Post on 11-Sep-2021
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Codes and Standards Initiative ‐ Sponsors
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Who is Mass Save®?
Mass Save® is an initiative sponsored by Massachusetts’ gas and electric utilities and energy efficiency service providers, including Columbia Gas of Massachusetts, The Berkshire Gas Company, Cape Light Compact, Eversource Energy, National Grid, Liberty Utilities, and Unitil. The Sponsors of Mass Save work closely with the Massachusetts Department of Energy Resources to provide a wide range of services, incentives, trainings, and information promoting energy efficiency that help residents and businesses manage energy use and related costs.
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Residential New Construction Offers
Low-Rise New Construction• Performance Path – based upon a % improvement over
the MA baseline• Prescriptive Path – incentives for measures beyond MA
baseline High-Rise New Construction
• Incentives based upon actual measures
Please visit www.MassSave.com for the details on all available incentives.
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Commercial New Construction Offers
Incentives for efficiency levels beyond code:• Whole building incentives• System incentives including
• Air Compressors• Chillers• Lighting and Lighting Controls• Gas-Fired Heating Equipment• Variable Speed Drives• Custom Measures• And more
We also offer incentives and rebates for existing buildings as well. Please visit www.MassSave.com for the details.
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Massachusetts Energy Code Technical Support Initiative Commercial Energy Code –Lighting, Lighting Control & Electrical Provisions
These materials © 2014 Conservation Services Group, Inc. all rights reserved. - Unauthorized access or use is strictly prohibited.
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AIA Continuing Education
CLEAResult is a Registered Provider with The American Institute of Architects Continuing Education Systems. Credit earned on completion of this program will be reported to CES Records for AIA members. Certificates of Completion for non-AIA members are available on request.
This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.
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Disclosure
These trainings are being offered through the support of Mass Save® and in cooperation with the Massachusetts Board of Building Regulations and Standards (BBRS). The Energy Code Technical Support staff, consisting of CLEAResult and other contractors, are not code officials, and the information provided through the program is not a formal interpretation of the code. Your local building code official is responsible for the enforcement of the code and the Massachusetts BBRS is the governing body responsible for interpretations of the code.
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Mass Save®
Energy Code Technical Support
Project Specific Code Assistance MA code officials Design professionals Contractors Sub contractors Material suppliers
Toll-free energy code support855-757-9717
Phone assistanceOffice visits
Project site visits
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Learning Objectives
To become familiar with the electric and lighting provisions of the 2012 Massachusetts Energy Conservation Code
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Agenda
Introductions Scope and Application Interior Lighting Power Density Lighting Controls
Exterior Lighting Lighting Power Density Lighting Controls
Additional Efficiency Packages Compliance
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Energy Savings
0%
15%
30%
45%
2006 2009 2012 2015
35 –40%
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Code Reference Materials
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Scope and Application
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Commercial Compliance
Commercial Compliance
Prescriptive
IECC
Scope and application
Envelope HVAC Lighting
Interior Exterior Controls
Service Water
HeatingAlternative
Options
ASHRAE
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R101.4.6 - Mixed Occupancy
If both residential and commercial uses are present, each occupancy shall be separately considered and meet the applicable IECC provisions Residential = 2012 IECC Residential Commercial = 2012 IECC Commercial
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2012 IECC versus 2010 ASHRAE 90.1
Higher (less stringent) lighting power density
Lighting controls required for different spaces
Manual controls allowed for daylight zones
No parking garage lighting controls
No room geometry adjustment allowed
Bi-level switching required
Lower (more stringent) lighting power density
Lighting controls required for different spaces
Multilevel lighting controls always required for daylight zones
Parking garage lighting controls
Room geometry adjustment allowed for spaces
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Additional Efficiency Package Options
Buildings following the prescriptive path shall comply with at least one of the following:
1. Efficient HVAC Performance – Minimum Efficiency Requirements for Mechanical Equipment – Tables C406.2 (1-7)
2. Efficient Lighting Systems – Reduced LPD per Table C406.33. On-Site Renewable Energy Systems – Provide for 1.75 Btu or 0.50
Watts per ft2 of Conditioned Floor Area4. For onsite use of biomass fuel, provided not less than 65 percent of
the energy used within the building for space and service water heating using sealed combustion mechanical equipment rated at a minimum of 85 AFUE. The biomass shall meet the eligible fuel and emission criteria under M.C.L. c. 25A. § 11 F (Massachusetts renewable energy portfolio standard).
