2013 Title 24 Standards - City of Chula Vista | Home

Title 24: Where We're Headed with the 2013 Standards

Featuring:

Martyn C. Dodd

EnergySoft, LLC

www.energysoft.com

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Learning Objectives

Understand the major areas of change in the 2013 Title 24 Building Energy Efficiency Standards including:

Overall changes in scope and application

Envelope Requirements

Mechanical Requirements

Indoor Lighting Requirements

Outdoor Lighting Requirements

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2013 Title 24 Standards

Overall Changes in Scope and Application

Welcome

Overall Changes in Scope and Application ● When and Why? ● Additional Scope of Coverage ● New Registration Procedures ● Performance Modeling

Low-rise Residential Envelope Nonresidential Envelope Low-rise Residential Mechanical Nonresidential Mechanical Residential Lighting Nonresidential Indoor Lighting Nonresidential Outdoor Lighting

Update Schedule

May 31, 2012 Business Meeting – Language Adoption

Jul 1, 2014 Implementation Date

Any projects that apply for permit on or after Jul 1, 2014 will be subject to the 2013 Standards.

Information and Documents available at:

http://www.energy.ca.gov/title24/2013standards/

2013 Title 24 Standards 4

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Revised Standards

All Standards subchapters are now renumbered

Using a decimal system

Section 150 becomes 150.0

Section 151 becomes 150.1

All other conventions stay the same.


Computer Rooms

Section 140.9(a)

Prescriptive Requirements for Computer Rooms

(Exceeds 20 w/sqft of load)

Integrated economizers required for each cooling fan system, to meet 100% of expected load at OA temperature of 55F

Exception under 5 ton units assuming no other system has an economizer

Controls that prevent reheating, recooling or simultaneous heating and cooling

Non-adiabatic humidification (steam, infrared) is prohibited


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Computer Rooms

Section 140.9(a) (cont)

The total fan power at design conditions of each fan system shall not exceed 27 W/kBtuh of net sensible cooling capacity

Two-speed or variable speed control on fans with motor demand limitations

Air barriers for containment –to prevent discharge air from recirculating


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Commercial Kitchens

Section 140.9(b)

Prescriptive Requirements for Commercial Kitchens

Reduce short-circuiting of kitchen exhaust hoods –replacement air limited to 10% of hood exhaust airflow rate

Maximum exhaust flow rate requirements


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Commercial Kitchens

Section 140.9(b) (cont)

Kitchens with Type I + Type II exhaust hoods > 5,000 cfm shall have one of the following:

At least 50% of replacement air is transfer air

Demand ventilation controls on >= 75% of exhaust air system

Energy recovery devices with recovery effectiveness >= 40% on at least 50% of total exhaust airflow

75% or more of makeup air volume is unheated or uncooled

Kitchen exhaust system acceptance testing


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Laboratories

Section 140.9(c)

Prescriptive Requirements for Laboratory Exhaust Systems

For laboratory circulation rates <= 10 air changes per hour

Zone exhaust and makeup airflow rates shall be capable of reducing to regulated minimum circulation rates or rate necessary to maintain pressurization, whichever is larger


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Refrigerated Warehouses

Section 120.6(a)

Some increases in insulation requirements

Some changes to mechanical requirements

Added Infiltration Barrier requirement

Air Curtain

Closing Door


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Commercial Refrigeration

Section 120.6(b)

Retail food stores > 8,000 square feet of conditioned area

Have refrigerated display cases

or

Have walk-in coolers or freezers connected to remote compressor units or condensing units

Condenser requirements

Compressor requirements

Display case lighting control requirements

Refrigeration heat recovery requirements


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Parking Garages

Section 120.6(c)

Mechanical ventilation systems for enclosed parking garages where the total design exhaust rate for the garage is > 10,000 cfm

Automatically detect contaminant levels and stage fans or modulate fan airflow rates to 50% or less of design capacity provided acceptable contaminant levels are maintained.

Have controls and/or devices that will result in fan motor demand of no more than 30 percent of design wattage at 50% of design airflow.

One CO sensor per 5,000 sq ft.


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Parking Garages

Parking Garage Controls (cont)

CO concentration at all sensors is maintained ≤ 25 parts per million (ppm) at all times.

