2019 Building Energy Efficiency Standards 2019-09-25 · • LED lighting will save ~ 480 (74%) GWh in the first year • Combined efficiency will save ~ 650 GWh for all buildings

2019 Building Energy Efficiency Standards

Presented by Scott Blunk

Strategic Business Planner – Electrification and Energy Efficiency

Green Technology - AIA Provider G515 & ICC Preferred Provider 1170

Scott Blunk is the Strategic Business Planner of Electrification and Energy Efficiency at the Sacramento Municipal Utility District. He is a mechanical engineer, general contractor, real estate broker as well as a BPI Super Proctor and LEED AP. He heads SMUD’s long range planning for electrification and energy efficiency. Scott received his Bachelor of Science in Mechanical Engineering from Purdue University and his Master’s in Business Administration from Marquette University.

(916) 826-9369

[email protected]

Continuing Education• AIA: Green Technology is an AIA provider (number G515). Both seminars are approved.

CalGreen offers 2 HSW (Health, Safety & Welfare) units. Energy Code is 3 Learning Units. You attendance will be directly reported and a Certificates of Attendance will be emailed.

• ICC: Green Technology is a Preferred Provider (number 1170). Both Seminars are approved. CALGreen is 0.2 CEUs & Energy Code is 0.3 CEUs. Self-reporting is required.

• LEED: Green Technology is not a provider; however credit can be taken by self-reporting using the certificate of attendance. It is likely that CALGreen will be 2 CEUs & Energy Code will be 3 CEUs.

• Build It Green: They do not have a “provider” or endorse any one organization however; For their members to renew their Build It Green membership and certifications, they must fulfill a CEU requirement. One way they can do so is to attend any learning event (like a webinar, class, meeting, etc.) that pertains to green building practices. One hour counts as one CEU. Self-reporting is required.

• CMAA: They do not have a “provider” or endorse any one organization however; their program is with Renewal Points and one hour counts as one RP. Self-reporting is required.

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Certificate Of Completion

Everyone attending today’s workshop will receive a certificate of completion, by e-mail, from Green Technology for 3 hours of continuing education credit.

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Course Description• This 3 hour (3 CEUs) course/seminar will cover changes to Title 24, part 6 for

both residential and non-residential buildings.

• The session will also review challenges that have resulted in implementing the 2016 standards, strategies for addressing them, and solutions to these challenges that may be included in the recent revisions.

• With each cycle, California's Energy Code is moving closer toward the goal of ZNE for all new construction.

• Mandates for efficiency in existing buildings are expanding.

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Learning Objectives• Understand where the code emanates and the factors driving its change

• Understand how the changes to the 2019 Energy Code and be able to pinpoint the most poignant code sections for residential and non residential

• Understand the most practical ways of meeting, and exceeding, the Title 24, part 6, requirements

• Understand what is driving future code changes and how to prepare

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Energy Code - The Beginning

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How it all Started

• Warren-Alquist Act 1975• Established the CEC

• What was happening in 1975• Watergate (1974)• 10% inflation• OPEC – gas shortages• 55 mph imposed to save gas• Global recession• Vietnam War ended

Rosenfeld Curve

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Rosenfeld Curve: Per Capita Electricity Consumption in California and the U.S.

1975 - Today

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2019 Standards Goals – Path to the Future1. Increase building energy efficiency cost effectively

2. Contribute to the State’s GHG reduction goals

3. Substantially reduce the home’s impact on the grid through efficiency and PV

4. Promote grid harmonization and self-utilization of PV generation

5. Provide independent compliance paths for both mixed-fuel and all-electric homes

6. Provide tools for Part 11 Reach Codes and other beyond code practices

The 2019 Standards strategy will accomplish all of these goals listed above

Source: California Energy Commission

ZNE Strategy: the IEPR VisionA decade ago when the ZNE goal was first set it was a simple idea: All newly constructed residential buildings by the year 2020 must be ZNE as defined by the IEPR (Integrated Energy Policy Report): improve building efficiency, deploy PVs, and:

“…the value of the net amount of energy electricity produced by on-site renewable energy resources is equal to the value of the energy electricityconsumed annually by the a mixed fuel building, at the level of a single “project” …. using the California Energy Commission’s Time Dependent Valuation metric.”

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12

0 Net Site Energy

0Net

Energy Emission

s

0Net TDV Energy

0Net

Energy Costs

0Net

Source Energy

California ZNE

Definition

Produce as much energy as the home uses on an annual (net) basis

• Gas vs. Electric?

• Site vs. Source?

• Cost of energy?

• Peak energy reduction?

