Transcript Slide 0

Residential Building Energy
Standards (RBES)
and
Commercial Building Energy
Standards (CBES)
Updates
Better Buildings by Design
Conference - February 10, 2011
Navigant Consulting, Inc.
(Consultants to Vermont DPS)
Efficiency Vermont is a Registered Provider with The American
Institute of Architects Continuing Education Systems (AIA/CES).
Credit(s) earned on completion of this program will be reported to
AIA/CES for AIA members. Certificates of Completion for both AIA
members and non-AIA members are available upon request.
This program is registered with 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.
Learning Objectives
At the end of this program, participants will be able to:
 Gain a better understanding of the current VT
residential and commercial energy codes
 Understand challenges and issues related to
implementation and enforcement of the energy code
 Understand the overall process involved in current
and future Vermont energy code updates
Course Evaluations
In order to maintain high-quality learning experiences, please access
the evaluation for this course by logging into CES Discovery and
clicking on the Course Evaluation link on the left side of the page.
Agenda
• Background and legislative history
—Stu Slote
• Residential Building Energy Standards (RBES)
—Lee Wood
•Q&A
• Commercial Building Energy Standards (CBES)
—Tim Guiterman
•Q&A
4
RBES Update Process
Code Update Process
• Last Update: 2003 VT RBES
• ARRA Requirements: 2009 IECC
• May 27, 2009 - legislature adopted Act 45
• Stakeholder meetings held to gather feedback
• Advisory Committee meetings
• DPS filed rule with ICAR (Interagency Committee on
Administrative Rules)
• DPS held public hearing
• LCAR to conduct hearing and vote on rule
• Rule to be adopted 15 days after filed
• RBES handbook update
5
CBES Update Process
• Last Update: 2005 VT CBES
• ARRA Requirements: 2009 IECC or ASHRAE 90.1-2007
• Technical Advisory Panel (TAP)
—Meetings in June and July of 2010
—Highlighted areas for improvement
—Included changes from current 2012 IECC /
ASHRAE 90.1-2010 update processes
6
CBES Update Process
Overall direction for CBES Update
• Meet minimum 2009 IECC / ASHRAE 90.1-2007
• Add VT-specific amendments and improvements
• Consider substantial changes to create 2012 IECC / ASHRAE
90.1-2010
• New VT CBES codebook (VT-specific version of IECC)
• Continue to maintain reference to ASHRAE 90.1 standard
and allow that as approved compliance path
• Public hearing on proposed rule held Jan 27
• Public comment period ended February 4
• LCAR to conduct hearing and vote on rule
• Rule to be adopted 15 days after filed
7
CBES Update Process
Where are Commercial Codes Headed?
Source: NEEP Building Energy Codes Policy 3/1/2009
8
RESIDENTIAL BUILDING
ENERGY STANDARDS (RBES)
9
Table of Contents
1
Section 1: RBES Administration
2
Section 2: Major Changes to RBES
10
Section 1 » RBES Administration
Administration and Enforcement
2003
2011
Self certification
X
X
Certificate of compliance
X
X
Filing process to remain unchanged
11
Section 1 » RBES Administration
Applicability
2003
2011
New single family homes
X
X
New multifamily homes
X
X
Change in occupancy or use
X
X
Change in space conditioning
X
Additions, alterations, renovations,
or repairs
X
12
Section 1 » RBES Administration
Additions, alterations, renovations, or repairs
Conform as with new construction
Unaltered portions do not need to comply
Additions can comply alone or in combination with
existing building
Exceptions
Storm windows over existing fenestration
Glass only replacements
Exposed cavities already filled with insulation
13
Section 1 » RBES Administration
Exemptions
2003
2011
Very low energy use buildings
X
X
Unconditioned buildings
X
X
Existing Buildings
X
X
Historic Buildings
X
X
Owner Built Homes