The ventilation rate shall be at least 0.15 cfm/sq ft when the garage is scheduled to be occupied.

The system shall maintain the garage at negative or neutral pressure relative to other occupiable spaces when the garage is scheduled to be occupied.

EXCEPTION to Section 120.6(c): Any garage, or portion of a garage, where more than 20% of the vehicles expected to be stored have non gasoline combustion engines.


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Process Boilers

Section 120.6(d)

Boiler, or group of boilers served by a common exhaust stack with a combined heat input capacity of > 2,500,000 Btu/h

Equipped with a combustion air positive shut-off. (flue damper or a vent damper)

Boiler with combustion air fan motors rated at 10+ horsepower

Variable speed drive or equivalent

Boiler with input capacity > 5,000,000 Btu/h

Maintain excess (stack-gas) oxygen concentrations <= 5%

Boiler with input capacity > 10,000,000 Btu/h

Maintain excess (stack gas) oxygen concentrations <= 3% 2013 Title 24 Standards 15

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Compressed Air

New compressed air systems, and all additions or alterations of compressed air systems where the total combined compressor power is > 25 hp

The compressed air system shall be equipped with an appropriate sized trim compressor and primary storage to provide acceptable performance across the range of a system and to avoid control gaps.

Compressed air systems with more than one compressor, having a combined horsepower rating > 100 hp, must operate with an approved controller that is able to choose the most energy efficient combination of compressors within the system based on the current air demand as measured by a sensor.


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Design Review

All nonresidential, hotel/motel & highrise residential

Requires a Design Review Kickoff Certificate(s) of Compliance and

Construction Document Design Review Checklist Certificate(s) of Compliance

Completed and signed by a licensed professional engineer (PE) or contractor performing work


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Design Review

Buildings less than 10,000 sq ft may be the engineer of record.

Buildings greater than 10,000 sq ft but less than 50,000 sq ft, shall be a qualified in-house engineer with no other project involvement or a third party engineer

Buildings greater than 50,000 sq ft and all buildings with complex mechanical systems, the licensed professional engineer shall be a third party.


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Design Review


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Commissioning


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All nonresidential buildings > 10,000 sq ft

Owner’s or owner representative’s project requirements

Basis of design

Design phase design review

Commissioning measures shown in the construction documents

Commissioning plan

Functional performance testing

Documentation and training

Commissioning report

Electrical Power Distribution

Section 130.5(a)

Minimum requirement for metering of electrical load


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Metering Requirements

Meter Type Services

<= 50kVA

50 kVA <

Services

<= 250kVa

250 kVA <

Services

<= 1000 kVa

Services

> 1000 kVa

Instantaneous (at the time) kW demand Req Req Req Req

Historical peak demand (kW) Req Req

Resettable kWh Req Req Req Req

kWh per rate period Req

Electrical Power Distribution

Section 130.5(b)

Minimum requirement for separation of electrical load


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Load Type Services <=

50kVA

50 kVA <

Services

<= 250kVa

250 kVA <

Services

<= 1000 kVa

Services

> 1000 kVa

Lighting A D D

HVAC Systems A D D

Domestic Hot Water A A A Plug Loads A A D Elevators & Escalators A A A Appliances 25 kVa or higher A D D

Load Centers 25 kVa or higher A D D

Renewable Power Source Each Group Each Group Each Group Each Group

Renewable Loads A A A

Charging Stations A A A A

A: Aggregated load D: All loads disaggregated (see standard for details)

Section 130.5(d)

In all buildings, both controlled and uncontrolled 120 volt receptacles shall be provided in:

Private offices

Open office areas

Reception lobbies

Conference rooms

Kitchenette in office spaces

Copy rooms

Circuit Controls for 120-Volt Receptacles


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Updated Weather

New weather data used in performance

Uses NREL dataset from 2009

Data based upon historical average

New “reference cities”