C406.1 NEW!
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Commercial Compliance Methods
IECC 2012 & Massachusetts Amendments Prescriptive Checklists Software Based Compliance; COMcheck
ASHRAE 90.1 Compliance Building Performance Methodology: “Energy Cost Budget
Method” (Section11)
C102.1.1 Compliance with a code official approved “above code” program/performance protocol
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Stretch Code –Commercial Compliance
Stretch Code Performance
Option
Stretch Code Prescriptive Option
Base Code
New Construction(0- 4,999 sq. ft)
Not Subject to Stretch Code 2012 IECC plus MA amendments
New Construction(5,000-100,000 sq ft)
20% below 90.1-2007 Section 501.1.4 Prescriptive Path
Not available
New Construction (above 100,000 sq ft)
20% below 90.1-2007 Not available Not available
Supermarket, Labs Warehouse(<40,000 sq ft)
Not Subject to Stretch Code 2012 IECC plus MA amendments
Supermarket, Labs Warehouse(>39,999 sq ft)
20% below 90.1-2007 Not available Not available
Additions (>30% new floor area added to buildings
>100,000 sq ft)
20% below 90.1-2007 Not available Not available
Alterations and Repairs Not Subject to Stretch Code 2012 IECC plus MA amendments
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Definitions: “Residential & Commercial Buildings”
Residential Buildings: Detached One and Two-
Family Dwellings Townhouses Residential Buildings 3 Stories
or Less in Height
Commercial Buildings: All Buildings not Defined as
“Residential” Commercial Industrial Residential 4 Stories or
More in Height
Source: Shutterstock
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Additions
Additions alone shall comply with the code (additions include any building systems added)
Or; the entire building including the addition shall comply
Exemption Storm windows installed over existing fenestrations
C101.4.3
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Alterations, Renovations & Repairs
Alterations, Renovations & Repairs Must conform “As they relate to new construction” Renovated, or altered components, portions, and
systems must comply Repairs that relate to new construction
Exceptions Unaltered portions of an existing building or
building system Replacing less than 50% of the light fixtures in a
space Replacing the lamps and ballasts in existing light
fixtures without increasing energy use
C101.4.3
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Change in Occupancy or Use
If change in occupancy or use results in increased demand for fossil fuels or electricity, the space must comply with codeWhere the use in a space changes from one use in Table C405.5.2(1) or (2) to another use in Table C405.5.2(1) of (2), the installed lighting wattage shall comply with Section C405.5
>
C101.4.4
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Change in Space Conditioning
Unconditioned space that is converted to conditioned space must comply with code; including lighting
>
C101.4.5
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Low Energy Buildings
Exempt from building envelope provisions: Buildings with a design
rate of energy usage less than 3.4 Btu/h (or 1.0 watt) per ft2 for space heating Buildings that contain no
conditioned spaceNo commercial buildings are exempt from lighting and service water heating provisions
C102.1
Source: bridgelux
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Alternate Materials & Methods
“The Energy Conservation Code does not intend to prevent the use of alternate material and methods provided such materials and methods have been approved by code officials as meeting the intent of the code.”
C102.1
Source: Hotel Galéria Spirit
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Building Electrical and Lighting Provisions
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Lighting System Impact
Energy for Lighting in C&I Buildings• Accounts for Approximately 30% of Energy Use in
Commercial Buildings
Heating, Cooling
Non-Regulated
Lighting
Hot Water
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Lighting System Scope
Applies to the design of: • First installed lighting systems• Altered or repaired systems that
replace 50% or more of the luminaires
• Alterations that increase the lighting power density in the space
Exempt: Lighting within dwelling units provided 75% or More of the Hard-Wired Fixtures use High Efficacy Lamps (Fluorescent or LED)
Source: Mark A Steele Photography Inc.
