what is in the obc sb-10 update? - home | ontario ... is in the obc sb-10 update? ontario gets...
TRANSCRIPT
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What is in the OBC SB-10 Update?
Ontario Gets Serious about Energy Use in New Buildings
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What is in the OBC SB-10 Update?
Ontario Gets Serious about Energy Use
in New Buildings
Steve Kemp P.Eng., M.A.Sc., B.Sc., B.Eng.
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Introduction
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OBC Introduced SB-10 in 2007 Prescribed minimum energy performance MNECB + ASHRAE 90.1-2004
Update published in July 2011, effective Jan 2012 Update is implementation of ASHRAE 90.1-2010 +
ASHRAE 189.1-2009 envelope values Three methods of compliance Performance Prescriptive + envelope trade-off Prescriptive
Today will focus on prescriptive path
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Agenda
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What does the code say SB-10 Division 3 Enclosures requirements
Common constructions that may no longer be compliant How to “fix” them
Mechanical/Electrical requirements
SB-10 Division 4: Part 9 Non-Residential Enclosure requirements Mechanical/Electrical requirements
Compliance paths Closing remarks
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Documents involved in the Code OBC 2006 Supplementary Standard
SB-10, July 1, 2010 Update http://www.mah.gov.on.ca/P
age9528.aspx http://www.mah.gov.on.ca/A
ssetFactory.aspx?did=9227
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Documents involved in the Code ASHRAE 90.1-2010
(and User’s Manual) ASHRAE 189.1-2009
(and User’s Manual) http://www.techstreet.com/
ashraegate.html
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Documents involved in the Code MNECB 1997 http://www.nrc-
cnrc.gc.ca/eng/ibp/irc/codes/97-energy-code-buildings.html
FYI: NECB-2011 is now published (not currently a part of OBC)
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SB-10 July 2011 Division 1: General
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Energy Efficiency after December 31, 2011 Division 3: All buildings to conform to of SB-10 July 2011 update
i.e. all non Part 9 buildings
Except when within the scope of Division B Part 9 then,
Division 4 of SB 10:
if the building is within the scope of Part 9 Div B of the OBC and, does not contain a residential occupancy, and does not use electric space heating, and, is intended for occupancy on a continuing basis during the winter months
i.e. most Non-Residential Part 9 buildings
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SB-10 Division 3
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1.1.2 Energy Efficiency Three paths to demonstrate performance
Building shall use
25% less energy than MNECB – Energy Modeling 5 % less energy than ASHRAE 90.1-2010 – Energy Modeling Not exceed ASHRAE 90.1-2010 and Chapter 2 (which replaces the 90.1enclosure
performance values) – Energy Modeling or Prescriptive
Exceptions Heritage buildings Any building space which uses less than 12 W/m² peak energy Temporary structures Warehouses and storage rooms with design temperature under 10°C Primarily intended for manufacturing processing, commercial processing or
industrial processing And other exceptions…
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SB-10 Div 3: Examples of Exemptions
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OBC Compliance Paths
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OBC Compliance
90.1-2010 + Chapter 2
90.1 + Chapter 2 Mandatories
90.1 Prescriptive + Chapter 2
Energy modeling against 90.1 +
Chapter 2 prescriptive
25% Less than MNECB MNECB Mandatories
Energy Modeling against MNECB
prescriptive
5% Less than 90.1 2010 90.1 Mandatories
Energy modeling against 90.1 prescriptive
Today’s Focus
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Today’s Presentation of Materials for Division 3
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Largely will follow 90.1-2010 organization
Will note SB-10 revisions (hint mostly in envelope)
Today’s emphasis is on envelope
Some attention paid to mechanical / electrical
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ASHRAE 90.1-2010 / SB-10 Prescriptive Path
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Outlines minimum performance parameters for: Wall, Roofs, Windows elements etc.
