Watt Draw
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HVAC
Refrigerant Charge MeasurementCooling Coil AirflowFan Watt Draw
Cooling Coil Air Flow and Fan Watt Draw hole for Static Pressure Probe
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HVAC
Refrigerant Charge MeasurementCooling Coil AirflowFan Watt Draw
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HVAC
Refrigerant Charge MeasurementCooling Coil AirflowFan Watt Draw
2008 Appendix RA-3 page 3-11
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HVAC
Refrigerant Charge MeasurementCooling Coil AirflowFan Watt Draw
HVAC Change-outs
Climate zones 2 and 8-15 new or replacement split a/c units or heat pumps RCM required with HERS verification
Applies also when components of existing HVAC system such as outdoor condensing unit or indoor coil are replaced
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HVAC
Refrigerant Charge MeasurementCooling Coil AirflowFan Watt Draw
HVAC Change-outs
Climate zones 10-15 when new or replacement space conditioning system is installed CCA and FWD required with HERS verification
This is a prescriptive requirement, can be traded-off using performance approach
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HVAC
Refrigerant Charge MeasurementCooling Coil AirflowFan Watt Draw
Bottom line
Will require good coordination with HERS rater for all three HERS HVAC measures. Choice: Invasive (gauges) or non-invasive.
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
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Scope of this Class
Changes to Envelope Requirements1
Changes to HVAC Requirements2
New Residential Lighting Requirements3
Impact of Time Dependant Valuation (TDV) 4
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Residential Lighting
50% RuleHigh EfficacyNew allowances
#1 Bathrooms, Garages, Laundry rooms, closets & utility rooms
#2 Other Rooms
Minimum efficacy
Required controls
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Residential Lighting
50% RuleHigh EfficacyNew allowances
50% rule remainsNo limit to kitchen lighting wattsHowever 50% of total installed lighting watts must be high efficacy
High efficacy fixtures switched separately from incandescent or low efficacy fixtures
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Residential Lighting
50% RuleHigh EfficacyNew allowances
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Residential Lighting
50% RuleHigh EfficacyNew allowances
What is high efficacy?Table 150-C provides definition
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Residential Lighting
50% RuleHigh EfficacyNew allowances
What is high efficacy?Table 6-2 for LED efficacy
LED fixtures must be C.E.C. CertifiedNot all LED fixtures are high efficacy
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Residential Lighting
50% RuleHigh EfficacyNew allowances
New rules
Blank electrical boxes calculated as 180 watts low efficacy
Assumed wattage for recessed lumenaires
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Residential Lighting
50% RuleHigh EfficacyNew allowances
New rules
New wattage assumptions for CF or HID fixture that can accommodate a variety of lumenairesFor example 26w, 32w & 42 watt fixture
26w + 32w + 42w = 100w divided by 3 = 33.33wThen use wattage of lumenaire initially installed
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Residential Lighting
50% RuleHigh EfficacyNew allowances
New allowances1. Additional low efficacy wattage allowance
Only available after 50% efficacy rule met2. Kitchen has manual on vacancy sensors or dimmers3. High efficacy lumenaires and vacancy sensors in garages,
laundry rooms, closets and utility rooms
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Residential Lighting
50% RuleHigh EfficacyNew allowances
New allowancesInternal cabinet lighting allowance
20 watts per linear foot of illuminated cabinet Must be interior to cabinet and illuminated the inside of cabinet
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Residential Lighting
50% RuleHigh EfficacyNew allowances
Kitchen Lighting DocumentationNo more WS-5R (1 page)New form: CF-6R-LTG-01 (3 pages)Includes other rooms, outdoor lighting
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Residential Lighting
50% RuleHigh EfficacyNew allowances
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Residential Lighting
New form:CF-4R-LTG-1Not submitted at plan-check
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Residential Lighting
CF-4R-LTG-1For 2008not submitted at plan checkNow a constructiondocument
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Residential Lighting
2005 StandardsWS-5R is currently submitted at plan check
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Residential Lighting
#1 Bathrooms, Garages, Laundry rooms, closets & utility rooms
#2 Other Rooms