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Intent of Lighting Requirements
Reduce hours of operation with lighting control requirements: Automatic Manual
Reduce lighting power density: 2012 Requirements are
more strict & include exterior lighting
Incorporate DaylightingCredit: Energy Resource Solutions
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Interior Lighting Power
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IECC 2012 –Lighting Mandates
For lighting alterations/retrofits <50%: only the altered lighting needs to be brought up to code.However, IF this change does not increase the lighting power, THEN there is no need to bring anything up to code.
When >50% or more of the luminaires in a space are replaced, that entire space or building must meet IECC 2012 code LPD requirements.
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Interior Lighting Power
Lighting power allowance (LPA) – Maximum allowed lighting power density (LPD)
LPD – Lighting Total Watts/Ft2 of Area Two paths: Building Area Space-by-Space
Fixture Rated Wattage X Qty ÷ Area (Ft2)
C405.5
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Example Area & Space Types
Table - Interior Lighting Power Allowance Tables
BUILDING AREA METHOD
SPACE‐BY‐SPACE METHOD
Building Area Type LPD Common Space Types LPDAutomotive Facility 0.9 Automotive Service 0.7
Convention center 1.2Convention Exhibit Space 1.5
Courthouse 1.2 Judge Chambers 1.3
Gymnasium 1.1Gymnasium Fitness Area 0.9
Office 0.9 Office ‐ Enclosed 1.1
Parking Garage 0.3Parking Garage ‐Garage Area 0.2
Retail 1.4 Retail Sales Area 1.6
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Lighting Power Allowance
Calculate the total interior lighting power (Watts) / total floor area of each building area type = Lighting Power Density (LPD)
LPD must be equal to or less than the LPD for the building area type listed in the code table
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Locker Room
Office
12” exterior walls (typical)
8” partition
200 ft
75 ft
125 ft
from interiorsurface of envelope walls
from center of partition walls
Measuring Interior Area
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Locker Room @ 0.8 W/ft2
Open Office @ 1.0 W/ft2
200 ft
75 ft 125 ft
7,500 ft2 x 1.0 W/ft2 = 7,500 W
12,500 ft2
x 0.8 W/ft2
= 10,000 W
Total Allowed Interior Lighting Power = 17,500 W
Allowed Lighting Power
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Interior Lighting Power
Total connected interior lighting power includes: Fluorescent fixture rated
wattage Screw-in socket labeled
max wattage Low voltage lighting
transformer rating Track – 30 Watts/Ft or
circuit breaker ratingSource: Glumac
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Interior Lighting Power
Total connected interior lighting power; including all interior lighting equipment, except:
• Sports Lighting (Professional/TV)• Sleeping Units (hotels, etc.)• Emergency (only) Lighting• Special Needs Lighting• Other Special Categories
C405.5
Source: Lamar LightingSource: ALG online
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Lighting Power Density
What is the wattage of a fluorescent fixture?
Source: OSRAM SYLVANIA
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Lighting Power Density
What is the wattage of a fluorescent fixture?• Ballast or Fixture Manufacturers Data for the Lamp
Ballast Combination
Line Voltage: 120V AC +/- 10%LampsType # AMPSF32T8/ES 2 45 0.38F32T8/ES 1 27 0.23F32T8 2 48 0.41F32T8 1 30 0.26
TRIADB2321120EL
INPUT WATTS
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Case Study: MacColl YMCA
Code LPD – 1.0 W/SF Designed LPD – 0.78
W/SF Reduction – 22% Projected annual
energy savings -$4,224
Source: Ryan Construction
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Review
Interior lighting power density• Calculating the actual power density• Calculating the interior power allowance
Source: a•light
Incentive Opportunity: Incentives available for exceeding code LPD
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Optional Lighting Techniques
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Efficient Lighting Sources & Techniques
High efficacy lamps Electronic and other
efficient ballasts Efficient lighting
fixtures Focus on high quality
lighting design Use “smart” lighting
layoutsSource: Golub Corp
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High Performance “Super” T8 Fluorescent Systems
Improved ballast and T8 lamp
20% improvement in system efficacy
Low and full wattage versions
Extended lamp life up to 50,000 hours
Newest versions promise 100,000 hour life
Adds 0%-10 % to system cost compared to typical instant-start T8
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T8/T5?