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Oversupply and ramping: A challenge as more renewables are integrated into the grid

Typical Spring Day

Net Load 11,663 MW on May 15, 2016

Actual 3-hour ramp 10,892 MW on

February 1, 2016

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CAISO Public

Solutions

Target energy efficiency

Increase storage and demand responseEnable economic dispatch of renewablesDecarbonize transportation fuels

Retrofit existing power plants

Align time-of-use rates with system conditionsDiversify resource portfolio

Deepen regional coordination

Bad Duck

Source:CaliforniaEnergyCommission

Good Duck

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The Invisible House - PV Plus Basic Battery – A “Mild” Summer Day

Temporal netting assumes all hours of the day have the same emission and energy cost values, not a correct assumption - Blue line smooths out the belly of the duck and achieves zero carbon and zero energy without resorting to netting

Source: California Energy Commission

Energy Code - The Carbon Future

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1. Switching to a CO2 emission metric; the new metric must support these policy goals at the same time:

i. GHG emissions reduction (instead of ZNE goals)ii. Supporting demand responsive and grid

harmonization signals§ Getting away from annual netting and focusing

on hourly netting for emissions and energy

2. Focusing on high-rise residential – 4 stories and higher, and hotel/motel

3. Selected nonresidential buildings – Retail, office, warehouse

What is in Store for 2022 Standards?

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Current Energy/ Emission Goals17

AB 32 Global Warming Solution Act of 2006

• Reduction of greenhouse gas (GHG) emissions to 1990 levels by 2020 (AB32) – achieved in 2016

• 40% below by 2030 (SB32)• 80% below by 2050

• 0 Carbon (net) by 2045 (Executive Order B-55-18, 2018)

• Facilitated by the California Air Resources Board (CARB)

Current Energy/ Emission Goals

• 40% GHG reduction by 2030

SB 32 (2016)

• Electric sector:• 60% renewable

/ 2030• 100% carbon-

free / 2045SB 100 (2018)

• Carbon neutrality by 2045

Gov. Exec Order (2018)

• 40% GHG reductions in buildings / 2030 (assessment)

AB 3232

• $200M incentives for low-emissions buildings and equipment

SB 1477

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Gas combustion in buildings > all in-state power plants

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Source: www.arb.ca.gov/cc/inventory/data/data.htm, 2018

• Gascombustioninbuildings(12%)>allin-statepowerplants(10%)

• Notincludingbuildingemissionsfromelectricityandfugitivemethane

Building Energy Use

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2019 Code Built Home: CAZ12, 2700 sfMixed Fuel All-Electric

60% Reduction in

Carbon Pollution21

The 2019 Code

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Residential

• 2019 Code is ~ 7% more efficient than 2016 • 2016 ~ 28% more efficient than the 2013 Standards• 2013 ~ 30% more efficient

Nonresidential

• 2019 Code is ~ 30% more efficient than 2016• LED lighting will save ~ 480 (74%) GWh in the first year• Combined efficiency will save ~ 650 GWh for all buildings

• 2016 ~ 5% more efficient than the 2013 Standards

The standards take effect on January 1, 2020

2019 Building Energy Efficiency Standards

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Energy and CO2 Savings

Residential–SingleFamilyHomes• Average30-yearcostof$9,500andSavingsof$19,000• Monthlymortgageincreaseof$45andenergybillreductionof$80• Energysavingsof7%withoutPVsand53%ofentirehousewithPVs

PercentSavingsBetween2005and2019StandardsCycles

StatewideAverage

ResidentialEnergySavings ResidentialCO2eReduction

68% 52%

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What is “The Code”

2019 Building Energy Efficiency Standards for Residential and Nonresidential Buildings

• The Standards contain:• energy efficiency requirements• water efficiency requirements • indoor air quality requirements

…for newly constructed buildings, additions to existing buildings, and alterations to existing buildings

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“The Code”

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Most Useful Table in the Standards

• Table 100.0-A

“The Code”

2019 Building Energy Efficiency Standards for Residential and Nonresidential Buildings

• Establishes performance standards in the form of an “energy budget”

• Prescriptive option• Performance option

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“The Code”2019 Building Energy Efficiency Standards for Residential and Nonresidential Buildings

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Prescriptive§ Simple§ Meet a prescribed

minimum efficiency§ Little design flexibility § Easy to use§ Typically used for

alterations

Performance• More complicated• Offers considerable design flexibility• Requires an approved computer software program

• models a proposed building• determines its allowed energy budget• calculates its energy use

“The Code”

2019 Building Energy Efficiency Standards for Residential

and Nonresidential Buildings

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Mandatory (minimum) Measures• Both prescriptive or performance compliance paths require mandatory

(minimum) measures that… set mandatory minimum levels. • Examples of Mandatory Measures:

• infiltration control • lighting• minimum insulation levels • minimum equipment efficiency

“The Code”

2019 Reference Appendices

• Provides CEC approved default values for items such as

• Technical Specifications• R-value of plywood

• Fan motor efficiency

• Etc.