Zone 6 - Torrance

Zone 8 – Fullerton

Zone 14 – Palmdale

Zone 15 – Palm Springs

Zone 16 – Blue Canyon

Climate zone boundaries have changed


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Solar Zones

Nonresidential Buildings 3 stories or less

High-rise Res & Hotel/Motel buildings 10 stories or less

Minimum 15% of roof area

Exceptions are given in Section 110.10 for locating solar zone

elsewhere


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Solar Zone

Roof oriented between 110 degrees and 270 degrees or flat roof

No roof obstructions

Designed for weight of solar panels

The area may be divided into 80 sqft or more sections, no dimension < 5 feet

Nonresidential Mechanical

Welcome Overall Changes in Scope and Application Low-rise Residential Envelope Nonresidential Envelope Low-rise Residential Mechanical

Nonresidential Mechanical ● Equipment ● Economizers ● Fans ● Controls

Residential Lighting Nonresidential Indoor Lighting Nonresidential Outdoor Lighting

HVAC

New efficiencies for DX equipment

Implementation on Jan 1, 2015

Equipment < 65,000 Btuh 14 SEER

Equipment >= 65,000 Btuh < 240,000 Btuh 11.7 EER


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Chillers

Chilled water plants shall not have more than 300 tons provided by air cooled chillers

Slight modification to original rule

Prescriptive limitation


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Economizers

Mandatory Fault Detection and Diagnostics (FDD)

All air-cooled unitary direct-expansion units with an economizer and

Mechanical cooling capacity >= 54,000 Btuh

Must include a Fault Detection and Diagnostics (FDD) system

Includes

Packaged DX rooftops

Split-systems

Heat pumps

Variable refrigerant flow systems


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Economizers

Prescriptive threshold for economizers lowered

Moved from 75,000 Btuh down to 54,000 Btuh (4.5 tons)

Removed exemptions related to computer equipment and telecommunications


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Economizers

DX systems with economizers must be able to stage or modulate cooling capacity as follows:


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Cooling Capacity Staging or Modulation

Fan Type Stages Required Cooling Capacity Effective Date

Constant Volume 2 >= 75,000 Btuh Jan 1, 2014

Constant Volume 2 > =65,000 Btuh Jan 1, 2016

Variable Volume 3 or 4 > =65,000 Btuh Jan 1, 2014

Fans

Each system listed in Table 140.4-B shall be designed to vary the airflow rate as a function of actual load.


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Variable Airflow Control of Fans

Cooling System Type Fan Motor Size Cooling Capacity Effective Date

Direct Expansion any >= 75,000 Btuh Jan 1, 2014

Direct Expansion any > =65,000 Btuh Jan 1, 2016

Chilled Water & Evap > 1 hp any Jan 1, 2014

Chilled Water & Evap > ¼ hp any Jan 1, 2016

Fans

Single zone systems shall have controls and/or devices that will result in fan motor demand of no more than 40 percent of design wattage at 66 percent of design fan speed

Two-speed fan or variable speed drive

Multiple zone systems shall include controls that limit the fan motor demand to no more than 30 percent of the total design wattage at 50 percent of design air volume when static pressure set point equals 1/3 of the total design static pressure

Variable speed drive 2013 Title 24 Standards 33

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Controls

Occupancy sensors allowed as a control option for demand control ventilation

May reduce the ventilation rate to zero

One sensor per room

Must do one hour pre-purge prior to normal occupancy

Requires fan cycle control sequence to maintain the average outdoor air rate over a 2 hr. period

Must shut off outside air within 30 minutes of vacancy

If single zone system, must also cycle off the fan


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Controls

Mandatory Occupancy sensor based HVAC control in:

Multipurpose rooms less than 1000 sqft

Classrooms greater than 750 sqft

Conference rooms greater than 750 sqft

Must automatically setup the cooling set point by 2°F or more and setback the heating temperature set point by 2˚F or more

AND

Automatically reset the minimum required ventilation rate to zero or turn the supply fan off when the zone is unoccupied


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Hotel/Motel Guest Rooms

Hotel and motel guest rooms shall have captive card key controls, occupancy sensing controls, or automatic controls.

Activated no longer than 30 minutes after the guest room has been vacated

Setpoints are:

Set-up at least 5°F in cooling mode

Set-down at least 5°F in heating mode

Lighting is switched off

At least one-half of the 120-volt switched

EXCEPTION: One high efficacy luminaire as defined in TABLE 150.0-A or 150.0-B that is switched separately and where the switch is located within 6 feet of the entry door.


