RECEIVE A PRESENTATION ON THE COUNTY’S …cms6ftp.visioninternet.com/novato/agendas/pdfstaff...As Marin County moves towards 100% renewable electric power which avoids greenhouse

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STAFF REPORT

MEETING DATE: August 28, 2018

TO: City Council

FROM: Robert Brown, Community Development Director

PRESENTER: Robert Brown

SUBJECT: RECEIVE A PRESENTATION ON THE COUNTY’S GREEN BUILDING REGULATIONS AND DIRECT STAFF ON WHETHER TO PREPARE SIMILAR BUILDING CODE REVISIONS FOR CONSIDERATION

REQUEST

Receive a presentation on the recently adopted Marin County Green Building Regulations and provide direction to staff as to whether to prepare similar building code revisions for possible adoption.

BACKGROUND

On November 15, 2016, the City Council adopted the 2016 California Building Standards Code with local amendments. Included in these amendments were enhanced green building requirements for newly constructed buildings in Novato. The City has adopted green building and energy efficiency standards that go beyond the base state building code, known as “reach codes,” since 2009. The state building code has included the CALGreen code provisions since 2010, requiring materials and construction methods to reduce resource consumption, reduce water use and waste, increase energy efficiency and improve indoor air quality. The CALGreen code has mandatory green building requirements, and offers optional “Tiers” of enhanced requirements that local agencies may adopt through a prescribed process. The state goal is to increase energy efficiency requirements in each 3-year code adoption cycle to achieve net zero energy homes by 2020 and commercial structures by 2030.

In 2016, Novato adopted local building code amendments which require that new residential and commercial structures achieve CALGreen Tier 1 standards, which exceed base state code requirements. Novato also adopted local amendments which require that new residential structures achieve an energy budget which is 15% below base code standards. Novato was the only Marin jurisdiction that adopted increased energy efficiency requirements during the 2016 code adoption. At the time of the 2016 code adoption, the County of Marin committed to investigating additional “reach code” standards that could be adopted prior to the 2019 California Building Standards Code, which will occur in December 2019, with the goal of having multiple Marin cities adopt a similar enhanced code.

922 Machin Avenue Novato, CA 94945

415/ 899-8900 FAX 415/ 899-8213

www.novato.org

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The County adopted new green building standards in March 2018 which include a range of green building and energy efficiency requirements in new construction, additions, and alterations to residential and commercial buildings. The standards were developed as templates that can be applied in any of Marin’s cities, and the County is encouraging other local jurisdictions to consider adoption of consistent standards.

DISCUSSION The County’s ordinance addresses the following objectives: Sustainability/Green Building Measures

The ordinance applies Tier 1 enhanced green building standards (which include use of environmentally-preferable materials, water use, waste generation, indoor air quality and project location and design measures) to construction projects including both new buildings and remodels/additions over 750 square feet for residential projects and 3,000 square feet for commercial projects. The State CALGreen code in 2016 eliminated green building standards applicable to remodels, which the County reach code now addresses, recognizing the large portion of projects in Marin of this nature Energy Efficiency

The County’s ordinance applies increased energy efficiency requirements to new residential dwellings as follows:

Energy Efficiency Options

W/o Solar PV With Solar PV All-Electric

Single Family

Less than 4,000 sf 15% more efficient than base code

20% more efficient than base code Base code

4,000+ sf

n/a

35% more efficient than base code plus

generate on-site annual electricity

demand

20% more efficient than base code plus min. 2.5 kW of solar

Multi-Family

1-3 stories 10% more efficient than base code

15% more efficient than base code Base code

4+ stories 10% more efficient than base code n/a Base code

The County has prepared summaries of the reach code requirements for each project type (single-family, multi-family and non-residential, both for new construction and for remodels/additions), which are provided as Attachment 1.

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Emphasis on Performance vs. Prescriptive Measures

The County ordinance responds to building industry requests for flexibility in green building requirements. The County considered adoption of a mandatory solar ordinance which a handful of other California jurisdictions have enacted. Since the topography and vegetation in Marin make many properties unsuitable for solar photovoltaic panels, the ordinance uses a provision of the State Energy Code which provides energy credit for installing solar, but the ordinance also provides other options to achieve a reduced energy budget without solar.

