Bright Green Strategies Green Building Consulting and Verification Certified LEED for Homes Green Rater, GreenPoint Rated for New and Existing Homes, HERS (Home Energy Rating System) Energy modeling for energy compliance (Title- 24), LEED NC Optimized Energy Performance, Building Integration, LEED for Homes, GreenPoint Rated, New Solar Homes Partnership Whole House Energy Ratings/Audits for Existing Homes 1
Today s Topics Energy Modeling What is it for? Why do it? Home Energy Rating Systems Or field verification and testing for Energy Compliance, Home Performance and Green Building Certification What are the synergies between the two? 2
Energy Modeling Are you an Energy Nerd?
What are the Skill Sets? Very technical field Detailed Oriented Are you able to communicate complex information in a way that your clients can understand? Different types of people interpret information differently. Getting to know this takes time & experience 4
Energy Modeling What is it for? To make informed Decisions evaluate energy efficiency i approaches Building Integration (architecture integrated t with daylighting), Passive solar A benchmark tool for comparision estimate energy savings for existing building retrofits Life Cycle Cost Analysis Evaluate points for LEED, GreenPoints
Energy Pro, Micropas, Equest, Energy 10 Enter data from plans or measurements Building orientation Must be familiar with U-factors, SHGC, types of construction Mechanical systems types, efficiency ratings ie. Forced air=afue, Heatpump=COP Water Heating systems, Solar hot water, distribution Synergies - HERS testing 6
Integrated Design Process Need Architect, Owner, Mechanical engineer or consultant, General contractor, solar contractor Need to think through all the options before finalizing the design. Otherwise, it can be costly to make changes later 7
Let s do LEED! 8
Energy Efficiency Standards and HERS HERS credits are included in the energy code such as quality of insulation installation, duct testing, air infiltration Energy code provides basis for Energy Star New Homes, LEED for Homes, GreenPoint Rated, & New Solar Homes Partnership 9
Energy Star New Homes Homes must be 15% better than California Energy Code (however the higher you go the more points) Must be inspected by a CEC certified third party HERS Rater Ductwork must test out at 6% or less of total air flow (tight duct system) Thermal Bypass Checklist for Insulation 10
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Title-24 Energy Compliance Performance method or computer modeling is most commonly used Based on Annual Energy usage in Btu/sq.ft./year Allows trade offs of energy features for construction flexibility Does not include lighting & appliances
HERS & Energy Compliance 15
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EEM Energy Efficient Mortgage Life Cycle Cost based on Energy Savings and the Installed cost of the measure 17
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Tools of the Trade Energy audit/survey Energy modeling Duct Testing Blower Door testing Combustion Safety Backdraft test Report results HERS index
The Opportunity -HERS II Over 13 million residential units 70% of the existing housing stock was built before 1978 with limited energy efficiency measures Large potential for energy efficiency i improvements
The State of Affairs Would you want to breathe this air? Leaky Ducts - most duct systems leak 30% 21
HERS II - Home Energy Rating for Existing Homes Energy Audit Solution Retrofit Commissioning i i Quality Assurance
Retrofitting Loading Order Fundamentals Major Systems Renewables Insulation Air Sealing Heating Duct Sealing Air Conditioning Lighting Ventilation Appliances Water Heating Water Conservation Plug Loads Behavior Solar PV Solar Thermal Wind Water Catchment
Home Performance- a whole systems approach Energy Audit Solution Retrofit Commissioning i i Quality Assurance 1? Products 2 Performance Home 85 Energy Rating System
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www.energy.ca.gov Title 24 Building Standards Compliance Manuals New Solar Homes Partnership www.gosolarcalifornia.org HERS organizations www.cheers.org WWW.CBPCA.ORG WWW.CALCERTS.COM Green Building Organizations www.builditgreen.org www.usgbc.org