Bathrooms, Garages, Laundry Rooms, closets (less than 70 sq. ft.) & utility roomsRules unchanged for 2008
Fixtures must either be:High efficacy or, Controlled by a vacancy sensor
An occupancy sensor does not necessarily qualify as a vacancy sensorMust be manual on, auto-off
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Residential Lighting
#1 Bathrooms, Garages, Laundry rooms, closets & utility rooms
#2 Other Rooms
AtticsRegardless of square footage attics are considered “other spaces”High efficacy fixture with regular switch or…Incandescent with dimmer or vacancy sensor
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Residential Lighting
#1 Bathrooms, Garages, Laundry rooms, closets & utility rooms
#2 Other Rooms
Enclosed Patio (unconditioned)Also considered “other space”High efficacy fixture with regular switch or…Incandescent with dimmer or vacancy sensor
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Residential Lighting
Minimum efficacy
Required controls
Permanently mounted to the buildingRules slightly changed for 2008
Fixtures must either be:High efficacy or controlled by one of the following:
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Residential Lighting
Minimum efficacy
Required controls
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Residential Lighting
Minimum efficacy
Required controls
Motion Sensor requirementsAuto-on & Auto-offMust include photocell controlMust provide regular switch for manual operationMust comply with 30 minute shutoff requirement
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Residential Lighting
Minimum efficacy
Required controls
Exempt outdoor lighting
Any fixtures not attached to buildingDecorative landscape lightingPool/Spa lighting
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Scope of this Class
Changes to Envelope Requirements1
Changes to HVAC Requirements2
New Residential Lighting Requirements3
Impact of Time Dependant Valuation (TDV) 4
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TDV
Impact of Time Dependant Valuation (TDV) 4
New for 2008 Residential Standards
Previous versions of Title-24 did not account for time-of-use patternsTDV accounts for variations in cost related to time of day, seasons, geography, fuel type2008 Standards now places a higher value on energy savings during high cost timesEncourages designs that will reduce peak loads thru-out California.
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TDV
Impact of Time Dependant Valuation (TDV) 4
Example:Single family residence1800 sq. ft.Package D parameters
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TDV
Impact of Time Dependant Valuation (TDV) 4
Example:SFR residence1800 sq. ft.Package D
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TDV
Impact of Time Dependant Valuation (TDV) 4
Example:SFR residence1800 sq. ft.Package D
1ST Perf RunFront facing N
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TDV
Impact of Time Dependant Valuation (TDV) 4
Example:SFR residence1800 sq. ft.Package D
2nd Perf RunMultiple Orientations
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TDV
Impact of Time Dependant Valuation (TDV) 4
Bottom Line for 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
TDV ignored using prescriptive approach in Residential Standardsbreak
Energy Code Works, Inc.
Title-24 Building Energy Standards
Break
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Scope of this Class
New Ventilation Requirements 5
New HERS Credits6
New Forms & Registration Requirements7
Q&A 8
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Ventilation
New Ventilation Requirements 5
8
ASHRAE 62.2-2007•Requirements for local ventilation (bathrooms/kitchens)
•100 cfm range hoods/50 cfm for bath fan
•Why? Windows not being used for ventilation
•All low-rise residential buildings required to have whole house ventilation
•Window operation not a permissible method
•Mandatory measure
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Ventilation
New Ventilation Requirements 5
8
ASHRAE 62.2-2007 scope:•Kitchens/bathrooms have local exhaust vented to outdoors•Clothes dryer vented to outdoors•Combustion appliances properly vented and air systems designed to prevent backdrafting•MERV 6 filters in HVAC system•Ventilation fans must meet sound requirements
Continuously operation: 1.0 soneIntermittent fans: 3.0 sone
Additions smaller than 1000 sq. ft. exempt
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Ventilation
New Ventilation Requirements 5
8
ASHRAE 62.2-2007
What is a sone?
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Ventilation
New Ventilation Requirements 5
8
ASHRAE 62.2-2007
What is a sone?
A Sone is a measurement of sound in terms of comfortable hearing level for an average listener. The lower the sonevalue, the more comfortable the listening environment. Sones are not decibels or volume, but rather how sound is "sensed". One sone is the equivalent of a quiet refrigerator.