As Marin County moves towards 100% renewable electric power which avoids greenhouse gas emissions, the County’s ordinance seeks to incentivize all-electric new buildings. In conjunction with the state building code (Title 24), the California Energy Commission approves software with each update of the state code to measure compliance with the adopted energy efficiency standards (e.g., energy budget). Currently, this software “weights” natural gas and electrical energy sources differently, and in practice makes it difficult to construct all-electric buildings. The County code includes energy efficiency compliance options that allow applicants to meet (rather than exceed) the state energy budget requirements if the project is all electric in order to address this imbalance and promote a reduction in fossil fuel use countywide. Electric Vehicle Charging

To reduce barriers to the purchase of electric vehicles, the County code increases requirements for electrical service installation in conjunction with both new construction and remodels. All new single-family homes would be required to add additional capacity to the electric service panel to allow for a Level 2 (240 volt) charging unit. This service panel upgrade would also be required for remodels where the service panel is being expanded. For multi-family and commercial development, when new parking lots or garages are added or modified, 10% of the new parking spaces must have all electrical connections installed with the exception of an EV charger (known as “EV ready”), and an additional 10% of the spaces must have empty electrical conduit laid to be available for future use for additional chargers. In lots with greater than 10 spaces, the remaining 90% of spaces need to have empty electrical conduit laid to reduce future barriers, but only a limited amount of electrical service capacity must be reserved. The following table compares the County ordinance requirements with those in place in Novato:

Project Type Current Novato Requirements New County Requirements

Single-Family, New CALGreen Tier 1 plus:

15% energy reduction in all new homes

CALGreen Tier 1, plus:

Energy:

Homes < 4,000 sf: 15% energy reduction w/o solar, or 20% energy reduction w/ solar or all-electric

Homes > 4,000 sf: 35% energy reduction and net zero energy* or all-electric home with 20% energy reduction and min. 2.5 kW of solar

EV charging: EV ready (dedicated 240v circuit)

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Project Type Current Novato Requirements New County Requirements

Single-Family, Addition/Remodel

Base building code <750 sf: CALGreen compliance

>750 sf: CALGreen Tier 1

If modifying electrical service panel: EV ready circuit

Multi-Family, New CALGreen Tier 1 plus 15% energy reduction

CALGreen Tier 1, plus:

Energy: 10% energy reduction w/o solar, or 15% energy reduction w/ solar or all-electric

EV charging: Adding/modifying 2-10 parking spaces: 2 EV ready Adding/modifying >10 spaces: 10% EV ready and 10% EV capable (conduit installed)

Multi-Family, Addition/Remodel

Base building code <750 sf: CALGreen compliance

>750 sf: CALGreen Tier 1

Adding/modifying >10 spaces: 10% EV ready and 10% EV capable (conduit installed)

Non-Residential, New

Base CALGreen code CALGreen Tier 1, plus:

Energy: 10% energy reduction or all-electric


Non-Residential, Addition/Remodel

Base building code <3,000 sf: CALGreen compliance

>3,000 sf: CALGreen Tier 1


Increased Construction Costs

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The enhanced green building and energy efficiency requirements will add costs to new construction and remodels, although green building techniques (construction waste reduction, topsoil protection, better joint sealing, etc.) are generally becoming standard practice. To require more stringent energy efficiency standards than the base state code, a jurisdiction must demonstrate to the California Energy Commission that the additional requirements are cost effective, meaning they will pay for themselves through energy savings over the life of the project. Cost effectiveness studies were funded in 2017 by PG&E for all California climate zones for single-family, multi-family and non-residential new buildings, but not for additions/remodels. A state-wide cost effectiveness study found that the proposed County energy efficiency requirements would be a cost-effective investment in Novato’s climate zone (Climate Zone 2), meaning that the up-front investment in solar panels, increased insulation, more efficient mechanical, lighting and appliances would be more than compensated by the value of energy savings over the useful life of the products.

The cost assumptions associated with the additional green building measures are listed in Attachment 2. For a new single family dwelling of 2,430 square feet, the assumed additional costs of added insulation, more efficient mechanical equipment (fan, furnace, air conditioner) and windows, and sealing of air leaks totaled $4,600, and the addition of photovoltaic panels would add an additional $7,000, for a total of $11,600. The cost of construction of this size new home would be approximately $1,215,000, so the added green building measures would constitute less than a 1% increase in costs. For a multi-family unit of 1,000 square feet, the added measures would total about $5,340 per unit, or less than 2% of construction costs. Again, these measures have been calculated to save homeowners more than the initial expense through long-term energy savings.

It is likely for new single-family homes and apartment/condominium structures that the City will require applicants to hire a CALGreen special inspector to ensure the enhanced green building measures are incorporated into the field construction. This typically adds about $1,000 to project costs for a new single-family home, or about $1,500 for a moderately sized apartment or condominium project. By comparison, the City’s initial green building ordinance (the BERST model ordinance) required a special Green Point Rater inspector, which commonly cost over $2,000 for a new single-family home or over $7,000 for a new multi-family development. It is expected that City building inspectors would inspect for CALGreen measures in most remodeling projects.

PUBLIC OUTREACH The County incorporated extensive public outreach, including building trades and the Marin Builders Association, in their code development and adoption process. If the City Council elects to consider adoption of similar regulations, staff would reach out to the building industry for input. FISCAL IMPACT Adoption of additional green building measures would not impact the General Fund nor substantially impact staff workload. It would, however, likely increase construction costs by a small amount, although long-term energy savings would more than compensate for up-front costs. ALTERNATIVES

• Direct staff to prepare an ordinance modifying local building code amendments to

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incorporate green building measures similar to those adopted in Marin County

• Direct staff to prepare an ordinance modifying local building code amendments relating to green building options that differ from Marin County’s

• Direct staff to consider reach code adoption as part of the 2019 state building code adoption in fall, 2019.