X
X
Hunting Camps
X
X
14
Section 1 » RBES Administration
Start
RBES
Compliance
Paths
Mandatory
Requirements
Prescriptive
Approach
R-Values
Table
402.1.1
Either
Total UA
Alternative
402.1.4
U-Factor
Alternative
Table
402.1.3
Performance
Approach
REScheck
HERS Rating
Table of Contents
1
Section 1: RBES Administration
2
Section 2: Major Changes to RBES
16
Section 2 » Major Changes to RBES
Mandatory Requirements
Piping insulation
Vapor Retarder
Mechanical ventilation
Combustion safety
Air Sealing and verification
Lighting
Fenestration U-factors
Programmable thermostat
Duct sealing and testing
Equipment sizing
Snow melt system controls
Pools, hot tubs and spas
17
2003
2011
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Section 2 » Major Changes to RBES
Building Envelope
Component
Ceiling
R-Value
Exemptions
2003
2011
38
49
Source: US DOE
18
1. R-38 if
uncompressed
2. 500 ft2 for
vaulted ceilings
Section 2 » Major Changes to RBES
Building Envelope
R-Value
Component
Wood Frame
Wall
2003
2011
13
20 or
13 + 5
Source: DOE
19
Notes
R-20 cavity
or
R-13 cavity + R-5
sheathing
Section 2 » Major Changes to RBES
Building Envelope
R-Value
Component
Basement or
Crawlspace
Wall
2003
2011
13
15 / 20
Notes
R-15 continuous
or
R-20 cavity
Source: Building Science Corp
20
Section 2 » Major Changes to RBES
Building Envelope
Component
Slab Edge
R-Value
2003
2011
10, 4ft
15, 4ft
Notes
Heated slabs must
have R-15 beneath
entire slab
Source: Building Energy Codes Program
21
Section 2 » Major Changes to RBES
Fenestration
Component
Fenestration
Window U-Factor
Skylight U-Factor
2003
2011
2003
2011
0.40
0.32
NR
0.55
Notes
1. Area-weighted averages
2. 15 ft2 of glazing exempt
3. One opaque door exempt
22
Section 2 » Major Changes to RBES
Air Leakage
Component
Air Leakage
RBES 2003
No testing
requirements
Source: RBES Handbook
23
RBES 2011
1.Test: < 5 ACH@50
2.Visual Inspection
Checklist
Section 2 » Major Changes to RBES
Spillage Testing
Component
Spillage
Testing
RBES 2003
No testing
requirements
RBES 2011
Must establish draft
without spillage within
two minutes
Source: Saturn Resource Management
24
Section 2 » Major Changes to RBES
Temperature Controls
Component
Programmable
Thermostat
RBES 2003
RBES 2011
No requirement
MANDATORY
Lighting
Component
Lighting
RBES 2003
RBES 2011
50% of lamps in
No requirement permanent fixtures highefficacy
25
Section 2 » Major Changes to RBES
Ducts
COMPONENT
RBES 2003
RBES 2011
Must be verified by:*
1. Post-construction test:
No verification
Duct Sealing
requirement
Leakage to outdoors < 6 cfm per 100
ft2 of conditioned floor area (CFA)
2. Rough-in test: Total leakage <
3 cfm per 100 ft2 of conditioned
floor area (CFA)
Duct
Insulation
Same R-value as surrounding
surfaces*
R-8
* Unless located within conditioned space
26
Section 2 » Major Changes to RBES
Mechanical Ventilation
COMPONENT
2003
2011
Balanced systems
X
X
Exhaust-only systems
X
X
Supply-only systems
X
27
Section 2 » Major Changes to RBES
Domestic Hot Water
COMPONENT
Piping Insulation
RBES 2003
RBES 2011
Varied
R-3
Source: Saturn Resource Management
28
Section 2 » Major Changes to RBES
Other Requirements
COMPONENT
RBES 2003
RBES 2011
Snow Melt
Systems
No requirements
Mandatory
automatic controls
Pool Heaters
Mandatory on / off
switch
Mandatory on / off
switch
Pool cover required
Pool cover required
R-12 minimum for
hot tubs and spas
Pool Covers
(heated
pools)
29
Section 2 » Major Changes to RBES
Log Homes
Component
2003
2011
Basement Wall U-Factor
0.10
0.05
Floor U-Factor
0.033
0.026
Ceiling U-Factor
0.026
0.020
Fenestration U-Factor
0.40
0.30
Log walls must comply with ICC400 with average minimum wall
thickness of 5” or greater, and have heating system AFUE of 90%
(gas) or 85% (oil). Boilers must have outdoor temperature reset
or thermal purge control.
30
Questions?