First proposed by Stanley Smith Stevens in 1936.
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Ventilation
New Ventilation Requirements 5
8
ASHRAE 62.2-2007Three generic solutions to meeting outside air ventilation requirements 1. Exhaust Ventilation2. Supply Ventilation3. Combination supply/exhaust
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Ventilation
New Ventilation Requirements 5
8
ASHRAE 62.2-2007Exhaust ventilation
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Ventilation
New Ventilation Requirements 5
8
ASHRAE 62.2-2007Supply ventilation
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Ventilation
New Ventilation Requirements 5
8
ASHRAE 62.2-2007Combination supply/exhaust ventilation
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Ventilation
New Ventilation Requirements 5
8
ASHRAE 62.2-2007Ventilation flow rate calculation
One cubic foot per minute (cfm) for each 100 sq. ft. of floor area plus 7.5 cfm for each occupant. The number of occupants = the number of bedrooms plus one person:
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Ventilation
New Ventilation Requirements 5
8
ASHRAE 62.2-2007Ventilation flow rate calculation
One cubic foot per minute (cfm) for each 100 sq. ft. of floor area plus 7.5 cfm for each occupant. The number of occupants = the number of bedrooms plus one person:
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Ventilation
New Ventilation Requirements 5
8
ASHRAE 62.2-2007Ventilation flow rate calculation
Question: What is the required continuous ventilation rate required for a 3 bedroom, 1,800 sq. ft. townhouse?
Formula:One cubic foot per minute (cfm) for each 100 sq. ft. of floor area plus 7.5 cfm for each occupant. The number of occupants = the number of bedrooms plus one person:
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Ventilation
New Ventilation Requirements 5
8
ASHRAE 62.2-2007Ventilation flow rate calculation
Question: What is the required continuous ventilation rate required for a 3 bedroom, 1,800 sq. ft. townhouse?
Answer:48 cfm. 1800/100 = 18 cfm
+ 3 (bedrooms) + 1 (person) x 7.5 cfm = 30 cfm30 cfm + 18 cfm = 48 cfm
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Ventilation
New Ventilation Requirements 5
8
ASHRAE 62.2-2007Ventilation flow rate calculation
Question: How would you satisfy this 48 cfm ventilation requirement?
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Ventilation
New Ventilation Requirements 5
Answer:50 cfm continuously operating local exhaustin one of the bathroomsThis also is the minimum cfm required for the local exhaustportion of ASHRAE 62.2
ASHRAE 62.2-2007Ventilation flow rate calculation
Question: How would you satisfy the 48 cfm ventilation requirement?
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Ventilation
New Ventilation Requirements 5
8
ASHRAE 62.2-2007Ventilation flow rate calculation
Intermittently operating fans will be required to have a larger cfm airflow to makeup for the fewer hours of fan operation.Required air flow rate can be 10 to 20 times greater when fans operate less than 6 hours per day.
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Ventilation
New Ventilation Requirements 5
8
ASHRAE 62.2-2007Intermittent fan flow rate calculation
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Ventilation
New Ventilation Requirements 5
8
ASHRAE 62.2-2007Controls and Operation
Must have override control readily accessibleIf intermittent fans are used must use timer
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Ventilation
New Ventilation Requirements 5
8
ASHRAE 62.2 documentation
What does this mean for the designer?
Note blockCalcsSpecsDetails on HVAC plans if incorporated into HVAC systemCF-6R MECH-5 (at inspection)Who will perform the ventilation calcs? (Title-24 consultant, HVAC designer, architect, etc)
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Ventilation
New Ventilation Requirements 5
8
ASHRAE 62.2 documentation
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Scope of this Class
New Ventilation Requirements 5
New HERS Credits6
New Forms & Registration Requirements7
Q&A 8
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Refrigerant Charge
Low Leakage AHU
Supply Duct Credits
Supply Duct
Location
Duct Sealing •Sealed and HERS verified less than 6% supply fan flow•Change-outs: 15% or less of fan flow
• Conditioned space, buried ducts
• Reduced surface area.
