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Best Practices for HPA/HPW Construction Presented by: Rob Starr, - - PowerPoint PPT Presentation
Best Practices for HPA/HPW Construction Presented by: Rob Starr, - - PowerPoint PPT Presentation
Best Practices for HPA/HPW Construction Presented by: Rob Starr, Residential Training Manager, ConSol About ConSol Energy consulting local, state and national Energy analysis and design Mechanical engineering - focused on
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About ConSol
- Energy consulting – local, state and national
- Energy analysis and design
- Mechanical engineering - focused on hot and dry
- Inspections and diagnostics – residential and commercial
- Auditor for retrofit programs for Central Valley, CA
- One of two CEC certified registries for CA Energy Code
- Residential
- California - Chair, CBIA Energy and Codes Committee
- Governor’s Advisory Board - CALGreen
- NAHB – Energy and Green Subcommittees, Energy Efficient Buildings Tax Credit
Working Groups
- NGBS 2015 ICC-700 Consensus Committee
- Commercial
- California Building Properties Association
- BOMA California, NAOIP, ICSC, IREM, RILA
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2016 Title 24 Building Efficiency Standards
- Five significant changes went into
effect on January 1, 2017 – High Performance Attics (HPA) – High Performance Walls (HPW) – 0.82 EF Tankless Water Heaters – High Efficacy lighting – Solar Trade-Off
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High Performance Attics (HPA)
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What are the Prescriptive Requirements for High Performance Attics?
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OPTION A – ABOVE ROOF DECK
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- Requires Insulation Above the Roof Rafters, directly in contact
with the roof deck
- R6 required when an air gap is present
- R8 required when no air gap is present
- Requires Radiant Barrier to be installed
- Requires R38 insulation above the ceiling lid
- Requires a ventilated attic
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DETAIL OF INSULATION ABOVE THE ROOF DECK
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DETAIL OF INSULATION ABOVE ROOF RAFTER
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OPTION B – BELOW ROOF DECK
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- Requires Insulation Below the Roof Deck, Installed between the
roof rafters
- R13 required when an air gap is present
- R18 required when no air gap is present
- No Radiant Barrier to be installed
- Requires R38 insulation above the ceiling lid
- Requires a ventilated attic
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BELOW ROOF DECK WITH AIR GAP
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DETAIL OF INSULATION BELOW DECK
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DETAIL OF INSULATION BELOW DECK
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OPTION C – DUCTS IN CONDITIONED SPACE
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- Requires air handler and ducts to be in conditioned space
- Requires radiant barrier to be installed – CZ dependent
- Requires R30/38 installed at ceiling – CZ dependent
- Requires a ventilated attic
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DETAIL OF DUCTS IN CONDITIONED SPACE
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DETAIL OF DUCTS IN CONDITIONED SPACE
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DETAIL OF DUCTS IN CONDITIONED SPACE
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PERFORMANCE OPTION –SEALED UNVENTED
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- Requires complete air sealing between attic and exterior
- Requires minimum insulation levels at underside of roof deck
- Does not require radiant barrier
- Does not require insulation at ceiling
- Does not require venting
- Does not qualify for ducts in conditioned space
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DETAIL OF SEALED UNVENTED ATTIC
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High Performance Walls (HPW)
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What is a High Performance Wall?
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U FACTOR TABLES FOR 16” OC
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U FACTOR TABLES FOR 24” OC
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High Performance Walls
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High Performance Walls
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Window Detail – Wood Buck
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Window Detail – Thermal Buck
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Window Detail – No Buck
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Window Detail – With Wood Buck
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WATERPROOFING WHERE RIGID SHEATHING IS WATER BARRIER
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Resources
www.wisewarehouse.org HPA Protocol Reference Manual HPW Protocol Reference Manual HPW/HPW Product and Strategy Assessment Manufacturer Specific Installation Guides
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