• Weather / Climate Data

• HERS Verification, Testing, and Documentation Procedures

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“The Code”

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• 2019 Residential Compliance Manual and Documents

• 2019 Nonresidential Compliance Manual and Documents

“The Code”

• The compliance manuals are intended to help plans examiners, inspectors, owners, designers, builders, and energy consultants comply with and enforce California’s 2019 Building Energy Efficiency Standards (Energy Standards)

• The manual is written as a reference and an instructional guide and can be helpful for anyone that is directly or indirectly involved in the design and construction of energy-efficient buildings.

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“The Code”2019 Alternative Calculation Method Reference Manual

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Some Basics

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Definition of TDV

• TDV is a flexible tool with values that vary: • By type utility (electricity vs. natural gas vs. propane) • By location – reflecting differences in costs driven by climate conditions • By type of construction – residential vs. nonresidential

• TDV vs. Site Energy• Site Energy usage is what shows up on your bill in $, kWh, or Therms• TDV is meant to be the real cost of energy

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2016 vs. 2019

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2019 Code Changes

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Energy Design Rating (EDR)• ENERGY DESIGN RATING, ENERGY EFFICIENCY

• EDR based on the TDV energy consumption of a building that results from the building’s energy efficiency characteristics

• ENERGY DESIGN RATING, SOLAR ELECTRIC GENERATION AND DEMAND FLEXIBILITY

• EDR reduction based on TDV that results from the combination of the building’s solar electric generation system and demand flexibility measures

• ENERGY DESIGN RATING, TOTAL

• EDRtot = EDREE – EDR(PV+Flex)

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Energy Design Rating (EDR)

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Energy Design Rating (EDR)

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• The average required PV size is 2.8 KW. The table shows the PV sizes for a 2,700 sf house in different climate zones

• By comparison, the average existing home PV installation is 7.2 kW

• PV sizes vary with house size and climate zone

Battery Storage§ 110.1 BATTERY SYSTEM, STATIONARY STORAGE

A rechargeable energy storage system consisting of electrochemical storage batteries, battery chargers, controls, and associated electrical equipment designed to provide electrical power to a building. The system is typically used to provide standby or emergency power, and uninterruptable power supply, load shedding, load sharing or similar capabilities.

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Joint Appendix 12

JA12- Qualification Requirements for Battery Storage System:

Turns the battery into a dynamic device that when coupled with a PV system brings maximum benefits to the environment, grid and the occupants

Three Control Strategies:

1. Basic – Charge when generation greater than load, discharge when loads greater than generation

2. TOU – Hold off discharge until the onset of highest TOU period

3. Advanced Demand Response – Charge/discharge in response to DR signal

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PV - Lessons LearnedReality is nuanced – in the intervening code years, new developments have had a significant impact on the ZNE approach, including:

• Large utility scale (60% RPS requirements) and buildings based PV deployment

• Net energy metering (NEM) rules and Time-Of-Use (TOU) compensation for residential customer-owned generation

• The current NEM rules treat the grid as “virtual storage” (or a bank), where the over generated kWhs can be “stored” and used later in the day, or another season

ZNE was a goal, NEM and life cycle costing are laws and we must operate within their confines.

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Grid HarmonizationGrid harmonization strategies (GHS) when coupled with customer owned PV systems bring maximum benefits to the grid, environment, and occupants

Grid Harmonization Strategies Defined:

Measures that harmonize customer owned distributed energy resources with the grid to maximize self-utilization of PV output, and limit grid exports to periods beneficial to the grid and the ratepayer

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PV Cost Effectiveness

All Standards measures, including efficiency and renewables, must be cost effective using life cycle costing (LCC)

• Must comply with net energy metering (NEM) sizing rules – Offset the annual kWh of the building, overgeneration compensated at wholesale ~ 3 cents/kWh

• PVs are sized to displace annual electricity consumption is found to be cost effective in all 16 climate zones

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§150.1(c)14 – Photovoltaic Requirements• Add new prescription requirement for low-rise residential buildings to have

a photovoltaic system.

• System output shall equal the dwelling’s annual electrical usage and meets the requirements of JA11

• Exception for limited solar ready zones less than 80 contiguous SF due to natural or manmade barriers

• Reduced PV requirement for Climate Zone 15

• Reduced PV requirement for 2 story single and multifamily homes

• Reduced PV requirement for 3 story multifamily and 3 or more stories single family homes

• Reduced PV size if installed in conjunction with a battery storage system

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Photovoltaic Requirements

Options for PV Compliance:

The building Standards allow different options for high performance walls and attics, similarly, there will be several different options for meeting the PV requirements:

• Rooftop installationü Outright purchase – larger initial investment by home owner, larger monthly savings

ü Lease and PPA options – little or no initial investment, smaller monthly savings

• Community Solar – An alternative to rooftop PV

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Community Shared Solar/Renewables

Community Solar (CS) - Section 10-115 – Include shared PV and Battery Storage systems

Homes can instead be served by Commission approved community solar projects that provide equivalent benefits to the homes as onsite PV systems.