• NEW CEC certified AHU w/less than 2% leakage.Duct sealing & testing also required.
•CHANGED Refrigerant charge verified using one of three methods Invasive, non-invasive & CID. No TXV to trade against
HERS Measures
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Cooling Capacity
High EER
Fan Watt Draw
CCA
CID • NEW Charge Indicator Device
• NEW Requires air handling units maintain supply airflow greater than 350 cfm per nominal ton of cooling capacity across the coil
• NEW Requires fan watt draw less than 0.58 watts per cfm
• HVAC condenser & coil correctly matched to achieve high EER (above 10)
•Credit for A/C equipment having cooling capacity that meets calculated maximum cooling load.
HERS Measures
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Photovoltaic
QII
Envelope Sealing
Ice Storage
A/C
Evap Cooled Condensers
• NEW Improves EER, water use limits & duct sealing, air flow, and refrigerant charge verification required.
• NEW Shifts peak energy use to off-peak hours (Ice Bear) Additional HERS measures required
• Sealing, caulking, gaskets. Verified by HERS blower door test.
• Framing stage field verification then insulation stage verification.• New QII verification for Spray Polyurethane Foam
• Not a Title-24 credit, New Solar Home Program requirement• HERS PV verifications required.
HERS Measures
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PhotovoltaicQII
Fan Watt Draw
Cooling Coil Airflow
Refrigerant Charge
Duct Sealing
HERS Measures
HERS Measures most commonly specified for 2008:
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PhotovoltaicQII
Fan Watt Draw
Cooling Coil Airflow
Refrigerant Charge
Duct Sealing
HERS Measures
HERS Measures additional benefits
•HVAC installation quality control
Most ducts leak better than 25% of supply fan flow (new construction)
Most do not understand ramifications of duct leak (supply side & return side leaks)
•Reduces indoor air pollution
•Increased HVAC system efficiency
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PhotovoltaicQII
Fan Watt Draw
Cooling Coil Airflow
Refrigerant Charge
Duct Sealing
HERS Measures
Duct Sealing benefits
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PhotovoltaicQII
Fan Watt Draw
Cooling Coil Airflow
Refrigerant Charge
Duct Sealing
HERS Measures
HERS Measures additional benefits
•EnergyStar studies verify that over 75% of installed cooling equipment have improper refrigeration charge
Lowers efficiency by 5 to 20%
Causes premature failure
Most do not understand ramifications of duct leak (supply side & return side leaks)
•Reduces indoor air pollution
•Increased HVAC system efficiency
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PhotovoltaicQII
Fan Watt Draw
Cooling Coil Airflow
Refrigerant Charge
Duct Sealing
HERS Measures
HERS Measures additional benefits
•CCA credit addresses poorly design duct system, fewer bends, short, direct runs that maximize airflow•Goal: 350 cfm per ton in cooling mode•Test performed by HVAC contractor•Verified by HERS rater
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PhotovoltaicQII
Fan Watt Draw
Cooling Coil Airflow
Refrigerant Charge
Duct Sealing
HERS Measures
HERS Measures additional benefits
•Fan Watt Draw also seeks to improve poorly design duct system, fewer bends, short, direct runs that maximize airflow•Goal: 0.58 watts per cfm of airflow•Test using watt meter performed by installer•Verified by HERS rater
www.energycode.com Energy Code Works, Inc.
PhotovoltaicQII
Fan Watt Draw
Cooling Coil Airflow
Refrigerant Charge
Duct Sealing
HERS Measures
HERS Measures additional benefits
•HVAC installation quality controlFewer than 10% of HVAC systems have permits pulled30-50% not installed properly
•Insulation installation quality control
•Compliance failures have led to an estimated 20-30% increase in peak energy needed on hot summer afternoons.
•Estimated 30% of energy savings potential of energy codes is lost due to non-compliance.