The “T” represents lamp shape–tubular. The number following represents lamp diameter in
eighths of an inch. A T5 has a diameter of 5/8”. A T5 has miniature bi-pin bases while T8 and T12
lamps use medium bi-pin bases.
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LED – Solid State Lighting
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Advantages of LED Lighting
Energy efficient; 60 >100 L/W Directional; light where its
needed long lifetime; up to 50,000 hours
@ 70% lumen maintenance Instant on; no warm-up period Dimmable; stepped or
continuous with compatible driver & dimming systems
Start in all temperatures; outdoor & cold storage applications
Very good color rendering (80+ CRI)
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Current LED Lighting Applications
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Install Efficient Fixtures
Efficiency is not just lamps and ballasts Fixtures with advanced photometric design and
premium reflective surfaces offer improved efficiency
Premium efficiency fixtures often allow the installation of fewer fixtures and/or fixtures with fewer lamps
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Install Efficient Fixtures
Efficiency Ranges
Recessed Troffers 60% - 85% Overall Recessed Parabolic 45% - 75% Overall Recessed Indirect 50% - 80% Overall Pendant Indirect & D/I 70% - 95% Overall Recessed CFL 35% - 65% Overall
Incentive Opportunity: Incentives available for exceeding code LPD
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Interior lighting Controls
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Manual Interior Lighting Controls
Independent manual controls are required for each enclosed space
Controls must be within the space or provided with an on/off indicator
Exceptions Security of emergency areas Stairways and corridors (means of egress)
C405.2.1
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Manual or Automatic Lighting Reduction Controls
Each space that is required to have manual controls, must also include controls to reduce lighting load by at least 50%: Manual or auto-dimming Or; Bi-level switching Or; Dual switching of alternate rows of luminaires Or; Switching each luminaire or each lamp
C405.2.1.2
Source: Leviton Lighting Management Solutions
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Manual or Automatic Lighting Reduction Controls - Exceptions
Exceptions apply Spaces with occupancy sensing Areas with one fixture Spaces < 0.6 W/ft2
Corridors; restrooms; lobbies
Source: Lamar Lighting
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Additional Lighting Controls
Each space that is required to have manual controls, must also include:
• Automatic timer systems with override• And/or; occupancy/vacancy sensors• And/or; daylight zone controls
C405.2.2
Source: WattStopper
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Interior Lighting Controls
“Simple” Guide for Compliance: Private offices, conference rooms, classrooms: Vacancy sensor
• Daylit? – Dimming ballasts & manual or auto dimmer• No Daylight? Multi-level lighting exception due to vacancy sensor
Open office areas: Timer or occupancy sensor
• Daylit Zones? - Dimming ballasts & manual or auto dimmer
Break Rooms, janitor closets, restrooms Occupancy or vacancy sensor
General & public areas: Daylit? - Dimming ballasts, manual/auto dimmer & timer No Daylight? - timer
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Occupancy & Vacancy Controls
Occupancy sensors: • Turns lights on upon sensing occupancy • Turn lights off when space is vacated• Best for open spaces and/or spaces lacking ambient light
Vacancy sensors (occupancy sensors with manual “ON”):
• Turn lights off when space is vacated• Lights must be turned on manually• Best for private offices with some ambient light
What’s the Difference?