ATTACHMENTS

1. Summaries of Marin County green building requirements 2. Excerpt from Cost Effectiveness Study

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[JURISDICTION NAME] GREEN BUILDING GUIDE SINGLE FAMILY RESIDENTIAL: NEW CONSTRUCTION

These green building standards have been established to ensure that new homes built in

[jurisdiction name] are healthy for occupants, have limited impact on the environment, reduce

demand for energy, and save the homeowner and occupants money over time. This guide is

intended to help applicants understand the green building requirements that apply to their project

and what documentation is necessary to comply with these standards.

GREEN BUILDING PROJECT TIMELINE

1PROJECT DESIGN It is important for project owners, architects, engineers, and designers to understand the

applicable state and local green building requirements prior to project design. Early

consideration of these standards allows for design of buildings and systems that are

compliant, energy efficient, and cost effective. [jurisdiction name]’s single family green

building standards are different depending on project size, and multiple compliance

methods are available to ensure flexibility for applicants.

2PLANNING APPLICATION (IF REQUIRED) If your project is subject to planning review, be prepared to identify in your planning

application what compliance methods you’ve selected and how you plan to meet the

requirements. If you anticipate difficulties meeting the requirements outlined in the Green

Building Checklist, these concerns and any requests for exemptions should be identified

in your planning application.

3INITIAL BUILDING PERMIT SUBMITTAL Include the following with your initial application for a building permit:

Completed Green Building Checklist (page 2 of this document)

Completed checklist from the selected green building compliance method

Title 24 Part 6 energy calculations demonstrating compliance with selected energy

efficiency compliance method

Incorporate selected measures on a separate, full-sized plan sheet, and include it

with building plans.

4FINAL INSPECTION When the project is completed, submit finalized checklists, including a Statement of

Conformance from the field verifier attesting to the accuracy of the assessment, with the

final permit materials to the building department to have the green building hold lifted.

For more information, please visit [website]

Attachment 1

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[JURISDICTION NAME] GREEN BUILDING CHECKLIST SINGLE FAMILY RESIDENTIAL: NEW CONSTRUCTION 1

STEP 1: FOR ALL PROJ ECTS , SELECT ONE GREEN BUILDING REQUI REMENT C O M P L I A N C E M E T H O D : R E Q U I R E M E N T : F I E L D V E R I F I E R :

☐ C A L G R E E N T I E R 1 Develop the proposed home to CALGreen

Tier 1 CALGreen Inspector

☐G R E E N P O I N T R A T E D Achieve Silver Certification Level Green Point Rater

☐ L E E D F O R H O M E S Achieve LEED for Homes Silver LEED AP

STEP 2A (FOR HOMES <4,000 SQ UARE FEET): SELECT ONE ENERGY EFFICIENCY ME THOD 2 C O M P L I A N C E M E T H O D : R E Q U I R E M E N T : F I E L D

V E R I F I E R : ☐ P R O J E C T W I T H O U T S O L A R

If a photovoltaic system is not installed, demonstrate3

that the energy use of the proposed home is 15% more

efficient than the 2016 State Energy Code. HERS Rater,

where verification

is required4 ☐ P R O J E C T W I T H S O L A R

If a photovoltaic system is installed, demonstrate3 that

the energy use of the proposed home is 20% more

efficient than the 2016 State Energy Code.

☐ A L L -E L E C T R I C Demonstrate that the proposed home will be all electric5

STEP 2B (FOR HOMES ≥4,000 SQUARE FEET) : SELECT ONE ENERGY EFFICIENCY ME THOD 2

C O M P L I A N C E M E T H O D : R E Q U I R E M E N T : F I E L D

V E R I F I E R :

☐ Z E R O N E T E L E C T R I C I T Y

Demonstrate3 that the proposed mixed-fuel6 home:

is 35% more efficient than the 2016 State Energy Code

will generate as much electricity on-site as it is expected

to use in a year, equivalent to an energy design rating

(EDR) of 20 or less.

HERS Rater,

where

verification is

required4 ☐ A L L -E L E C T R I C A L T E R N A T I V E

Demonstrate3 that the proposed all-electric5 home:

is 20% more efficient than the 2016 State Energy Code

includes at least 2.5 kW of solar.