•Inadequate understanding of degradation in performance due to poor installation
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Scope of this Class
New Ventilation Requirements 5
New HERS Credits6
New Forms & Registration Requirements7
Q&A 8
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Compliance Forms
CF-6R Installation CertificateCF-4R Field Verification/HERS
CF-1R PerformanceMF-1RCF-SR
CF-1R NewCF-1R AdditionCF-1R AlterationMF-1RCF-SR Solar Hot WaterWS-1R Thermal MassWS-2R Weighted AverageWS-3R SHGC
Prescriptive Performance Installation
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Compliance Forms
CF-1R NewCF-1R AdditionCF-1R AlterationMF-1RCF-SR Solar Hot WaterWS-1R Thermal MassWS-2R Weighted AverageWS-3R SHGC
Prescriptive
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-1R NewCF-1R AdditionCF-1R AlterationMF-1RCF-SR Solar Hot WaterWS-1R Thermal MassWS-2R Weighted AverageWS-3R SHGC
Prescriptive
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-1R NewCF-1R AdditionCF-1R AlterationMF-1RCF-SR Solar Hot WaterWS-1R Thermal MassWS-2R Weighted AverageWS-3R SHGC
Prescriptive
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-1R NewCF-1R AdditionCF-1R AlterationMF-1RCF-SR Solar Hot WaterWS-1R Thermal MassWS-2R Weighted AverageWS-3R SHGC
Prescriptive
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-1R NewCF-1R AdditionCF-1R AlterationMF-1RCF-SR Solar Hot WaterWS-1R Thermal MassWS-2R Weighted AverageWS-3R SHGC
Prescriptive
Roles & ResponsibilitiesDocumentation AuthorSignature certifies documentation is accurate & completeNot responsible specification of the building design features
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-1R NewCF-1R AdditionCF-1R AlterationMF-1RCF-SR Solar Hot WaterWS-1R Thermal MassWS-2R Weighted AverageWS-3R SHGC
Prescriptive
Roles & ResponsibilitiesDesignerResponsible for overall building designResponsible for specifications on CF-1RSubject to California Business & Professions Code
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-1R NewCF-1R Addition NEWCF-1R Alteration NEWMF-1RCF-SR Solar Hot WaterWS-1R Thermal MassWS-2R Weighted AverageWS-3R SHGC
Prescriptive
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-1R NewCF-1R Addition NEWCF-1R Alteration NEWMF-1RCF-SR Solar Hot WaterWS-1R Thermal MassWS-2R Weighted AverageWS-3R SHGC
Prescriptive
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-1R NewCF-1R Addition NEWCF-1R Alteration NEWMF-1RCF-SR Solar Hot WaterWS-1R Thermal MassWS-2R Weighted AverageWS-3R SHGC
Prescriptive
2005 MF-1R 2 pagesCheck boxes
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Compliance Forms
CF-1R NewCF-1R Addition NEWCF-1R Alteration NEWMF-1RCF-SR Solar Hot WaterWS-1R Thermal MassWS-2R Weighted AverageWS-3R SHGC
Prescriptive
2008 MF-1R 3 pages
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Compliance Forms
CF-1R NewCF-1R Addition NEWCF-1R Alteration NEWMF-1RCF-SR Solar Hot WaterWS-1R Thermal MassWS-2R Weighted AverageWS-3R SHGC
Prescriptive
2008 MF-1R
Mandatory measures on MF-1R form will constitute minimum component performance specifications even if not called out elsewhere on plans
Other measures on CF-1R may supersede minimum measures on MF-1R form
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-1R NewCF-1R Addition NEWCF-1R Alteration NEWMF-1RCF-SR Solar Hot WaterWS-1R Thermal MassWS-2R Weighted AverageWS-3R SHGC
Prescriptive
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-1R PerformanceMF-1RCF-SR
Performance
5 pages instead of 3
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Compliance Forms
CF-1R PerformanceMF-1RCF-SR
Performance
Part 2 should be filled out
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Compliance Forms
CF-1R PerformanceMF-1RCF-SR
Performance
Electronic signatures will be common and unavoidable with registration
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Compliance Forms
CF-6R Installation CertificateCF-4R Field Verification/HERS
Installation
CF-6R Installation forms
Reworked significantly
Now include measures previously on MF-1R and other forms (WS-5R)
Separated into Envelope, Lighting & HVAC
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-6R Installation CertificateCF-4R Field Verification/HERS
Installation
CF-6R Installation forms
Purpose of CF-6R forms?