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Network Lighting Controls
Network Lighting Controls incentive: NLC exceeds IECC 2012 code lighting control
requirements. NLC goals are to obtain substantial lighting kWh savings by using the full capabilities of digitally programmed and networked lighting controls and sensors. • Delivers refined lighting control management • Zones can be easily adjusted and redefined by owner or
occupant• Includes graphic dashboard showing locations and savings• Can tie into HVAC system & BMS
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Project Qualifications: >25,000 sq/ft or greater New construction, major renovation and retrofit
projects are eligible Pre-Qualified Lighting Control Systems required. Controls system must achieve
40% kWh savings below IECC 2012 (ComCheck)
Requires the involvement of qualified lighting or engineering professional -PE., Lighting Certified LC or IALD Specifiers to participate
Network Lighting Controls
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Network Lighting Controls
NBI has published a Technical Application Guide on Network Lighting Controls at:http://newbuildings.org/sites/default/files/LLLC_ZNE_TAG.pdf
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Daylighting and Envelope Requirements
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Daylight Zone Controls
Daylight Zones: • Under skylights –
equal to the size of the skylight plus the floor-to-ceiling heightOr; the dimension to a
partitionOr; ½ the distance to
another fenestration Source: Daylighting Pattern Guide
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Daylight Zone Controls
Daylight Zones: Vertical glazing – area adjacent to the glazing and: Extending into the space
15’ or to a partition Glazing width plus 2’ on
either side Or; ½ the distance to
another fenestration Credit: NREL - Joe Ryan
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Daylighting Zone
Daylight zone adjacent to fenestration in a wall
Credit: IECC
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Daylighting Zone
Daylight zone under a rooftop monitor
Credit: IECC
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Daylighting Zone
Daylight zone under a sloped rooftop monitor
Credit: IECC
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Daylighting Zone
Daylight zone under a roof fenestration assembly
Credit: IECC
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Daylight Zone Controls
Daylight “zones” must have their own (manual or automatic) control
• Each zone – maximum 2,500 ft2
• Exception: enclosed areas with two or fewer light fixtures• Manual or automatic• Continuous or stepped (50-70% + 35%)
C405.2.2.3
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Multi-Level & Daylight Zone Controls
Daylight “Zones” in areas with multi-level switching:• General lighting must be daylight responsive• Must be capable of dimming to minimum of 35% of total lighting load• Continuous or stepped
C405.2.2.3.3
Source: RP Leslie, R Raghavan, O Howlettand C Eaton, 2005. “The potential of simplified concepts for daylight harvesting
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Multi-Level Ballasts
Continuous 5%>100%
C405.2.2.3.3
Stepped Bi-Level 50%>100%
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Example: Classroom
Application:• 28’ X 30’ windowed
classroom with 10’ ceiling• Windows face north
Lighting:• Indirect/direct T8 pendant
with 0-10VDC dimming ballasts for general lighting
• Whiteboard is illuminated by compact fluorescent wall washers with standard electronic ballasts
Source: Joe Ryan/NREL
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Example: Classroom
Source: ALG online
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Example: Classroom
Source: ALG online
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Vertical Fenestrations Maximum Area
Vertical fenestrations limited to 30% of total above grade wall area
Previous code the limit was 40%
C402.3.1
Source: originalgreen.org
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Vertical FenestrationsMaximum Area with Daylight Controls
Vertical fenestration allowance increases to 40% of total above grade wall area
• If; at least 50% of floor area is within a daylit zone• And; automatic daylight controls are installed• And; visible light transmittance is ≥ 1.1 times the SHGC
C402.3.1.1
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Skylights - Maximum Area
Skylights limited to 3% of gross roof area Or; limited to 5% if automatic daylight controls are
installed below skylights
C402.3.1
Source: Daylighting Pattern Guide
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Skylights - Minimum Area
Required; minimum skylight area for some spaces:• Enclosed spaces greater than 10,000 ft2
• Ceiling heights greater than 15’• Offices, lobbies, atriums, concourse, corridors, storage,
gyms, convention centers, auto service, manufacturing, non-refrigerated warehouses, retail, distribution, transportation, workshops
• Daylight zone ≥ 50% of the floor area• % of skylight area to daylight zone ≥ 3%• Or; provide a minimum aperture of 1%
C402.3.2 NEW
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Skylights - Minimum Area
Exceptions:• LPDs less than 0.5 W/ft2
• Areas where objects block the daylight• Areas with daylighting monitors
C402.3.2 NEW
Source: Advanced Lighting Guidelines