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Nonresidential Indoor Lighting

Welcome Overall Changes in Scope and Application Low-rise Residential Envelope Nonresidential Envelope Low-rise Residential Mechanical Nonresidential Mechanical Residential Lighting Nonresidential Indoor Lighting

● Mandatory Measures ● Power Adjustment Factors ● Complete Building Method ● Area Category Method ● Tailored Method

Nonresidential Outdoor Lighting

Multi-level Controls

Section 130.1(b)

Multi-level controls required in areas > 0.5 w/sqft and >= 100 sqft

Each luminaire shall be controlled by at least of one of the following methods:

Manual dimming

Lumen maintenance

Tuning

Automatic daylighting controls

Demand responsive lighting controls


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Multi-level Controls

Exceptions to Section 130.1(b)

Classrooms, with a connected general lighting load of 0.7 watts per square feet and less

Can have at one control step between 30-70 percent of full rated power.

An area enclosed by ceiling height partitions that has only one luminaire with no more than two lamps.


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Lumen Maintenance will maintain constant light output as lamp ages. Tuning is the ability to set maximum light levels at a lower level than full power.

Occupant Sensors

Occupant sensors to reduce power by 50%

Aisles and open areas in warehouses

Must control that particular aisle

40% power reduction if LPD is less than 80% of Area Category allowance

Library book stack aisles

10 feet or longer that are accessible from only one end

20 feet or longer that are accessible from both ends

Lighting installed in corridors and stairwells


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Occupant Sensors

Section 130.1(c)7B

Stairwells and common area corridors which provide access to guestrooms and dwelling units of high-rise residential buildings and hotel/motels

Parking garages, parking areas and loading and unloading areas.

At least one control step between 20 percent and 50 percent

No more than 500 watts together.


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Skylit Zone Definition

0.7 times ceiling height in each direction from the edge of the rough opening of the skylight


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Primary Sidelit Zone Definition

One window head height deep into the area

Includes window width plus 0.5 times window head height wide on each side of the rough opening of the window


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Automatic Daylighting Controls

Section 130.1(d)2

Required in skylit zones

Required in primary sidelit zones

Zones documented on plans

Luminaires in each type of zone must be controlled separately

Photosensors are not readily accessible to unauthorized personnel

Must be a Multi-Level control


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Exceptions:

Less than 120 watts of lighting

Less than 24 sqft of glazing

Automatic Daylighting Controls


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Parking Garage Daylighting

Section 130.1(d)3

Automatic daylighting controls required

Parking garage area with combined total of 36 square feet or more of glazing or opening

Daylit zones shall be shown on the plans.

Photosensors are not readily accessible to unauthorized personnel

Controls shall be multi-level, continuous dimming or ON/OFF.

Shut lights off when illuminance levels greater than 150 percent of the lighting illuminance level. 2013 Title 24 Standards 46

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Exception: Less than 60 watts of lighting in the perimeter zone

Demand Responsive Lighting Controls

Section 130.1(e)

Applies to all buildings larger than 10,000 sqft.

Demand responsive controls and equipment shall be capable of receiving and automatically responding to at least one standards based messaging protocol which enables demand response after receiving a demand response signal.


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Must automatically provide either:

A 15% reduction in lighting power via dimming; or

A reduction in lighting by one level below full ON in accordance with Table 130.1-A via stepped dimming or stepped switching

Spaces that are non-habitable shall not be used to comply with this requirement.

Spaces with a lighting power density of less than 0.5 watts per square foot shall not be counted toward the building’s total lighting power.

Table 130.1-A shown on next slide


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Control Credits – Called PAFs

Table 140.6-A Lighting Power Adjustment Factors (PAFs)

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Secondary Daylight Zones

Prescriptive compliance

Secondary daylight zone

120 watts or more of lighting in secondary area

Automatic daylighting controls required


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Complete Building Method

Reduction in LPDs for Offices and Parking Garages


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Area Category Method

Reduced LPDs for Offices, Grocery, Retail & Parking

New category for Videoconferencing


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Area Category Method

New footnotes for additional allowances

Applies to Tasks, Ornamental, etc


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Alterations

Screw base adapters are not recognized, even if permanent

Luminaires and luminaire housings manufactured with incandescent screw base sockets shall be classified only as incandescent. Field modifications, including hard wiring of an LED module, shall not be recognized

Replacement of lamps in a luminaire manufactured or rated for use with linear fluorescent lamps, with linear lamps of a different technology such as linear LED lamps, shall not be recognized.