31
COMMERCIAL BUILDING
ENERGY STANDARDS (CBES)
32
CBES Presentation » Overview
• Key Items
• Details on code update
—Administration
—Definitions
—General Requirements
—Envelope
—Mechanical Systems
—Service Water Heating
—Electrical Power and Lighting
33
CBES Presentation » Key Items
• 2012 IECC and ASHRAE 90.1-2010 recently
finalized in Fall 2010
• Significant changes to 2012 IECC initiated by joint
proposals
—Department of Energy (DOE)
—New Buildings Institute (NBI)
—American Institute of Architects (AIA)
• Presentation Format
34
CHAPTER 1
ADMINISTRATION
35
Introduction to Compliance Process
Must the Project
Comply with the
IECC?
Comply with the
Envelope
Requirements
Section 502
90.1 Section 5
Comply with the
Mechanical/SWH
Requirements
Sections 503 and
504
90.1 Section 6
Document
Compliance with the
IECC
Plan Review
Inspection
36
Comply with the
Power & Lighting
Requirements
Section 505
90.1 Section 9
Chapter 1 » Administration
101.2 Scope
—Code does not apply to farm structures or
process applications (equipment / systems)
101.5 Compliance
Exempt Buildings
1. Low energy buildings (<3.4 Btu/h*ft2 for space
conditioning)
2. Unconditioned buildings
3. Inflatable buildings
Context: Re-organizes exemptions from 2005 CBES.
Inflatable & Unconditioned buildings added.
37
Chapter 1 » Administration
101.4.3 : Alterations, Additions, Renovations and
Repairs
—If energy use is not increased, following need
not comply
 Re-roofing where neither sheathing nor
insulation is exposed
 Alterations that replace < 50% of luminaires
 Alterations that replace only bulb and ballast
Context: New in 2009 IECC
38
Chapter 1 » Administration
103: Construction Documents
1. Added: Additional information required on construction
documents
a. Design ambient temperatures; interior temps. for heating /
cooling modes; relative humidity setpoints; ventilation rates
2. Added: Additional info. required on mechanical equipment
schedules
a. Equipment efficiencies; Fan and pump nameplate motor / brake
horsepower; Hydronic system (if applicable) supply / return
water design temps. for boilers and all terminal devices (e.g.
baseboards, unit ventilators, etc); Steam system (if applicable)
design pressure for boilers and all terminal devices
Context: Rarely included, but useful information for code review,
commissioning, future energy audits, etc.
39
CHAPTER 2
DEFINITIONS
40
Chapter 2 » Definitions
Added
• BUILDING ENTRANCE
• BUILDING SITE
• CONTINUOUS AIR BARRIER.
• CONTINUOUS INSULATION (C.I.)
• CURTAIN WALL
• FENESTRATION PRODUCT, SITEBUILT
• F-FACTOR
• HIGH-EFFICACY LAMPS
• LINER SYSTEM (Ls)
• METAL FRAMING
• DAYLIGHT ZONE
• METAL FRAMING, ENTRANCE
DOOR
• DEMAND CONTROL
VENTILATION (DCV)
• METAL FRAMING, FIXED
• ENTRANCE DOOR
• NONMETAL FRAMING
• NAMEPLATE HORSEPOWER
• FENESTRATION PRODUCT, FIELD• STOREFRONT
FABRICATED
Context: Definitions complement new/revised sections of code.
Many are new in 2009 IECC and some from 2012 IECC.
41
CHAPTER 3
GENERAL REQUIREMENTS
42
Chapter 3 » General Requirements
301: Design Conditions
— 2005 CBES: broad allowance for adjustments
— 2011 CBES: adjustments for
1. Winter heating design temperatures for projects located
at either:
a. Elevation of 1,500 feet or higher
b. Caledonia, Essex or Orleans counties
2. As approved by code official or other authority having
jurisdiction
Context: Improve language from 2005 VT CBES which
allowed adjustments for “local design conditions”
43
SECTION 502
BUILDING ENVELOPE
44
Building Envelope
502.2.1: Roof Assembly
—Added: Requirement to insulate skylight and
mechanical curbs to at least R-5
Context: Skylight curbs included in proposal for
2012 IECC. Mechanical curb recommended by
TAP.