“To verify that the contractor is aware of the requirements of the building energy standards and they have followed the CEC approved procedures for installation”
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-6R Installation CertificateCF-4R Field Verification/HERS
Installation
CF-6R Installation forms
Who fills out CF-6R forms?
General contractor or;Specialty subcontractors
When are they submitted?
Not at plan check
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-6R Installation CertificateCF-4R Field Verification/HERS
Installation
CF-6R Installation forms
Completed and signed CF-6Rs must be posted at building site for review by inspectors. Required for final inspection
Some CF-6R always require HERS verification
Some do not
HERS rater will need the completed CF-6R forms before they can fill out their CF-4R forms.
When registration is required CF-6R’s must be available
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-6R Installation CertificateCF-4R Field Verification/HERS
Installation
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-6R Installation CertificateCF-4R Field Verification/HERS
Installation
CF-6R example
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-6R Installation CertificateCF-4R Field Verification/HERS
Installation
CF-6R example
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-6R Installation CertificateCF-4R Field Verification/HERS
Installation
CF-6R example
Contractor responsible for repairs necessary to pass HERS verification tests
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-6R Installation CertificateCF-4R Field Verification/HERS
Installation
CF-6R Installation forms
Also…They are legally binding document
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-6R Installation CertificateCF-4R Field Verification/HERS
Installation
CF-6R bottom line:
CF-6R forms a major part of Title-24 compliance now. The real “teeth” in the new code.
Contractors need to be familiar with CF-6R forms and have information gathered to fill out form.
Also will need to review CF-1R during bid process to determine if any HERS measures will affect their work
Will require coordination between Designer, Title-24 consultant and HERS raters
CF-6R forms filled out by hand will be unwieldy because of requirements to file electronically
Will need a system to provide documentation package to inspector, HERS rater, & homeowner & registry if necessary
Homeowner receives CF-1R,CF-6R, CF-4R, operation & maintenance information for all features and devices.
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-6R Installation CertificateCF-4R Field Verification/HERS
Installation
CF-4R Installation forms
Responsibility of HERS Rater
Certificates of Field Verification and Diagnostic Testing
CF-4R filled out by hand not acceptable
Question: Can the homeowner sign the CF-6R form(s)?
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-6R Installation CertificateCF-4R Field Verification/HERS
Installation
CF-4R Installation forms
Question: Can the homeowner sign the CF-6R form(s)?
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-6R Installation CertificateCF-4R Field Verification/HERS
Installation
CF-4R Installation forms
Question: Can the homeowner sign the CF-6R form(s)?
Answer: yes
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-6R Installation CertificateCF-4R Field Verification/HERS
Installation
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-6R Installation CertificateCF-4R Field Verification/HERS
Installation
Certificate of Compliance (CF-1R)
Prepared by Title-24 consultant or designer
Submitted to plancheck and approved copy provided to General
Contractor
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-6R Installation CertificateCF-4R Field Verification/HERS
Installation
Certificate of Installation (CF-6R)
Filled out by contractor and sub-contractors
Provided to inspector & HERS Rater & later to the homeowner
Certificate of Compliance (CF-1R)
Prepared by Title-24 consultant or designer
Submitted to plancheck and approved copy provided to General
Contractor
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-6R Installation CertificateCF-4R Field Verification/HERS
Installation
Certificate of Verification and Diagnostic (CF-4R)
Completed by HERS Rater Registered with CHEERS or Calcertsand copy provided to contractor
Certificate of Installation (CF-6R)
Filled out by contractor and sub-contractors
Provided to inspector & HERS Rater & later to the homeowner
Certificate of Compliance (CF-1R)
Prepared by Title-24 consultant or designer
Submitted to plancheck and approved copy provided to General Contractor
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-6R Installation CertificateCF-4R Field Verification/HERS
Installation
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-6R Installation CertificateCF-4R FieldVerification/HERS
Installation
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-6R Installation CertificateCF-4R Field Verification/HERS
Installation
CF-4R bottom line:
CF-4R also forms a major part of Title-24 compliance now.