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Alterations

Lighting System Alterations shall include alterations where an existing lighting system is modified, luminaires are replaced, or luminaires are disconnected from the circuit, removed and reinstalled, whether in the same location or installed elsewhere.

Subject to Table 141.0-E

Exception: Alterations that qualify as a Luminaire Modification-in-Place (definition to follow)


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Alterations


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130.1(a) = Area Control 130.1(d) = Daylighting Control 130.1(b) = Multi-level Control 130.1(e) = Demand Response Control 130.1(c) = Automatic Shut Off Control 130.0(d) = Mfg. Instructions

Alterations

To qualify as a Luminaire Modification-in-Place, lighting systems shall be modified in only one or more of the following methods:

Replacing lamps and/or ballasts.

Changing the number or type of light source in a luminaire including socket renewal, removal or relocation of sockets.

Changing the optical system of a luminaire.

Installing lighting control systems devices.

Replacement of whole luminaires one for one in which the only electrical modification involves disconnecting the existing luminaire and reconnecting the replacement luminaire.


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Alterations


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130.1(a) = Area Control 130.1(d) = Daylighting Control 130.1(b) = Multi-level Control 130.1(e) = Demand Response Control 130.1(c) = Automatic Shut Off Control 130.0(d) = Mfg. Instructions

Nonresidential Outdoor Lighting

Welcome Overall Changes in Scope and Application Low-rise Residential Envelope Nonresidential Envelope Low-rise Residential Mechanical Nonresidential Mechanical Residential Lighting Nonresidential Indoor Lighting Nonresidential Outdoor Lighting

● General ● Hardscape Lighting Power ● Specific Applications Lighting Power ● Ordinance Tables ● Signs

Motion Sensors

All luminaires with mounting heights less than 24’ above the ground

Motion sensor required

Reduce lighting power of each luminaire by at least 40 percent but not exceeding 80 percent

OR

Provide continuous dimming

Shall employ auto-on functionality

Maximum of 1,500 watts of lighting power shall be controlled together


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Motion Sensors

Exceptions to motion sensors

Sales Frontage

Sales Lots

Sales Canopies

Building Facades

Ornamental Hardscape

Dining

Pole-mounted luminaires <= 75 watts

Non-pole mounted luminaires <= 30 watts

Linear lighting <= 4 watts per linear foot of luminaire


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Hardscape Lighting Power

Table 140.7-A

Hardscape Allowances

Reductions in Lighting Allowances (shown in red)


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Type of Power Allowance Lighting

Zone 1

Lighting

Zone 2

Lighting

Zone 3

Lighting

Zone 4

Area Wattage Allowance (AWA) 0.035 W/ft² 0.045 W/ft² 0.090 W/ft² 0.115 W/ft²

Linear Wattage Allowance (LWA) 0.25 W/lf 0.45 W/lf 0.60 W/lf 0.85 W/lf

Initial Wattage Allowance (IWA) 340 W 510 W 770 W 1030 W

Specific Applications Lighting Power

Reductions in Lighting Allowances (shown in red)


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Lighting Application Lighting Zone 1 Lighting Zone 2 Lighting Zone 3 Lighting Zone 4

Building Entrances or Exits. Allowance per door. Luminaires qualifying for this allowance shall be within 20 ft of the door.

30 W 60 W 90 W 90 W

Vehicle Service Station Canopies

Allowance for the total area within the drip line of the canopy. Luminaires qualifying for this allowance shall be located under the canopy.

0.514 W/ft² 1.005 W/ft² 1.300 W/ft² 2.200 W/ft²

Outdoor Dining. Allowance for the total illuminated hardscape of outdoor dining. Outdoor dining areas are hardscape areas used to serve and consume food and beverages. Qualifying luminaires shall be within 2 mounting heights of the hardscape area of outdoor dining.

0.014 W/ft² 0.135 W/ft² 0.240 W/ft² 0.400 W/ft²

Questions?

This concludes the Title 24 Standards Training.

Please be sure to complete your evaluation sheets so we can plan future events.

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