45
Building Envelope
Table 502.2 (1) Envelope Tables
1. Envelope R-Values/U-Factors only for Vermont Climate
Zone (CZ) 6
2. Added additional metal building description
and U-factor reference tables
3. Maximum Vertical fenestration area is 40% of abovegrade wall area, same as 2009 IECC. 2005 CBES was
50% maximum
Insulation
Parallel to Purlin
Thermal Blocks
46
Insulation
Draped Over
Purlin
Picture from NAIMA
Building Envelope - Opaque Assemblies
Roofs
2005
CBES
2009 IECC /
90.1-2007
2011
CBES
R - 24 ci
R - 20 ci
R - 30 ci
U - 0.040
U - 0.048
U - 0.032
R - 19 + R - 10
or R - 30
R - 13 + R - 19
R - 11 + R - 13ci
Metal
Buildings
U - 0.051
U - 0.049
U - 0.045
N/A
N/A
Steel Joist
R - 30 + R - 5ci (with
R - 5 thermal blocks)
U - 0.027
Attic and
other
R - 38
U - 0.27
R - 38
U - 0.27
R - 38
U - 0.027
Roof:
Insulation
entirely
above deck
47
Building Envelope - Opaque Assemblies
WallsAbove
Grade
Mass
Metal
building
Metalframed
Woodframed
and other
2005
CBES
2009 IECC /
90.1-2007
2011
CBES
R - 9.5 ci
R - 13.3 ci
R - 13.3 ci
U - 0.104
U - 0.080
U - 0.080
R - 19 or
R - 6 + R - 13
R - 13 +
R - 5.6 ci
R - 11 + R - 6.5 ci
U - 0.070
U - 0.069
U - 0.054
R - 13 + R - 7.5 ci
R - 13 + R - 7.5 ci
R - 13 + R - 7.5 ci
U - 0.064
U - 0.064
U - 0.064
R - 19 or R - 12 ci or R - 13 + R - 7.5 ci
R - 13 + R - 3.8 ci
U - 0.064
U48 - 0.051
R - 13 + R - 7.5 ci or
R - 20 + R - 3.8 ci or
R - 23
U - 0.051
Building Envelope - Opaque Assemblies
Walls-Below
Grade
2005
CBES
2009 IECC /
90.1-2007
2011
CBES
R - 10 ci
R - 7.5 ci
R - 10 ci
Below Grade Wall C - 0.092
C - 0.119
C - 0.092
Note: VT was already ahead of 2009 IECC. Recommendation
to maintain current 2005 VT CBES values.
49
Building Envelope - Opaque Assemblies
Floors
Mass
Joist /
FramingMetal*
2005
CBES
2009 IECC /
90.1-2007
2011
CBES
R - 10ci
R - 12.5 ci
R - 12.5 ci
U - 0.074
U - 0.064
U - 0.064
R - 30
U - 0.038
R - 30
R - 30
R - 30
U - 0.033
R - 30
Joist /
U - 0.033
Framing-Wood
U - 0.033
U - 0.033
and Other*
*Note: Final version will consolidate 2 categories into one,
50
per 2009 IECC
Building Envelope - Opaque Assemblies
Slab-on-Grade
Floors*
Unheated
Heated
2005
CBES
2009 IECC/
90.1-2007
2011
CBES
R - 10 for 48
inches
R - 10 for 24
inches below
R - 10 for 48 inches
F - 0.64
F - 0.55
F - 0.48**
R - 10 for entire
slab (under slab
and perimeter)
R - 15 for 24
inches below
R - 10 for entire
slab (under slab
and perimeter)
F - 0.55
F - 0.86
F - 0.55
* Insulation shall be placed on the exterior of the foundation
** Change to F-Value from 2005 CBES to reflect vertical installation
(Or downward to bottom of slab and then horizontally for total distance shown
in table)
51
Building Envelope - Opaque Assemblies
Opaque
Doors
Note:
Swinging
Roll-Up or
sliding
UpwardActing or
Sectional
2005
CBES
2009 IECC/
90.1-2007
2011
CBES
U - 0.50
U - 0.70
U - 0.37
R - 10
U - 0.50
U - 0.50
N/A
N/A
R - 10
Note:
• 2009 IECC / ASHRAE 90.1 only provides U-Factors
• Upward-Acting or Sectional is new and unique to VT code
52
Building Envelope - Fenestration
Category
Vertical Fenestration
(Maximum %)
Framing Materials other than
Metal with or without Metal
Reinforcement or Cladding
Metal framing with or without
Thermal Break
Curtain Wall/Storefront
Entrance Door
All Other
SHGC-All Frame Types
PF < 0.25
0.25 < PF < 0.5
PF >= 0.5
Skylights (Maximum %)
Skylights, Glass
Skylights, Plastic
2005 CBES
2009 IECC
2011 CBES
50%
40%
40%
U-0.35
U-0.35
U-0.35