1. CS resources may include other shared renewables like wind and geothermal

2. Energy Performance – As if it is a rooftop PV systems

3. Energy savings dedicated to building for 20 years NOT occupants

4. Cost Savings – Cannot cost the occupants more than non-participants

5. Durability – Dedicated to the building for at least 20 years, like rooftop PVs

6. Additionality – CS resources must exclusively serve the building and not other buildings or purposes

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§150.0(k) – Residential Lighting


• Removed redundancy, clarified phrasing

• Added “lighting internal to drawers, cabinetry or closets” to Table 150.0-A

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Mandatory Features and Devices



• Added step lights and path lights to the Section for night lights

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Air-Distribution and Ventilation System Ducts, Plenums, and Fans.§150.0(m)12A – Air Filtration• Require air filtration for forced air

systems:• Ducted mechanical space conditioning

systems• Supply ventilation systems• The supply side of balanced ventilation

systems

• Exception for evaporative coolers

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Air-Distribution and Ventilation System Ducts, Plenums, and Fans.§150.0(m)12B – Air Filtration Requirements – Design and Installation

Air filter sizing compliance options for space conditioning systems:

• Two-inch minimum depth filter, or

• One-inch depth filter if:• The filter face area is sized to allow maximum 150 ft/min face velocity,

and• Filters installed meet a maximum clean filter maximum pressure drop in

150.0(m)12Dii (0.1 inch water)

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Air-Distribution and Ventilation System Ducts, Plenums, and Fans.§150.0(m)12C – Air Filtration Efficiency

• Increase minimum air filter particle size efficiency from MERV 6 to MERV 13

§150.0(m)12D–Air Filtration Pressure Drop

• For space conditioning systems:• 2-inch depth filter: allowable pressure drop determined by the system designer.

• 1-inch depth filter: pressure drop maximum 0.1 inches water at the design airflow rate.

• For ventilation systems:• Filter pressure drop determined by the system designer

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Air-Distribution and Ventilation System Ducts, Plenums, and Fans.§150.0(m)13A, B, C, D – Residential HVAC Furnace Fan Efficacy

• Revise the maximum fan efficacy requirement in Sections 150.0(m)13 and 150.1(c)10.

• Add requirement for ≤ 0.45 W/cfm for gas furnace air-handling units (existing requirement was ≤ 0.58 W/cfm).

• 0.58 W/cfm for air-handling units that are not gas furnaces

• Add requirements for small duct high velocity cooling systems:• ≥ 250 cfm/ton

• ≤ 0.62 W/cfm

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Requirements for Ventilation and Indoor Air Quality§150.0(o)1 –Amendments to ASHRAE 62.2

• Single Family Dwelling Units §150.0(o)1C• Windows are not a permissible method of providing ventilation

airflow

• The required ventilation rate will be based on a default dwelling unit enclosure leakage of 2 ACH50 for the infiltration credit

• Otherwise if HERS verified enclosure leakage values are less than 2ACH50, the HERS verified value will be used for calculating the required dwelling unit ventilation rate

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Requirements for Ventilation and Indoor Air Quality§150.0(o)1 –Amendments to ASHRAE 62.2 Multifamily Dwelling Units §150.0(o)1E

• The required ventilation rate will use ASHRAE 62.2 Section 4.1.1and comply with one of 2 alternatives:

• Use a balanced ventilation system, or

• If HERS verified enclosure leakage is ≤ 0.3 cfm per sq ft of enclosure area (blower door test), then the dwelling may use:

• Continuously operating exhaust-only ventilation systems, or

• Continuously operating supply-only ventilation systems.

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Requirements for Ventilation and Indoor Air Quality§150.0(o)1 – Amendments to ASHRAE 62.2

Multifamily Building Central Ventilation Systems that serve multiple dwelling units §150.0(o)1F

• Ventilation airflow rates to each dwelling unit served shall be balanced to be:

• Greater than or equal to ASHRAE 62.2 dwelling unit ventilation airflow rate, and

• Not more than 20% greater than the ASHRAE 62.2 dwelling unit ventilation airflow rate.

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Requirements for Ventilation and Indoor Air Quality§150.0(o)2 – Field Verification of Ventilation Systems

• Kitchen Range hoods §150.0(o)2B

• HERS verification to confirm the installed range hood is rated by HVI to meet:• The minimum ventilation airflow rate specified in Section 5 of ASHRAE 62.2 (100 cfm).• The maximum sound rating specified in section 7.2.2 of ASHRAE 62.2 (3 sone at

airflow greater than or equal to 100 cfm).