☐ P A S S I V E H O U S E

Develop the proposed home to Passive House Institute US

(PHIUS) Standards. PHIUS Rater

STEP 3: FOR ALL PROJECTS , ACHIEVE ELECTRIC VEHICLE (EV) READINESS REQUIREMENT

C O M P L I A N C E M E T H O D : R E Q U I R E M E N T : F I E L D V E R I F I E R :

1 [replace this text with your jurisdiction’s standards for what constitutes a new home/complete demolition. The County’s is

75%, but it varies across cities] 2 All new homes must comply with mandatory elements of Title 24, Part 6 (California Energy Code) 3 Energy savings demonstrated via Title 24 Energy Calculations (Registered Certificate of Compliance: CF1R-PRF) 4 HERS Verification requirements are summarized in Residential Appendix RA2, published by the California Energy

Commission. 5 Construction considered 'all-electric' if electricity is the only permanent source of energy for water-heating, space-heating,

space cooling, cooking and clothes-drying and there is no gas meter connection. 6 A mixed-fuel home is a home where both natural gas and/or propane and electricity are used.

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☐ D E D I C A T E D 2 0 8 / 2 4 0 -V O L T B R A N C H C I R C U I T

Comply with CALGreen Measure

A4.106.8.1

Verifier from

Step 1

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[JURISDICTION NAME] GREEN BUILDING CHECKLIST SINGLE FAMILY RESIDENTIAL: ADDITIONS & ALTERATIONS

STEP 1A (FOR PROJECT S <750 SQUARE FEET 1) ACHIEVE GREEN BUIL DING REQUIREMENT

C O M P L I A N C E M E T H O D : R E Q U I R E M E N T : V E R I F I E R :

☐ C A L G R E E N M A N D A T O R Y Submit CALGreen Mandatory Checklist Plan Check

STEP 1B (FOR PROJECT S ≥750 SQUARE FEET 1 ) ACHIEVE GREEN BUIL DING REQUIREMENT


V E R I F I E R : ☐ C A L G R E E N T I E R 1

CALGreen Tier 1, Less Section A4.2 (Energy

Efficiency) Qualified Building

Professional2 ☐G R E E N P O I N T R A T E D Achieve Certified Level3

☐ L E E D F O R H O M E S Achieve LEED for Homes Certified Level3

STEP 2: FOR ALL PROJECTS, ACHIEVE STATE ENERGY EFFICIENCY REQUIREMENTS C O M P L I A N C E M E T H O D : R E Q U I R E M E N T : F I E L D

V E R I F I E R : ☐ 2 0 1 6 S T A T E E N E R G Y C O D E

Meet the standards outlined for the project in the 2016

Building Energy Efficiency Standards

HERS Rater, where

verification is

required4

STEP 3: FOR PROJECTS THAT ARE MODIFYING THE MAIN E LECTRICAL SERVICE PA NEL, ACHIE VE ELECTRIC VEHICLE (EV) READINESS REQUIREMENT


V E R I F I E R : ☐ D E D I C A T E D 2 0 8 / 2 4 0 - V O L T B R A N C H C I R C U I T

Comply with CALGreen Measure A4.106.8.1 Verifier from

Step 1

While these local standards do not require applicants to exceed statewide energy efficiency

codes, please be aware of the mandatory requirements established by the state that may apply to

your project. Changes that may trigger additional requirements or HERS verification may

include, but are not limited to, the addition, alteration, or expansion of:

Fenestration, including windows, skylights, and doors with more than 3 square feet of

glass

Insulation

Ducts

1 Calculated by adding the remodeled square footage and square footage of conditioned additions. 2 A qualified building professional can be an architect, engineer, contractor, or qualified green building

professional. 3 Projects are not required to meet minimum category points established by Green Point Rated and LEED , only

the total points required to achieve certification level. 4 HERS Verification requirements are summarized in Residential Appendix RA2, published by the California

Energy Commission.

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New space heating and cooling, water heating, and ventilation systems

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[JURISDICTION NAME] GREEN BUILDING CHECKLIST MULTIFAMILY RESIDENTIAL: ADDITIONS & ALTERATIONS

STEP 1A (FOR PROJECTS <750 SQ . FEET 1) AC HIEVE GREEN BUIL DING REQUIREMENT


☐ C A L G R E E NM A N D A T O R Y Submit CALGreen Mandatory Checklist Plan Check

STEP 1B (FOR PROJECT S ≥750 SQ. FEET 1 ) SELECT ONE GREEN BUILDING REQUI REMENT


V E R I F I E R :☐ C A L G R E E NT I E R 1


Efficiency) Qualified Building

Professional2 ☐G R E E NP O I N T R A T E D Achieve Certified Level3

☐ L E E D F O RH O M E S Achieve LEED for Homes Certified Level3

STEP 2: FOR ALL PROJ ECTS, ACHIEVE STATE ENERGY EFFICIENCY RE QUIREMENTS C O M P L I A N C E M E T H O D : R E Q U I R E M E N T : F I E L D

V E R I F I E R :☐ 2 0 1 6 S T A T EE N E R G YC O D E



HERS Rater, where

verification is

required4

STEP 3: IF APPLICABLE, ACHIE VE ELECTRIC VEHICLE (EV) READINE SS REQUIREMENT C O M P L I A N C E M E T H O D : R E Q U I R E M E N T : F I E L D

V E R I F I E R :

☐ P R O J E C T SB U I L D I N G O RM O D I F Y I N G 5 O N -S I T E P A R K I N GS P A C E S

If more than 25% of the parking lot surface is

modified, add circuit to all parking spaces 6. Where

existing electrical service will not be upgraded in

the existing project scope, designate capacity for

EV Capable7 parking spaces to the maximum extent

that does not require an upgrade to existing

electrical service.