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Lighting Controls Under Skylights
All lighting in Daylight Zones must be controlled by multi-level lighting controls as specified in the lighting section C405.2.2.3.3
C402.3.2.1 NEW
NOTE: This is only applicable when skylights are required per section 402.3.2
Source: Daylighting Pattern Guide
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Source: BMG
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Auto Daylighting Controls
OS OS OS OS OS
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Auto Daylighting Controls
OS
OS
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Source: BMG
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Exterior Lighting
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Exterior Lighting Controls
Exterior lighting designated for dusk to dawn operation Automatic photocell control Or; Automatic “astronomical”
timer with a minimum 10-hour power back-up
Other exterior lighting Automatic photocell control &
timer Or; automatic “astronomical”
timer with a minimum 10-hour power back-up
C405.2.4
Source: California Lighting Technology Center
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Exterior Lighting Power
All Lamps Greater Than 100 Watts Must Have an Efficacy Rating of 60 Lumens per Watt or Greater
Exterior Lighting Power Allowance is Calculated Utilizing Exterior Table Chart LPD Assigned by Area Zone & Type Exceptions for Sports, Industrial, Temporary Lighting, and
other Specialized Lighting
C405.6
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Exterior Lighting Zones
1. Developed areas of national parks, state parks, forest land, and rural areas
2. Areas predominantly consisting of residential zoning, neighborhood business districts, light industrial with limited nighttime use and residential mixed use areas
3. All other areas 4. High-activity commercial districts in major
metropolitan areas as designated by the local land use planning authority
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Exterior Lighting Power
INDIVIDUAL LIGHTING POWER ALLOWANCES FOR BUILDING EXTERIORS(Partial)
Zone 1 Zone 2 Zone 3 Zone 4
Parking areas and drives 0.04 W/ft2 0.06 W/ft2 0.10 W/ft2 0.13 W/ft2
Walkways less than10 feet wide
Walkways 10 feet wideor greater, plaza areasspecial feature areas
Stairways 0.75 W/ft2 1.0 W/ft2 1.0 W/ft2 1.0 W/ft2
Pedestrian tunnels 0.15 W/ft2 0.15 W/ft2 0.2 W/ft2 0.3 W/ft2
20 W/linear foot 20 W/linear foot 30 W/linear foot 30 W/linear footof door width of door width of door width of door width
20 W/linear foot 20 W/linear foot 20 W/linear foot 20 W/linear footof door width of door width of door width of door width
Entry canopies 0.25 W/ft2 0.25 W/ft2 0.4 W/ft2 0.4 W/ft2
Free-standing andattached
Open areas (includingvehicle sales lots)
Street frontage forvehicle sales lots in
addition to "open area"allowance No allowance 10 W/linear foot 10 W/linear foot 30 W/linear foot
Outdoor Sales
0.25 W/ft2 0.25 W/ft2 0.5 W/ft2 0.7 W/ft2
Sales Canopies
0.6 W/ft2 0.6 W/ft2 0.8 W/ft2 1.0 W/ft2
0.2 W/ft2
Building Entrances and Exits
Main entries
Other doors
Tradable Surfaces (Lighting power densities for uncovered parking areas, building grounds, building entrances and exits, canopies and overhangs and outdoor sales areas may be traded.)
Uncovered Parking Areas
Building Grounds
0.7 W/linear foot 0.7 W/linear foot 0.8 W/linear foot 1.0 W/linear foot
0.14 W/ft2 0.14 W/ft2 0.16 W/ft2
C405.6.2
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Exterior Lighting Power
Non-tradable uses include:• Building facades• Automated teller machines and night depositories• Entrances and gatehouse inspection stations at guarded
facilities• Loading areas for law enforcement, fire, ambulance, and
other emergency vehicles• Drive-up windows/doors• Parking near 24-hour retail entrances
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Exterior Lighting Exceptions
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Review
Daylighting and envelope requirements Exterior Lighting Lighting Power Lighting Controls
Source: Daylighting Pattern Guide
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System Commissioning
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Lighting System Commissioning
Automatic lighting controls functional testing: Hardware & Software Construction documents designate agent Code official may require 3rd party agent
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Daylighting Control Commissioning Example
Source: Energy Center of Wisconsin; Commissioning for Optimal Savings from Daylight Controls (2013)
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Additional Efficiency Package
Options:1. Efficient HVAC2. Efficient Lighting; LPA Table
C406.3.1*3. On-Site Renewable Energy
*About 10% lower LPA than base code
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Lighting Options Package
Table 406.3 Interior Lighting Power allowances: Building Area Method
Building Area Type LPD (w/ft2)Automotive facility 0.82
Convention Center 1.08
Courthouse 1.05
Dining: Bar lounge/leisure 0.99
Dining: Cafeteria/fast food 0.90
Dining: Family 0.89
Dormitory 0.61
Exercise Center 0.88
Fire Station 0.71
Gymnasium 1.0
Health Care Clinic 0.87
Hospital 1.10
Library 1.18
Manufacturing Facility 1.11
Hotel/Motel 0.88
Table 406.3 Interior Lighting Power allowances: Building Area Method cont.