Many HERS verifications are now baseline, required on most projects
Contractors will need to know their responsibilities related to different HERS measures
Contractors need to inspect and test their workHERS raters verifies
Good coordination essential. HERS rater will need to be contacted well ahead of required inspections
Good record keeping crucial
CF-4R major part of utility incentive programs
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-6R Installation CertificateCF-4R Field Verification/HERS
Installation
CF-4R bottom line:
HERS raters must maintain independence
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-6R Installation CertificateCF-4R Field Verification/HERSRegistration
Registration
Registration
New concept and new requirement
Introduced in stages thru 2010
January 1, 2010 required for low-rise residential buildings, multiple orientations , & HERS measures
Starting October 1, 2010 registration required for ALL low-rise residential buildings with HERS measures
CF-1R, CF-6R, CF-4R required to be submitted electronically to HERS provider (CHEERS or CalCerts)
Registry available to authorized users of HERS data registry
Includes energy consultants, builders, owners, contractors, installers, HERS raters, building departments, C.E.C.
www.energycode.com Energy Code Works, Inc.
Compliance Forms
CF-6R Installation CertificateCF-4R Field Verification/HERSRegistration
Registration
Implications:
If registration required building department will require registered copies of CF-1R , CF-6R, and CF-4R that display their unique registration number
Contractors may not be set up to submit their CF-6R forms electronically for registration
Can use services of HERS raters to facilitate transmittal of CF-6R to registry. However contractor is responsible for content of CF-6R and must sign. HERS rater cannot certify information on a CF-6R form.
The days of filling out CF-6R on the hood of contractors work truck are basically over
Good communication and record keeping criticalUse time left to put into place filing system/record keeping system
Registration
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Preparation for 1/1/2009
Energy Consultants1
Download Standards, Manual, Appendixeshttp://www.energy.ca.gov/title24/2008standards/index.html
Attend training seminars for approved software
Develop record keeping procedure for registration requirement
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Preparation for 1/1/2009
Architects/Designers2
Set up drawing files to accept all forms required on plans
Set up note blocks for ASHRAE 62.2 requirements
Requirement for load calcs should be part of HVAC bid-spec
Window selection cannot be put off until building under construction. Using default U-factors/SHGC for plan-check submittals will make it difficult if not impossible to comply.
Bring Title-24 consultant on board early in design stage
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Preparation for 1/1/2009
HVAC Contractors3
Be prepared to perform rough-in duct testing (4% leakage)HERS rater can do this for you
Provide training to your installers for proper duct sealing, airflow, refrigerant charge to minimize HERS verification failures
Prepare proper load calcs for every job and have documentation ready.
Will need system for providing access holes, sensors, and labeling to avoid holdups in HERS verifications
Be prepared to fill out electronically CF-6R for HVAC new and change-outs
Develop system to record and track CF-6R forms that will be needed later in HERS process or incentive process
Develop good relationship with local HERS rater(s) HERS rater cannot be part of your company in any way shape or form, cannot self-verify. HERS raters are audited annually.
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Preparation for 1/1/2009
Building Officials4
Download Standards, Manual, Appendixeshttp://www.energy.ca.gov/title24/2008standards/index.html
Building departments will need to set up access to HERS provider data registry.
Understand which documents required at plan-check and which are required at inspection (CF-1R, CF-6R, kitchen lighting, CF-4R)
Forms are much more data intensive. Get familiar with new layout of forms and all the data that is now required. Address wet signature verses electronic signature issue ahead of time.
HERS measures now baseline. Submittals that comply without them should be reviewed closely.
Inspectors will need to be familiar with all of the CF-6R forms.If registration required must be registered CF-6R forms, not filled out by hand.
Training on ASHRAE 62.2 highly recommended. Become familiar with ventilation calculation methods fan/control features that satisfy this requirement. Important for on-site building inspector, not at plancheck.
Energy Code Works, Inc.
Mark Madison CEPE, CEA, AEE, HERS Rater, GreenPoint Rater, ResNet Rater, Member CABEC, CHEERS