Verifier from

Step 1

☐ P R O J E C T SM O D I F Y I N G T H EE L E C T R I C A LS E R V I C E P A N E L

If the service panel is modified, add designated

electrical capacity for 20% of onsite parking spaces

to be EV Capable7.

1 Calculated by adding the remodeled square footage and square footage of additions. 2 A qualified building professional can be an architect, engineer, contractor, or qualified green building

professional. 3 Projects are not required to meet minimum category points established by Green Point Rated and LEED , only

the total points required to achieve certification level. 4 HERS Verification requirements are summarized in Residential Appendix RA2, published by the California

Energy Commission. 5 Modified parking lot shall be those for which paving material and curbing is removed 6 Circuit should be installed to specifications outlined for the project type in CALGreen 7 “EV Capable” refers to a parking space with conduit installed and allocated 208/240V 40 -amp panel capacity

for future EV charging stations.

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[JURISDICTION NAME] GREEN BUILDING CHECKLIST COMMERCIAL NEW CONSTRUCTION

STEP 1: FOR ALL PROJ ECTS, SELECT ONE GREEN BUILDING REQUI REMENT C O M P L I A N C E M E T H O D : R E Q U I R E M E N T : F I E L D

V E R I F I E R :☐ C A L G R E E NT I E R 1 CALGreen Tier 1

CALGreen

Inspector

☐ L E E D N E WC O N S T R U C T I ON

LEED Silver LEED AP

STEP 2: FOR ALL PROJECTS, SELECT ONE ENERGY EFFICIENCY ME THOD 1 C O M P L I A N C E M E T H O D : R E Q U I R E M E N T : F I E L D

V E R I F I E R :

☐ C A L G R E E NT I E R 1

Demonstrate2 that the energy use of the proposed

building is 10% more efficient than the 2016 State

Energy Code. HERS Rater, where

verification is

required3 ☐ A L L -E L E C T R I C Develop proposed building to be all-electric.4

STEP 3: FOR ALL PROJ ECTS, ACHIE VE ELECTRIC VEHICLE (EV) READINESS REQUI REMENT


V E R I F I E R :☐ > 1 0 O N - S I T EP A R K I N GS P A C E S

Build 10% of parking spaces to be EV Ready5

Build remaining6 parking spaces to be EV Capable7 Verifier from

Step 1 ☐ 2 - 1 0 O N - S I T EP A R K I N GS P A C E S

Build 2 parking spaces to be EV Ready5

Build remaining6 parking spaces to be EV Capable7

1 All new commercial buildings must comply with mandatory elements of Title 24, Part 6 (California Energy

Code) 2 Demonstrate energy savings via a Registered Certificate of Compliance ( PERF-1C) 3 HERS Verification requirements are summarized in Nonresidential Appendix A, published by the California

Energy Commission. 4 Construction is considered 'all-electric' if electricity is the only permanent source of energy for water -heating,

space-heating, space cooling, cooking and clothes-drying. 5 “EV Ready” refers to a parking space that has allocated 208/240V 40-amp panel capacity, conduit, wiring,

receptacle, and overprotection devices, with an endpoint near to the parking space. 6 The panelboard(s) shall have sufficient space to install 40 -ampere dedicated branch circuit and overcurrent

protective device per EV Space up to a minimum of 20% of the total number of EV Spaces. 7 “EV Capable” refers to a parking space with conduit insta lled and allocated 208/240V 40-amp panel capacity


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[JURISDICTION NAME] GREEN BUILDING CHECKLIST MULTIFAMILY RESIDENTIAL: NEW CONSTRUCTION

STE P 1: FOR AL L P ROJ E CTS , SE LE CT ONE G REE N BU I LD IN G RE QU I RE M ENT


V E R I F I E R :

☐ C A L G R E E N T I E R 1 Develop the proposed project to CALGreen

Tier 1

CALGreen

Inspector

☐G R E E N P O I N TR A T E D Achieve Silver Certification Level Green Point Rater

☐ L E E D F O R H O M E S Achieve LEED for Homes and Multifamily

Lowrise Silver LEED AP

STE P 2A (FO R PR OJE CT S 3 ST OR IE S O R L ESS) : SEL EC T ON E ENE R G Y E FF IC IEN C Y ME T H OD 1 C O M P L I A N C E M E T H O D : R E Q U I R E M E N T : F I E L D

V E R I F I E R :☐ P R O J E C TW I T H O U TS O L A R

If a photovoltaic system is not installed, demonstrate 2

that the energy use of the proposed home is 10% more

efficient than the 2016 State Energy Code. HERS Rater,

where verification

is required3 ☐ P R O J E C TW I T H S O L A R

If a photovoltaic system is installed, demonstrate 2 that

the energy use of the proposed home is 15% more

efficient than the 2016 State Energy Code.

