Block Energy Design - Cabrillo Collegesmurphy/block2009energyefficiency.pdf · New Solar Homes PartnershipNew Solar Homes Partnership • Energy Efficiency First ... Microsoft PowerPoint

Block Energy Design• Green Building Consulting and Verification• Energy Compliance (Title 24)• Energy Compliance (Title-24)• Energy Efficiency Optimization For LEED,

Savings by Design GreenPoint RatingSavings by Design, GreenPoint Rating, New Solar Homes Partnership

• Certified HERS & GreenPoint Rater for• Certified HERS & GreenPoint Rater for New and Existing Construction

• LEED for Homes• LEED for Homes• Whole House Energy Ratings/Audits for

Existing Homes1

Existing Homes

Impact of U.S. B ildi

Energy6 % f h T l U S El i iBuildings on

the E i t

65% of the Total U.S. Electricity Consumption

30% of U S Greenhouse Gas EmissionsEnvironment 30% of U.S. Greenhouse Gas Emissions

ResourcesResources136 Million tons of construction and demolition wastedemolition waste

40% (3 billion tons annually) of global raw materialsmaterials

Water2

Water12% of Potable water use in the U.S.

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Title 24 or the California Building Energy g gyEfficiency Standards

For the past 30 years, while per capita electricity consumption in the US has increased by nearly 50 percent, California electricity use per capita haspercent, California electricity use per capita has been approximately flat. This achievement is the result of continued progress in cost-effective building and appliance standards and ongoingbuilding and appliance standards and ongoing enhancements to efficiency programs. Since the mid-1970s, California has regularly increased the energy efficiency requirements for new appliances sold and new buildings constructed here.

• It’s about Global Climate ChangeIt s about Global Climate Change• AB 32 California Global Warming

Solutions Act of 2006Solutions Act of 2006• State must develop a plan to reduce

GHG to 1990 levels by 2020GHG to 1990 levels by 2020• About Rapidly Advancing Energy

Effi iEfficiency• Using the Building Standards and

Appliance Standards as a Tool• To Bring About Change

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Energy Standards Called Upon to Deliver

• Reduced Energy Bills• Reduced Air Pollution• Reduced Greenhouse Gas

Emissions• Increased Energy System

Reliability• Increased Comfort• Improved Indoor Air Quality• Reduced Construction Defects

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Wh t i Titl 24?What is Title 24?Part of the California Code of Regulations• Title 20 is the Appliance standards• Title 24, Part 1 is the Administrative

Regulationsg• Title 24, Part 6 is the Building Energy

Efficiency Standards for Residential andEfficiency Standards for Residential and Nonresidential buildings

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Who’s involved in the ProcessWho s involved in the Process• Building department is the enforcement

agency. HERS rater also assist in this function.

• Energy Analyst provides energy compliance documents (usually computer p ( y pperformance method)

• HERS Rater – CEC certified Third PartyHERS Rater CEC certified Third Party verification or like a “special Inspector”

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Prescriptive vs PerformancePrescriptive vs. Performance

• Performance method or computerPerformance method or computer modeling is most commonly used

• Based on Annual Energy usage in• Based on Annual Energy usage in Btu/sq.ft./yearAll t d ff f f t f• Allows trade offs of energy features for construction flexibility

• Prescriptive method good for additions

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What’s in an Energy Analysis?• Building Envelope – Insulation of roof,

walls, floor, air infiltration, radiant barriers• Fenestration (or Windows) U-factor,

SHGC• Space heating system – Efficiency of the

heating unit, distribution system (air ducts g , y (or hydronic radiant), tight duct system

• Water heating- storage type on-demandWater heating storage type, on demand, solar

• Does not include lighting & appliances11

• Does not include lighting & appliances

HERS & Energy Compliance

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Energy Efficiency Standards and HERS Igy y

• HERs credits are included in the energyHERs credits are included in the energy code such as quality of insulation installation duct testing air infiltrationinstallation, duct testing, air infiltration

• Energy code provides basis for many programs such as Energy Star LEED forprograms such as Energy Star, LEED for Homes, GreenPoint Rated, New Solar Homes PartnershipHomes Partnership

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CF-6R Installation Certificate

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CF-4R HERS Verification

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Energy Star New HomesEnergy Star New Homes

• Homes must be 15% better than CaliforniaHomes must be 15% better than California Energy Code

• Must be inspected by a CEC certified third• Must be inspected by a CEC certified third party HERS RaterD t k t t t t t 6% l f• Ductwork must test out at 6% or less of total air flow (tight duct system)

• Thermal Bypass Checklist for Insulation

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2020

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New Solar Homes PartnershipNew Solar Homes Partnership• Energy Efficiency First• 15% better than

Standard Design E B d tEnergy Budget

• Expected Performance Based Incentive for PVBased Incentive for PV

• Field Verified Performance of EnergyPerformance of Energy Efficiency and Photovoltaic

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Photovoltaic

The Opportunity -HERS IIpp y• Over 13 million residential

unitsunits • 70% of the existing

housing stock was built gbefore 1978 with limited energy efficiency measures

• Large potential for energy ffi i i tefficiency improvements

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Tools of theTools of the Trade

•Energy audit/survey•Energy modeling•D t T ti•Duct Testing•Blower Door testing•Combustion SafetyyBackdraft test

•Report results•HERS indexHERS index

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www.energy.ca.gov• Title 24 Building Standards• Compliance ManualsCompliance Manuals• New Solar Homes Partnership• www.gosolarcalifornia.org• HERS organizations• www.CHEERS.ORG

WWW CBPCA ORG• WWW.CBPCA.ORG• WWW.CALCERTS.COM• Green Building OrganizationsGreen Building Organizations• www.builditgreen.org• www.usgbc.org

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