Prescriptive and performance paths for insulation Weighted U-value allowed for some trade-offs within element type Envelope Trade-off calculations required for trade-offs across element
types
Maximum fenestration-to-wall ratio 40% Installed lighting power density Receptacle requirements Labeling (insulation, fenestration) HVAC plant minimum performance requirements (boilers, chillers) HVAC distribution performance requirements (fans, pumps) etc
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Division 3 Chapter 2
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Enforces ASHRAE 90.1 2010 as minimum energy code for OBC
Provides revisions to 90.1-2010 Section 1 “Purpose” Section 2 “Scope” Section 3 “Definitions” Section 4 “Administration and Enforcement” Section 5 “Building Envelope” Section 6 “HVAC” Section 7 “Service Hot Water” Section 10 “Other Equipment” (electric motors)
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90.1-2010 Section 1 Purpose: To establish minimum energy
efficiency requirements of buildings other than low-rise residential
Note: ASHRAE is rebranding, not just HVAC&R anymore
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90.1 Adoption as Building Code Most widely adopted building energy standard in North
America British Columbia 90.1-2004
Vancouver 90.1-2007
Ontario 90.1-2010 +
189.1-2009 envelope
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90.1 History of Energy Improvements
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0
100
200
300
400
500
Before 1920 1920-1959 1960-1969 1970-1979 1980-1989 1990-1999 2000-2004
Tota
l Ene
rgy
Inte
nsity
(ekW
h/m
²)
Year building was contructed
Energy Use of All Buildings – By Age of Construction
Ref: Commercial and Institutional Building Energy Use, NRCAN 2005
Zero energy buildings by year 3300
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90.1-2010 Section 2
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Scope Establishes Energy Efficiency requirements for:
New Buildings and their systems New portions of buildings and their systems New systems and equipment in existing buildings!
SB-10 does not enforce any requirement for existing buildings Part 11 currently does not enforce any energy requirements for renovations
New equipment or building systems specifically identified in the standard that are a part of industrial or manufacturing processes
Establishes Criteria for identifying compliance! OBC largely silent regarding details of this, look to your local code
official! – more on this in end of session discussion Does not apply to:
Single family homes, multi family buildings under 3 stories, manufactures homes, or buildings that do not connect to utilities Note: non-grid connected buildings have other reasons to greatly exceed this
code!
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90.1-2010 Section 3
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Definitions, Abbreviations and Acronyms OK sounds boring… BUT
How to interpret RATED R-VALUE How to interpret SPANDREL How to interpret METAL ROOF How to interpret ADOPTING AUTHORITY How to interpret BASELINE BUILDING DESIGN How to interpret ATTIC ROOF How to interpret SKYLIGHT How to interpret FENESTRATION AREA How to interpret F-FACTOR, U-FACTOR, C-FACTOR How to interpret CONTINUOUS INSULATION! AND LOTS OF OTHER STUFF!
Read this section! (hint spandrel, U-factor, Continuous Insulation) FYI: Spandrel sucks!
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90.1-2010 Section 4
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Administration and Enforcement Interpretations, claims of exemption and rights of appear are
specified by the authority having jurisdiction Conflict with other laws, codes etc, to be determined by
authority having jurisdiction Normative Appendices are considered a part of the standard
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90.1 Section 5 90.1 Requirements SB-10 Revisions
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90.1 – Air Barriers / Vestibules 5.4.3.1 Continuous Air Barrier Clearly identified or otherwise
noted on construction documents for each assembly
The joints, interconnections and penetrations shall be detailed or otherwise noted
5.4.3.1.A. Air Barrier Materials, Assemblies and Systems (1) The air barrier materials,
assemblies and systems that are in conformance with Part 5 of Division B of the Building Code shall be deemed to be in compliance with Sentence 5.4.3.1.3 and Sentence 5.4.3.2.