☐ A L L -E L E C T R I C

Demonstrate that the proposed project will be all

electric4

STE P 2 B (F OR P RO JEC T S 4 S TO R I ES O R MO RE) : S EL EC T ON E ENE R G Y EFF IC IE NC Y ME T HOD 2


V E R I F I E R :

☐ C A L G R E E NT I E R 1

Demonstrate2 that the energy use of the proposed

building is 10% more efficient than the 2016 State

Energy Code.

HERS Rater, where

verification is

required3 ☐ A L L -E L E C T R I C Develop all units to be all-electric.4

STE P 3 : FO R A LL P RO J E CTS , AC H IE V E E LEC T RI C V E HI C LE (E V ) R EAD IN ESS RE QU I RE MEN T C O M P L I A N C E M E T H O D : R E Q U I R E M E N T : F I E L D

V E R I F I E R :☐ > 1 0 O N - S I T EP A R K I N GS P A C E S

Build 10% of parking spaces to be EV Ready5


Verifier from

Step 1

1 All new multifamily buildings must comply with mandatory parts of Title 24, Part 6 (California Energy Code) 2 Energy savings for multifamily projects 3 stories or less are demonstrated via a Registered Certificate of

Compliance (CF1R-PRF) 3 HERS Verification requirements are summarized in Residential Appendix RA2, published by the California

Energy Commission. 4 Construction considered 'all-electric' if electricity is the only permanent source of energy for water -heating,

space-heating, space cooling, cooking and clothes-drying. 5 “EV Ready” refers to a parking space that has allocated 208/240V 40-amp panel capacity, conduit, wiring,

receptacle, and overprotection devices, with an endpoint near to the parking space. 6 The panelboard(s) shall have sufficient space to install 40 -ampere dedicated branch circuit and overcurrent

protective device per EV Space up to a minimum of 20% of the total number of EV Spaces. 7 “EV Capable” refers to a parking space with conduit installed and allocated 208/240V 40 -amp panel capacity


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☐ 2 - 1 0 O N - S I T EP A R K I N GS P A C E S

Build 2 parking spaces to be EV Ready5


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[JURISDICTION NAME] GREEN BUILDING CHECKLIST COMMERCIAL ADDITIONS & ALTERATIONS

STEP 1A (FOR PROJECT S <3,000 SQ . FEET 1) SELECT ONE GREEN BUILDING REQUI REMENT


☐ C A L G R E E NM A N D A T O R Y Submit CALGreen Mandatory Checklist Plan Check

STEP 1B (FOR PROJECT S ≥3,000 SQ. FEET 1 ) S ELECT ONE GREEN BUILDING REQUI REMENT


V E R I F I E R :☐ C A L G R E E NT I E R 1


Efficiency) Qualified

Building

Professional2 ☐ L E E D N E WC O N S T R U C T I ON

LEED Silver3

STEP 2: FOR ALL PROJECTS, ACHIEVE EN ERGY EFFICIENCY REQU IREMENT C O M P L I A N C E M E T H O D : R E Q U I R E M E N T : F I E L D

V E R I F I E R :

☐ 2 0 1 6 S T A T EE N E R G Y C O D E



HERS Rater, where

verification is

required4

STEP 3: IF APPLICABLE , ACHIE VE ELECTRIC VEHICLE (EV) READINESS REQUI REMENT C O M P L I A N C E M E T H O D : R E Q U I R E M E N T : F I E L D

V E R I F I E R :☐ P R O J E C T SB U I L D I N G O RM O D I F Y I N G 5

O N - S I T EP A R K I N GS P A C E S

If more than 25% of the parking lot surface is modified,

add circuit to all parking spaces6. Where existing

electrical service will not be upgraded in the existing

project scope, designate capacity for EV Capable7

parking spaces to the maximum extent that does not

require an upgrade to existing electrical service. Verifier from

Step 1 ☐ P R O J E C T SM O D I F Y I N GT H EE L E C T R I C A LS E R V I C EP A N E L

If the service panel is modified, add designated

electrical capacity for 20% of onsite parking spaces to

be EV Capable7.