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§150.0(n) – Water Heating Systems

Systems using gas or propane water heaters to serve individual units shall include the following:

• A dedicated 125 volt, 20 amp receptacle connected to the panel with a 120/240 volt 3 conductor, 10 AWG branch circuit, within 3 ft of the water heater and accessible to the water heater with no obstructions, and

• Both ends of the conductor must be labeled “spare” and be electrically isolated

• A reserved single pole circuit breaker in the panel labeled “Future 240V Use”

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SUBCHAPTER 8LOW-RISE RESIDENTIAL BUILDINGS -PERFORMANCE AND PRESCRIPTIVE

COMPLIANCE APPROACHES

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Performance And Prescriptive ComplianceApproaches for Low-Rise Residential Buildings§150.1(c)1A – Roof and Ceiling Insulation Prescriptive Compliance

• Removed the above deck insulation option

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Prescriptive Compliance Approach


Option B: Below Deck Roof Insulation

• Ceiling Insulation

• Below Deck Roof Insulation

• Radiant Barrier

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Climate Zone 1 2 3 4 5-7 8-16Ceiling Insulation R-38 R-38 R-30 R-38 R-30 R-38Insulation Between Roof Rafters NR NR NR R 19 NR R 19Radiant Barrier NR REQ REQ NR REQ NR


Option C: Ducts in Conditioned Space

• Ceiling Insulation

• Ducts in Conditioned Space

• Radiant Barrier

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Climate Zone 1 2-10 11-15 16Ceiling Insulation R-38 R-30 R-38 R-38Radiant Barrier NR REQ REQ NR

In a plenum (box or scissor truss) Dropped ceiling soffit

Open-Web floor truss in two story homes

Option C: Ducts in Conditioned Space

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Design Option: Sealed Attic

Basic Design:• Ducts and air handler remain in

the attic• Unvented (sealed) Attic• R-30 or R-38 roof deck assembly

• Variety of insulation types and assemblies can be used or combined:

• Spray foam below deck• Netted / wired batt or blown-in

below deck• SIPs or half SIPs• Insulated roof tiles

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Design Option: No Ducts69

System types:§ Mini-splits§ Hydronic§ Packaged terminal heat pump

Benefits:§ Eliminates duct losses§ Higher system efficiency§ No need for HPA, UVA or DCS efforts

Challenges:§ Modeled benefit is conservative relative to

other measures*

*This will change over time with improved knowledge of benefits.

2019 Major Changes - ResidentialWood Framed Walls2013 Code: Residential Package A Prescriptive Standard§ Assembly U-Factor of 0.065 (R-15.4) in all climate zones

2016 Code: Residential Prescriptive Standard§ Assembly U-Factor of 0.051 (R-19.6)

§ except CZ 6 & 7

2019 Code: Residential Prescriptive Standard§ Assembly U-Factor of 0.048 (R-20.8)

§ except CZ 6 & 7

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High Performance Wall Design Options71

Code: Assembly U-Factor of 0.048

**Multiple combinations of similar materials will achieve these same U-factors

U-factor Framing Stud Spacing

Cavity Insulation

Exterior Insulation Cavity Insulation Type

0.048 2x6 24” OC R-19 R-6 (1") Low density fiberglass batt

0.048 2x6 16” OC R-21 R-5 (1") High density batt or BIB

0.046 2x6 16” OC R-19 R-7 (1.25") Low density fiberglass batt

0.045 2x4 16” OC R-15 R-10 (2.5") High density batt

Performance And Prescriptive ComplianceApproaches for Low-Rise Residential Buildings§150.1(c)1E – Quality Insulation Installation (QII) Prescriptive Compliance

• Added requirement for QII to the prescriptive package for all Climate Zones

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Performance And Prescriptive ComplianceApproaches for Low-Rise Residential Buildings§150.1(c)3A – Fenestration

• Changed threshold for glazed doors to follow NFRC• Exception: 3 sq. ft. of glazing in doors and tubular skylights with dual-pane

diffusers

§150.1(c)5 – Doors

• Added requirement for doors to the prescriptive package (U 0.20, R-5)• Applicable to all Climate Zones

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Performance And Prescriptive ComplianceApproaches for Low-Rise Residential Buildings• TABLE 150.1-A – COMPONENT PACKAGE – Single Family Standard Building

Design

• Reduced the fenestration U-factor requirement to 0.30 in all CZs

• Reduced the fenestration SHGC requirement to 0.23 in CZs 2, 4, & 6-15

• Changed the fenestration SHGC requirement to ‘NR’ for CZ 16

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Performance And Prescriptive ComplianceApproaches for Low-Rise Residential Buildings§150.1(b)–Performance Standards

§150.1(b)3B – Field Verification

• Add references for new field verification protocols in Residential Appendix Section RA3.3

• HSPF Rating - Section RA3.4.4.1

• Heat Pump Rated Heating Capacity – Section RA 3.4.4.2• Whole House Fan – Section RA3.9

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Performance And Prescriptive ComplianceApproaches for Low-Rise Residential Buildings§150.1(c)8A–Domestic Water-Heating Systems serving individual dwelling units

• Delete option ii for gas storage type water heater under 55 gallons• This option is superseded with QII being a prescriptive requirement for 2019.