U-0.45
U-0.80
U-0.50
U-0.45
U-0.80
U-0.55
U-0.42
U-0.80
U-0.50
U-0.40
U-0.55
NR
U-0.40
NR
NR
U-0.40
U-0.55
NR
5%
U-0.60
SHGC-0.40
3%
U-0.60
SHGC-0.40
3%
U-0.50
SHGC-0.40
U-0.60
SHGC-0.62
53
Plastic Not
Specified
Plastic Not
Specified
Building Envelope
502.4. Air Leakage
— 2005 CBES and 2009 IECC: broad language
— 2011 CBES: Mandatory continuous air barrier
 Air barrier compliance options
– Option 1: Materials
– Option 2: Assemblies
– Option 3: Building Test (0.31 cfm/ft2 of shell area @ 50 Pa)
 Air Barrier penetrations-explicit language on air sealing
 Fenestration air leakage table
Context
• Substantial part of joint DOE/NBI/AIA proposal to 2012 IECC
• Originally adapted from MA building code, so “field-tested”
and regionally appropriate
54
Building Envelope
502.4.7 Vestibules
1. Revised to reflect changes in proposed 2012 IECC
a. Utilizes new definition of “Building Entrance”
2. VT - specific:
a. If vestibule is tempered, max temperature setting of 55° F;
Cooling prohibited
b. If tempered, shall be constructed according to envelope
provisions
c. If tempered, thermostat shall be programmable and
inaccessible to public
Context
1. Improved language from model IECC codes
2. TAP recommended changes due to extensive issues with
energy use due to heating and cooling of vestibules
55
SECTION 503
BUILDING MECHANICAL
SYSTEMS
56
Building Mechanical Systems
Overview of changes due to 2009 IECC
• Revises equipment efficiency tables for water-chilling
packages; minimum equipment efficiencies changed
• Requires snow melt control
• Requires demand control ventilation (DCV) for certain spaces
• Removes exception for energy recovery ventilation for lab
fume hood systems ≤ 15,000 cfm
• Lowers the system capacity for economizer requirement for
most climate zones
• Introduces fan power limitations
• Introduces supply air temperature reset controls for multiplezone systems
57
Building Mechanical Systems
1. 503.1.2 Electric Resistance Space Heating
— Prohibition on electric resistance space heating
a. Carried over from 2005 VT CBES
2. 503.2.5 Ventilation
a. References ASHRAE 62.1-2007 rather than IMC
b. Added language emphasizing ventilation rates to be based
on expected occupancy levels versus default IMC /
ASHRAE 62.1 rates
Context
1. Important prohibition on electric resistance heating that has
worked for VT
2. Prevents designers from using worst-case ventilation rates
when better information is available
58
Building Mechanical Systems
503.2.5.2: Demand Controlled Ventilation
• 2005 CBES had no DCV requirement
• 2011 CBES (2009 IECC): DCV must be provided for each zone
with spaces > 500 ft² and average occupant load > 40 people / 1000
ft² of floor area where HVAC system has:
 An air-side economizer, or
 Automatic modulating control of outdoor air damper, or
 Design outdoor airflow > 3,000 cfm
Demand control ventilation (DCV):
ventilation system capability that
provides for automatic reduction of
outdoor air intake below design
rates when actual occupancy of
spaces served by system is less than
design occupancy
59
Building Mechanical Systems
503.2.7: Duct and Plenum Insulation and Sealing
• 2005 CBES (Also 2009 IECC): Minimum R-5
(unconditioned space) and R-8 (outside building)
• 2011 CBES : “All supply and return ducts located in
unconditioned spaces shall be insulated to meet same Rvalue requirement that applies to immediately proximal
surfaces.”