1 Calculated by adding the remodeled square footage and square footage of additions. 2 A qualified building professional can be an architect, engineer, contractor, or qualified green building

professional. 3 Projects are not required to meet minimum category points established by LEED , only the total points required

to achieve certification level.4 HERS Verification requirements are summarized in Nonresidential Appendix A, published by the California

Energy Commission. 5 Modified parking lot shall be those for which paving material and curbing is removed 6 Circuit should be installed to specifications outlined for the project type in CALGreen 7 “EV Capable” refers to a parking space with conduit installed and allocated 208/240V 40-amp panel capacity


16

2016 Energy Efficiency Ordinance Cost Effectiveness Study

Page 5 September, 2016

Table 2: Measure Descriptions & Cost Assumptions

Measure

Performance

Level

Incremental Cost

Source & Notes

Single

Family

MF – Per

Unit

QII Yes $519 $133

City of Palo Alto 2016 Reach Code Ordinance:

http://www.cityofpaloalto.org/civicax/filebank/documents/52054

ACH50 3.0 $379 n/a

NREL measure cost database ($0.115/ft2 for sealing) + HERS rater

verification ($100).

Wall

Insulation R-21 $164 n/a

2016 CASE Report: Residential High Performance Walls and QII,

2016-RES-ENV2-F

Cool Roof

Aged Reflect

= 0.20 $523 $131

$0-$0.50 / ft2 of roof area per local industry expert at LBNL. Used

average of $0.25/ft2.

Window U-

factor/ SHGC 0.30/0.23 $73 $20 EnerComp ($0.15/ft2 of window area)

Doors 0.20 U-factor $210 $140

NREL measure cost database ($3.50/ft2) for doors between house

and garage. Double cost ($7/ft2) for front door assuming a premium

product.

High

Performance

Attics (HPA)

R-15 under

roof deck $878 $219

For climate zones 1-3, & 5-7 only where HPA is not prescriptive.

2016 CASE Report: Residential Ducts in Conditioned Space / High

Performance Attics, 2016-RES-ENV1-F

Furnace 92% $389 $351 Local HVAC contractor, MF reduction for smaller capacity.

Air

Conditioning

15/12.5 $78 $46 Local HVAC contractor, MF reduction for smaller capacity.

16/13 $839 $699

Average of local HVAC contractor & NREL database costs. MF

reduction for smaller capacity.

Fan Efficacy 0.3 Watts/cfm $143 $104 Local HVAC contractor, MF reduction for smaller capacity.

Refrigerant

Charge

HERS

verified n/a $75 Local HERS rater.

Duct

Insulation R-8 $164 n/a

For climate zones 3, 6, & 7 where not prescriptive. 2016 CASE

Report: Residential Ducts in Conditioned Space / High Performance

Attics, 2016-RES-ENV1-F

Water heater

0.94 EF $0 $0 Internet pricing and plumbing contractor input. Minimal

incremental equip cost and lower cost to install PVC venting

(condensing) vs stainless venting (standard). Slight premium going

from 0.94 to 0.96. 0.96 EF $100 $100

Hot water pipe

insulation

HERS

verified $146 n/a

Roughly equivalent to code requirements effective Jan. 2017. 10%

of $3.87 per ft (2013 SF DHW CASE study) for additional labor to

pass HERS inspection. $100 for HERS verification per local HERS

raters.

Hot water

compact

distribution

HERS

verified n/a $112

Assume compact design already or easily achieved in MF units – no

added cost. $100 HERS verification fee per local HERS rater. Pipe

insulation cost per the pipe insulation measure assumptions.

PV

System size

varies

$3.53 /

kW DC

$3.21 /

kW DC

Avg. system cost for systems < 10kW (for the last 12 months) of

$5.29/Watt for single family (http://www.gosolarcalifornia.ca.gov/).

For multi-family systems, an average of the < 10 kW and > 10kW

system cost ($4.37/Watt) was used; systems are expected to be

typically greater than 10 kW, although not as large as some

commercial systems reported on in the database. In both cases cost

was reduced by $0.25/Watt for the NSHP incentive & 30% for the

solar investment tax credit.

Attachment 2

17

J-16.2

http://www.cityofpaloalto.org/civicax/filebank/documents/52054

http://www.gosolarcalifornia.ca.gov/



Evaluation results for the selected packages show that meeting the performance targets for both single

family and multifamily prototypes is feasible in most climate zones. In climates where it was not feasible,

targets were relaxed to an appropriate level. It is important to note that the packages contained in this

report are examples only; any project meeting requirements of a local ordinance, both single family and

multifamily, must independently evaluate and identify the most cost effective approach based on project-

specific factors.

Following are descriptions of each of the efficiency measures applied in this analysis.

Quality Insulation Installation (QII): HERS rater verification of insulation quality according to the

procedures outlined in the 2016 Reference Appendices RA3.5 (CEC, 2016c). QII is included in all cases

since it is a pre-requisite for all the voluntary tiers in 2016 CALGreen.

Reduced Infiltration (ACH50): HERS rater field verification and diagnostic testing of building air

leakage according to the procedures outlined in the 2016 Reference Appendices RA3.8 (CEC, 2016c).