• Additional Drain Water Heat Recovery option for gas storage type water heater above 55 gallons

• Currently requires either compact hot water distribution or HERS verified pipe insulation.

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Performance And Prescriptive ComplianceApproaches for Low-Rise Residential Buildings

§150.1(c)8B–Domestic Water-Heating Systems serving multiple dwelling units

• Add new prescription option for reduced solar fraction requirement if a Drain Water Heat Recovery (DWHR) system are installed

• Current requirements are solar fraction 0f 0.2 in CZ 1 through 9 and 0.35 in CZ 10 through 16

• With a DHWR system, the solar fraction requirement reduced to 0.15 in CZ 1 through 9 and 0.3 in CZ 10 through 16

• The DHWR system must have at least a CSA rated effectiveness of 42 percent and recover heat from at least half of the showers above the first floor

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Performance And Prescriptive ComplianceApproaches for Low-Rise Residential Buildings§150.1(c)8A–Domestic Water-Heating Systems serving individual dwelling units

• Add new prescriptive option iii for heat pump water heaters• Require additional kW larger than the prescriptive PV requirement

• For CZ 2 through 15, additional capacity of 0.3 kW

• For CZ 1 and 16, additional capacity of 1.1 kW

• Alternatively, installation of DWHR and Compact Distribution

• Add new prescriptive option iv. Require installation of heat pump water heater that meets NEEA Advanced Water Heater Specification Tier 3 or higher.

• For CZ 1 and 16, additional capacity of 0.3 kW required in addition to a NEEA Tier 3 HPWH

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ENERGY EFFICIENCY STANDARDS FORADDITIONS AND ALTERATIONS TO EXISTINGLOW-RISE RESIDENTIAL BUILDINGS

§150.2(b)1H – Domestic Water-Heating Systems Alteration

• Add new prescriptive alteration option for heat pump water heaters• Require additional photovoltaic system capacity of 1kW

• Add new prescriptive alteration option heat pump water heater that meets NEEA Advanced Water Heater Specification Tier 3 or higher.

• Will meet prescriptive alteration requirement for CZ 1 through 15

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Nonresidential Code80

2019 Code Changes

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Nonresidential

• Update indoor and outdoor lighting maximizing the use of LED technology

• High efficient air filters

• Demand response controls

• Lighting controls

SUBCHAPTER 2ALL OCCUPANCIES—MANDATORY REQUIREMENTS

FOR THE MANUFACTURE, CONSTRUCTION ANDINSTALLATION OF SYSTEMS, EQUIPMENT AND

BUILDING COMPONENTS

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Changes to Mandatory Requirements

• § 110.3 – Public lavatories temp control limit from 110°F to 120°F• Aligns with Plumbing Code

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Changes to Mandatory Requirements

§ 110.6(a)2,3,4 Mandatory Requirements for Fenestration Products and Exterior Doors

• Reduce allowable square footage from 1,000 sf to 200 sf for site-built fenestration to use default values

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Mandatory Requirements for Lighting Controls

§ 110.9 (b)1 All Lighting Controls

• Time-Switch Controls – Power Interrupted Capabilities• Shall prevent the loss of the device’s schedule for at least 7 days and

• Shall prevent the loss of the device’s date and time for 72 hour

• Provide an automatic holiday shutoff feature that turns off all connected loads for at least 24 hours

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Mandatory Requirements for Lighting Controls

§ 110.9 (b)4 Occupant Sensing Controls

• Automatic off controls set for 20 minutes

• Manual-on controls to have a grace period between 15 and 30 seconds

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Changes to Mandatory Requirements• § 110.5 – Pilot Lights Prohibited

• Added requirement to prohibit pilot lights for indoor and outdoor fireplaces

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Natural Gas / Electrification

§ 110.1 NATURAL GAS AVAILABILITY• For newly constructed buildings, natural gas is available if a gas

service line can be connected to the site without a gas main extension. For addition and alteration, natural gas is available if a gas service line is connected to the existing building.