5.4.3.4 Shall have vestibules, exceptions: Building entrances with
revolving doors Doors not intended to be a
building entrance Doors opening directly from a
dwelling unit Building is less than 90 m² Doors separate from the
building entrance that open unto a space under 280 m²
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Division 3 Chapter 2 Revision
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Mandatories insulation details introduced from MNECB 1997
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Div 3 Ch 2 Revision to 90.1 – Slab Insulation 5.5.3.5.1 Slabs. Insulation
continuity shall be maintained in the design of slab edge insulation systems. Continuity shall be maintained from the wall insulation through the slab/wall/footing intersection to the body of the slab edge insulation. Several representative configurations are illustrated in Figure 5-1
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Div 3 Ch 2 Revision to 90.1 – Insulation Continuity 5.5.3.5.2 Where insulative
continuity is impossible because of structural constraints, a minimum overlapping of insulation is acceptable. The insulation must overlap by a distance equal to (or greater than) four times the minimum insulation separation, as shown in Figure 5-2.
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Div 3 Ch 2 Revision to 90.1 – Thermal Bridging 5.5.3.7 For the purposes of Section 5,
the effects of thermal bridging are waived for: intermediate structural connections of
continuous steel shelf angles (or similar structural element) used to support the building facade provided there is a thermal break between the remaining contact surface of the supporting element and the building structure. This provision is intended to substantially reduce thermal bridging effects caused by the continuous bearing between structural elements supporting building facade and the building frame (ie. steel shelf angle attached to perimeter floor slab to support brick veneer), or
structural connections of load bearing elements where a thermal break cannot be achieved
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Div 3 Ch 2 Revision to 90.1 – Thermal Bridging 5.5.3.8 In addition to the exceptions
permitted above, the effects of thermal bridging are also waived for: a) exposed structural projections of
buildings where the total cross-sectional area of the exposed element does not exceed 2% of the exterior building envelope area and the cross-sectional area of the exposed structural element is measured where it penetrates the insulation component of the building envelope. (For example, if the total cross-sectional area of cantilevered concrete balconies and other projections penetrating the insulation component of the building envelope does not exceed 2% of the exterior building envelope area, their thermal bridging effects need not be taken into account)
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Div 3 Ch 2 Revision to 90.1 – Thermal Bridging Cont’d 5.5.3.8 In addition to
the exceptions permitted above, the effects of thermal bridging are also waived for: b) ties in masonry construction, c) flashing, and d) top exposed portion of
foundation walls provided the exposure does not exceed 200 mm measured from the top of the foundation wall to the top of exterior wall insulation which meets the minimum insulation RSI-Value for wall below grade stipulated in the appropriate Tables. (See Figure 5-3)
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90.1 Section 5 Building Envelope Climate Definitions Many prescriptive
requirements depend on climate
ASHRAE Climate Zones: 1 thru 8 Modifier (HVAC):
A – Moist B – Dry C – Marine
Ontario climates are: 5 thru 7 all A – moist
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90.1 Section 5 Building Envelope Climate Definitions (SB-10 revision highlight)
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If space is electrically heated, then ALWAYS use Zone 7
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90.1 Chapter 5 Building Envelope Climate Requirements (SB-10 revision highlight)
Climate Zone 5: Brantford Mississauga Hamilton Sarnia Windsor
Climate Zone 6: Kitchener/Waterloo Toronto Kingston Ottawa
Climate Zone 7: Cochrane North Bay Sudbury Thunder Bay Northern Ontario!
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90.1 Chapter 5 Space Conditioning Categories 90.1 Section 5.5 Comply with Tables
(SB5.5-5 thru -7) Minimum RATED R-values
of insulation Maximum U-Factor, C-
Factor or F-Factor Appendix A tables Appendix A9 calculations 2-D calculations (e.g. Therm)
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90.1 Chapter 5 How to Use Envelope Tables Determine envelope
category Roof
Insulation above deck Metal Building Attic & other
Walls above grade Mass Metal Building Steel-framed Wood-framed & other
Etc.