Building Area Type LPD (w/ft2)
Motion Picture Theatre .83
Multifamily 0.60
Museum 1.06
Office 0.90/.85Performing Arts Theatre 1.39
Police Station .96
Post Office 0.87
Religious Building 1.05
Retail 1.4/1.3School/University 0.99
Sports Arena .78
Town Hall 0.92
Transportation 0.77
Warehouse 0.6
Workshop 1.2
100
Electrical Systems
Electrical Metering• Dwelling Units Separate Meters Required on Each Dwelling
Unit
Unit One
UnitTwo
101
Compliance
102
Compliance Issues –All Commercial Building Types
Lighting
• Mandatory manual & automatic controls critical to energy savings
• Lighting Power Density (LPD) calculations often done incorrectly
• Daylit areas to be controlled separately
• Daylight/Skylight provisions in both envelope and electrical sections
• When COMcheck is used for compliance, fixture wattage and building or space area is often improperly entered
103
ASHRAE 90.1 Energy Cost Budget Method
Energy cost budget method Compare a proposed design with
“code compliant” design Demonstrate proposed design is
at least as energy efficient as the code compliant design
Approach Allows great flexibilitybut Requires considerable effort
Still must meet all mandatory lighting, HVAC, and service water heating requirements
104
Commercial Energy Code Software
COMcheck Compiles user inputs Calculates allowed envelope trade-offs Provides printable organized output
Does not prove compliance Accuracy of inputs is key
105
Project Information- General
106
Documentation
107
Interior Lighting
108
Exterior Lighting
109
Limitations of COMcheck
No trade-offs between envelope, HVAC and lighting systems
Not performance based software
Can only use for buildings up to 40% WWR if demonstrating compliance with the IECC
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Electrical – Key Points
Both manual and automatic lighting control requirements
Use “rated” lamp/ballast wattage to calculate LPD
LPD approach for exterior lighting
Daylit areas need to be controlled separately
Lighting controls must be included in system commissioning
111
Recommended Compliance Procedure
Obtain full project documentation Full set of plans and specifications including:
• Lighting schedule COMcheck or other code compliance
calculations/documentation License numbers and/or other documentation of design
professionals Review plans for code compliance There should be enough detail in project documents to
verify code compliant design Compliance must follow MA Code or 90.1 Building Energy
Cost Methodology & “Mandatory” prescriptive provisions of MA Code
112
Energy efficiency features that should be on the plans for the Lighting System• Lighting fixture schedule with wattage and control narrative• Location of daylight zones on floor plans
Commercial Plan Review Best Practice
Source: BMG
113
Electrical substantial completion• Fixture bulb and ballast type and quantity• Lighting controls• Electric meter for each dwelling unit.
Commercial Inspection –Best Practice
Source: BMGSource: BMG
114
Final inspection• All energy features that were not reviewed during other
inspections
Commercial Inspection –Best Practice
Source: BMG
115
Lighting Project ExampleSherwood Middle School
Source: Gilbane Co. & CENTRIA
Source: Gilbane Co. & CENTRIA
116
Lighting Project ExampleSherwood Middle School
Program challenges included providing lighting solutions for a large flex space and integrating daylighting into a variety of spaces
Lighting Design Includes: LED and Dimmable fluorescent lighting Network lighting control with occupancy sensors and
daylight harvesting High efficiency transformers
117
Lighting Project ExampleSherwood Middle School
• Energy Code Allowable LPD 1.2
• As-built Lighting Power Density 0.70
• Annual kWh Savings (Lighting Only) 67,500
• Lighting System Design 41% better than code
• MA-CHPS Certification
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Resources
Designlights Consortium Qualified Products List (QPL): www.designlights.org/qpl
Advanced Lighting Guidelines (ALGonline): https://www.algonline.org
Daylighting Pattern Guide: www.patternguide.advancedbuildings.net /home
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