There is nothing natural about natural gas (methane)

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Changes to Mandatory RequirementsDemand Response§110.12(a) Demand Responsive Controls

• OpenADR 2.0 or

• Certified by the manufacturer as being capable of responding to a demand response signal

• Thermostats must comply with Reference Joint Appendix 5 (JA5)

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Mandatory Requirements for Demand Response§110.12(b) Demand Responsive Controls

• Demand Response Zonal HVAC Controls• HVAC Systems with DDC to the Zone level shall be programmed to allow

centralized demand shed for non-critical zones• Must have the capability to increase or decrease the operating cooling

temperature by 4 degrees in non-critical zones

• Lighting controls in buildings > 10,000 sf shall be capable of reducing lighting power in response to a Demand Response Signal

• Lighting power reduction in controlled spaces by a minimum of 15%

• Demand Response Electronic Messaging Center Controls• If > 15 kW, shall reduce lighting power by a minimum of 30%

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SUBCHAPTER 3NONRESIDENTIAL, HIGH-RISE RESIDENTIAL,

HOTEL/MOTEL OCCUPANCIES, AND COVERED PROCESSES—MANDATORY

REQUIREMENTS

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Requirements for Ventilation and Indoor Air Quality

§ 120.1(b) – High-Rise Residential Buildings

• In most cases ventilation will increase

• Require air filtration for:• Ducted mechanical space conditioning systems.• Supply ventilation systems.

• The supply side of balanced ventilation systems

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Ventilation and Indoor Air Quality§ 120.1(b) – High-Rise Residential Buildings

• Air filter sizing compliance options for space conditioning systems:

• Two-inch minimum depth filter, or• Allow use of one-inch depth filter if:

• The filter face area is sized to allow maximum 150 ft/min face velocity, and

• Filters installed meet a maximum clean filter maximum pressure drop in 120.1(b)1Dii (0.1 inch water)

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• All dwelling units shall be ventilated in accordance with ASHRAE 62.2

• Amendments to ASHRAE 62.2:• Window operation is not permissible for providing “wholebuilding ventilation

airflow”

• Central Fan integrated ventilation is not permissible

• Assumed infiltration credit at 2 ACH50

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• The required ventilation rate will use ASHRAE 62.2 Section 4.1.1 and comply with one of 2 alternatives:

• Use a balanced ventilation system, otherwise

• If HERS verified enclosure leakage is ≤ 0.3 cfm per ft2 of enclosure area (blower door test), then the dwelling may use:

• Continuously operating exhaust-only ventilation systems, or• Continuously operating supply-only ventilation systems.

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• Multifamily Building Central Ventilation Systems that serve multiple dwelling units

• Ventilation airflow rates to each dwelling unit served shall be balanced to:• Greater than or equal to ASHRAE 62.2 dwelling unit ventilation airflow rate, and

• Not more than 20% greater than the ASHRAE 62.2 dwelling unit ventilation airflow rate.

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Kitchen Range hoods

• HERS verification to confirm the installed range hood is rated by HVI to meet:• The minimum ventilation airflow rate specified in Section 5 of ASHRAE 62.2 (100 cfm).• The maximum sound rating specified in section 7.2.2 of ASHRAE 62.2 (3 sone at

airflow greater than or equal to 100 cfm).

• Airflow Performance

• Acceptance testing for unit ventilation airflow

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Ventilation and Indoor Air Quality§ 120.1(c) – NONRESIDENTIAL, HOTEL/MOTEL

• Outdoor Air Treatment• MERV 13

• At least 2 inch depth

• Natural Ventilation• Alignment with ASHRAE 62.1 Natural Ventilation Procedure

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Controls for Space-Conditioning Systems§ 120.2(e)3 – OCCUPANT SENSING ZONE CONTROLS Nonresidential/ high-rise residential/ hotel/ motel

Occupied standby (for specific spaces) > 5 min

• Occupancy sensor present for lighting controls; and

• Table 120.1-A identified space as eligible;

During occupied standby

• Cooling/heating set points reset by 2°F or 0.5°F if DDC

• Zone ventilation reduced to zero while within active set points

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Controls for Space-Conditioning Systems§ 120.2(i) – ECONOMIZER FAULT DETECTION AND DIAGNOSTICS (FDD)

Economizer Fault Detection and Diagnostics (FDD)

• Expanded to apply to all cooling systems greater than 4.5 tons of cooling capacity what also include an air economizer

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Shift in Refrigerants / Refrigerants

• First wave of refrigerant phase outs in the 1990’s• High Ozone Depleting Potential (ODP) refrigerants have been phased

out• HFC’s were phased into the market

• Since then HFCs have dominated refrigerant markets• Now the focus is on finding low Global Warming Potential (GWP)

refrigerants• New class of refrigerants are known as “natural” refrigerants

• CO2, Ammonia, Hydrocarbons (Isobutane & Propane), Hydrofluoro-olefins

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Covered Processes§ 120.6(a) – MANDATORY REQUIREMENTS FOR REFRIGERATED WAREHOUSES

Added requirements for adiabatic (hybrid) condensers:

• Setting the stage to phase out HFCs

• Hybrid condensers run “dry” as air-cooled condensers when cold outside

• New design saturated condensing drybulb temperatures (dry mode):• 20°F for freezers

• 30°F for coolers

• Condenser fan control

• Minimum condensing temperature ≤ 70°F

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§ 120.6(b) – MANDATORY REQUIREMENTS FOR COMMERCIAL REFRIGERATION

Added requirements for adiabatic (hybrid) condensers:

• Condensing temperature reset using variable setpoint control logic

• Minimum Condenser efficiency while operating in drymode:• 45 Btuh/W for systems using halocarbon refrigerants

• Exception to the 45 Btu/W for CO2 refrigerants

• Reminder: All condenser fans must be continuously variable speed

• Reminder: Floating head pressure (variable-setpoint control logic) is also required for all condensers

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SUBCHAPTER 4NONRESIDENTIAL, HIGH-RISE RESIDENTIAL, ANDHOTEL/MOTEL OCCUPANCIES—MANDATORYREQUIREMENTS FOR LIGHTING SYSTEMS AND

EQUIPMENT, AND ELECTRICAL POWERDISTRIBUTION SYSTEMS

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Lighting Systems And Equipment, And ElectricalPower Distribution System - General

Luminaire wattage determination:

• §130.0(c)2B Recessed Luminaires with medium screw base sockets wattage – the rated wattage of the installed JA8 lamps

• §130.0(c)4 Inseparable Solid State Lighting (SSL) luminaires wattage – the maximum rated input wattage

• §130.0(c)5 LED tape lighting and other linear lighting that do not require a housing wattage – the maximum rated input wattage

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Lighting Systems And Equipment, And ElectricalPower Distribution System - General(continued)

§130.0(c)6 Addition or Relocation of Luminaires (no wiring changes)

Luminaire wattage determination for modular lighting systems:

• 30W per foot of track lighting, or the wattage of all luminaires, or

• The rating of the track lighting current limiter or supplementary overcurrent protection panel, or

• For other modular lighting system, the rated wattage of the driver, power supply, or transformer.

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MANDATORY INDOOR LIGHTING CONTROLS§130.1(d) Automatic Daylighting Controls

• Clarify Skylit daylit zone for atrium spaces include:• Floor area directly under the atrium

• Top floor area directly adjacent to the atrium

• Clarify sidelit daylit zone requirements for very large overhangs

• Sections Related to Daylighting & Controls: §140.3(d); 140.6(a)2L

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Outdoor Lighting Controls and Equipment§ 130.2(b) Outdoor Luminaire Cutoff requirements

• Revised the threshold from wattage based to lumen output based

• Outdoor lighting greater than 6,200 initial lumen output shall comply with Title 24, Part 11 (CA Green Building Code) for Backlight, Uplight and Glare (BUG) requirements.

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Outdoor Lighting Controls and Equipment§130.2(c)2 Automatic Scheduling Controls

• Reduced outdoor lighting power by 50% - 90% during unoccupied periods and also capable of turning off the lighting by using automatic scheduling controls, or motion sensing controls

§130.2(c)3 Motion Sensing Controls

• Outdoor luminaires mounted 24 feet or less above grade (not for building facades lighting, outdoor dining lighting, others).

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SUBCHAPTER 5NONRESIDENTIAL, HIGH-RISE RESIDENTIAL, ANDHOTEL/MOTEL OCCUPANCIES—PERFORMANCEAND PRESCRIPTIVE COMPLIANCE APPROACHES

FOR ACHIEVING ENERGY EFFICIENCY

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Performance and Prescriptive Compliance Approaches

Prescriptive Requirements For SpaceConditioning Systems§140.4(h)5 – Cooling Tower Efficiency

Open-circuit cooling towers serving condenser water loops of 900 gpm or greater:

• Minimum efficiency of 60 gpm/hp (was 40 gpm/hp)

• EXCEPTION: replacement of building mounted towers

• EXCEPTION: towers serving buildings in Climate Zone 1 and 16.

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Prescriptive Compliance Approaches

§140.5 – Prescriptive Requirements For ServiceWater Heating SystemsAdd exception for High-Rise Residential and Hotel/Motel Occupancies

• Buildings of eight stories and higher are not required to comply with the solar fraction requirement for solar hot water heating.

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§140.6 Prescriptive Requirements For IndoorLighting Power AllowanceRevised the allowed lighting power density values using LED lighting as the baseline

• Updated the types of buildings and areas under all three approaches

• For an area not defined in Table 140.6-C, allowed a reasonably equivalent type to be chosen for the area and LPD value (§ 140.6(c)2.A)

• Added luminaire lighting power adjustment for small aperture tunable-white and dim-to-warm LED luminaires (§ 140.6(a)4C)

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Table 140.6-B

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Scott Blunk(916) [email protected]

Questions?

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