Context: Altered to align with RBES
• Public comments raised to address this language
— Clarify
— Feasibility
60
Building Mechanical Systems
503.2.10: Systems Performance Verification and Completion
1. Buildings ≥ 50,000 SF
2. Requirements for independent, third-party
commissioning agents to perform basic functional
testing to verify efficient “as-designed” operation of
systems specified in other parts of code, limited to:
a. Economizers
b. VAV fan control
c. Part-load hydronic controls
FAIL
3. Prescriptive testing requirements
61
Building Mechanical Systems
503.2.10 Systems Performance Verification and Completion
(Continued)
Context
1. 2012 IECC dedicates separate chapter to commissioning (Cx)
requirements
2. Cx for buildings > 50K ft2 as starting point for code requirements
3. Current proposal provides testing ground for future Cx
requirements in VT, utilizing only large buildings
4. Feedback from use of 2012 IECC and VT requirements will be
helpful for next update of VT code
5. Performance verification should ensure systems comply with
code intent and operating at maximum energy efficiency
6. Performance verification improves building performance,
hopefully reduces contractor call-backs, issues
62
Building Mechanical Systems
Revised 503.3.1 Economizers and 503.4.1 Economizers (Complex
HVAC Systems)
1. Economizers required on all systems ≥ 54,000 Btu / h (2005 CBES ≥
65,000 Btu/h)
2. Defined allowable economizer sequences to align w/ASHRAE 90.1-2007
3. Clarified section 503.4.1 using improved language from 2012 IECC
proposals
a. Design Capacity
b. Maximum Pressure Drop
c. Integrated Economizer Control
Context
1. Matches 2009 IECC capacity threshold
2. Need to clarify 2005 VT CBES and Economizer sections in 2009 IECC
vague
3. National IECC code also using these changes to align w/ ASHRAE 90.1
63
Building Mechanical Systems
503.4.2 VAV Fan Control / 503.4.3 Hydronic Systems
Controls / 503.4.3.6
1. Added: 503.4.2.1 Static Pressure Sensor Location
language
2. Revised: 503.4.3.4 Hydronic variable flow systems
language
3. Added: 503.4.3.6 Chilled and Hot Water Temperature
Controls
Context
1. Language not in 2009 IECC but existed in ASHRAE
90.1-2007
2. Language taken from 90.1-2007
3. Language taken from 90.1-2007
64
SECTION 504
SERVICE WATER HEATING
65
Service Water Heating
504.1.1 Electrical Water Heating Limitation
Added: Electric service water heating units shall be limited
to a maximum of 5 kW total power input
Context: Carried over from 2005 VT CBESES
Yes, that is David Hasselhoff
66
SECTION 505
ELECTRICAL POWER AND
LIGHTING SYSTEMS
67
Electrical Power and Lighting
Major changes to electrical power / lighting due to 2009 IECC
• Adds high-efficacy lighting requirement for dwelling units
• Requires separate controls for daylight zones
• Allows for use of photocell in tandem with other controls on
certain exterior lighting applications
• Adds exempted lighting applications that can be excluded from
total connected interior lighting power calculations
• Revises additional lighting power allowance calculations for
retail areas
• Creates four exterior lighting zones based on lighting need
68
Electrical Power and Lighting
Interior Lighting Power Allowances
1. Building Area Method and Space by space Method included
2. LPD values taken from proposed 2012 IECC values
Context
1. 2005 VT CBES contained both methods but 2009 IECC still
only used Building Area Method
a. 2012 IECC will have both methods
2. 2005 VT CBES values identical to 2009 IECC
a. 2012 IECC values include revised categories, higher
efficiency for certain categories, and scaled back values for
others
b. 2011 VT CBES will be aligned with 2012 IECC and
ASHRAE 90.1-2010
69
Electrical Power and Lighting
• Interior Lighting Power Allowances
— Changes to Building Area Method Spaces
2005
CBES
2009 IECC
2011
CBES
Office
1.0
1.0
0.9
Retail
Fire Station
Warehouse
1.5
1.0
0.8
1.5
1.0
0.8
1.4
0.8
0.6
— All others unchanged from 2005 CBES
— Some changes in space-by-space types:
 Revised categories, higher efficiency for certain categories,
and scaled back values for others
70
Electrical Power and Lighting
Motors and Transformers
1. Added NEMA efficiency tables for motors
2. Added NEMA efficiency tables for transformers
Context
1. VT CBES included these. Maintained in 2011 VT CBES.
Motor tables are included in ASHRAE 90.1-2007.
2. VT CBES included these. Maintained in 2011 VT CBES.
71
Questions?
72