The default infiltration assumption for single family homes is 5 air changes per hour at 50 Pascals

(ACH50)4 and the reduced level applied in this analysis is 3 ACH50. This measure was not applied to

multifamily homes because the modeling software does not allow this credit unless each unit is modeled

individually, which is not typical in the compliance process for multifamily buildings.

Window Performance: Reduce window U-value from the prescriptive value of 0.32 to 0.30 in all

climates and reduce the solar heat gain coefficient (SHGC) from the prescriptive value of 0.25 to 0.23 in

climate zone 2, 4, 6 through 16. In climate zones 1, 3, and 5 there is no prescriptive SHGC requirement

and the default value of 0.50 is left as is.

Door Performance: Install insulated doors that meet a U-value of 0.20 at the front entry and doors

between the house and garage. It’s assumed there is a single 3’ x 6’8” entry door per single family home

and multifamily unit as well as a second 3’ x 6’8” door to the garage per single family home.

Cool Roof: Install a roofing product that’s rated by the Cool Roof Rating Council to have an aged solar

reflectance of 0.20. This measure only applies to climates zones where this is not already required

prescriptively.

Exterior Wall Insulation: Increase wall cavity insulation from R-19 to R-21 in 2x6 walls.

High Performance Attics (HPA): For climates where HPA is not already prescriptive under the 2016

code (CZ 1-3, 5-7), increase attic ceiling insulation to R-38 and add insulation under the roof deck

between framing (R-13 for roof with air space, R-18 for roof without air space).

High Efficiency Furnace: Upgrade furnace to a condensing unit with an efficiency of 92% AFUE.

High Efficiency Air Conditioner: Upgrade air conditioner efficiency beyond federal efficiency

minimum to either SEER 15 / EER 12.5 or SEER 16 / EER 13.

High Efficacy Fan: Upgrade the fan in the furnace or air handler using an electronically commutated

motor (ECM) that meets an efficacy of 0.3 Watts / cfm or lower operating at full speed. Fan watt draw is

verified by a HERS rater according to the procedures outlined in the 2016 Reference Appendices RA3.3

(CEC, 2016c). New federal regulations that go into effect July 3, 2019 are expected to result in equivalent

performance for all newly manufactured furnaces provided that the ducts are sized properly.

4 Whole house leakage tested at a pressure difference of 50 Pascals between indoors and outdoors.

18



Refrigerant Charge Verification: HERS rater verification of proper air conditioner refrigerant charge

according to the procedures outlined in the 2016 Reference Appendices RA3.2 (CEC, 2016c). This

measure only applies to climates zones where this is not already required prescriptively.

R-8 Duct Insulation: Increase duct insulation to R-8. This measure only applies to climates zones where

R-8 ducts are not already required prescriptively.

High Efficiency Water Heater: Upgrade tankless water heater to a condensing unit with a rated Energy

Factor (EF) of either 0.94 or 0.96.

Hot Water Pipe Insulation: Beginning in January 1, 2017 the 2016 California Plumbing Code will

require pipe insulation levels that are close to that required if taking the Title-24 pipe insulation credit.

This credit will be obsolete under the 2016 energy code, however, the HERS-Verified Pipe Insulation

Credit, as defined in the 2016 Reference Appendices RA3.6.3 (CEC, 2016c), will remain. While CBECC-

Res has not yet been updated to reflect this, for this analysis it was assumed that the revised HERS

verified credit would be equivalent to the current credit for pipe insulation without HERS verification.

This was determined based on simulations that demonstrated the HERS credit to be valued at roughly

twice that for pipe insulation without verification in terms of TDV energy. This credit was only applied to

single family residences. For costing purposes, 120 linear feet of 1/2in insulated pipe is assumed to be

insulated.

Hot Water Compact Distribution: HERS rater verification of compact distribution system requirements

according to the procedures outlined in the 2016 Reference Appendices RA3.6.5 (CEC, 2016c). This

measure was applied to multifamily buildings only. Many multifamily buildings with individual water

heaters are expected to easily meet this credit with little or no alteration to plumbing design. This measure

also requires verification of pipe insulation per the HERS-Verified Pipe Insulation Credit. Assumption is

60 linear feet per dwelling unit of 1/2in insulated pipe.

PV Compliance Credit: To be eligible for this compliance credit a PV system with a minimum capacity

of 2 kW DC per single family home with no more than 2,000 ft2 of conditioned floor area and 1 kW DC

per multifamily unit with no more than 1,000 ft2 of conditioned floor area is required. For the single

family 2,430 ft2 prototype the minimum capacity as calculated by CBECC-Res is 2.0 kW to 2.4 kW

depending on the climate zone. The multifamily apartment units in the prototype are all under 1,000 ft2

and therefore require a 1 kW system. The credit was developed to give builders an option with which to

trade-off High Performance Attics and Walls, and to begin preparing for ZNE requirements.

Table 2 below summarizes the measures evaluated along with cost assumptions.

19

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