Determine space conditioning category Non-Residential Residential Semi-heated
Determine Climate Zone 5, 6 or 7
Today’s examples will be: Climate Zone 6 Non-Residential
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90.1 Chapter 5 – Roof Requirements (SB-10 revisions)
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Roofs: Metal Building: a roof that: is constructed with a metal, structural, weathering surface has no ventilated cavity, and has the insulation entirely below “deck”
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90.1 Chapter 5 – Roof Requirements (SB-10 revisions)
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ci (continuous insulation): Insulation that is continuous across all structural members without thermal bridges other than fasteners and service openings. It is installed on the interior or exterior or is integral to any opaque surface of the building envelope
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ASHRAE Appendix A Assembly U-Factors for Roofs with Insulation Above Deck
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ASHRAE Appendix A Assembly U-Factors for Metal Roofs
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ASHRAE Appendix A Assembly U-Factors for Wood Joists, Single Rafter Roof
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ASHRAE 90.1 Appendix A Roof Assembly U-Factors
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Available Tables: A2.2 Roofs with Insulation Entirely Above Deck A2.3 Metal Building Roofs A2.4 Attic Roofs with Wood Joists A2.4.2 Single Rafter Roofs A2.5 Attic Roofs with Steel Joists
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90.1 Section 5 – Above Grade Wall Requirements (SB-10 revisions)
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Steel Framed Wall: Includes curtain-wall / window-wall spandrel panel
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ASHRAE Appendix A Above-Grade Concrete Walls & Masonry Walls
43
No Listed Concrete or Masonry wall with continuous metal framing can meet code.
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ASHRAE Appendix A Above-Grade Concrete Walls & Masonry Walls
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ASHRAE Appendix A Above-Grade Concrete Walls & Masonry Walls
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ASHRAE Appendix A Metal Building Walls
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ASHRAE Appendix A Steel-Frame Walls
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ASHRAE Appendix A Wall Assembly U-Factors
48
Available Tables: A3.1A Above-Grade Concrete Walls and Masonry Walls
A3.1B U-Factors, C-Factors, Ru, Rc and HC for Concrete A3.1C U-Factors, C-Factors, Ru, Rc and HC for Concrete
Block Walls A3.1D Effective R-Values for Insulation/Framing Layers
Added to Above/Below Grade Mass Wall
A3.2 Metal Building Walls A3.3 Steel-Frame Walls A3.4 Wood-Frame Walls
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13 mm drywall 102 mm steel stud @ 400
mm oc 13 mm exterior sheathing 102 mm z-girt @
600 mm oc with semi-rigid
Metal siding
Metal Cladding with Z-Girts
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Metal Cladding with Z-Girts
Nominal R-15 OBC Requirement: U-0.055 BTU/hr-ft²-°F Actual R-8.6 Assembly: U-0.116 BTU/hr-ft²-°F
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13 mm drywall 102 mm steel stud @ 400
mm oc 13 mm exterior sheathing 51 mm z-girt @
600 mm oc with spray foam
51 mm z-girt @ 600 mm oc with spray foam
Metal siding
Metal Cladding with Orthogonal Z-Girts and Spray Foam
51
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Metal Cladding with X Z-Girts and Spray Foam
52
Nominal R-24 OBC Requirement: U-0.055 BTU/hr-ft²-°F Actual R-21 Assembly: U-0.048 BTU/hr-ft²-°F
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Spandrel ??
53
Nominal R-14 OBC Requirement: U-0.055 BTU/hr-ft²-°F Actual R-4.0 Assembly: U-0.250 BTU/hr-ft²-°F
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Spandrel will be challenging (condensation?)
54
With 1” XPS interior insulation Nominal R-19 Actual R-9.1 OBC Requirement: U-0.055 BTU/hr-ft²-°F Assembly: U-0.11 BTU/hr-ft²-°F With 2” XPS interior insulation Nominal R-24 Actual R-14.2 OBC Requirement: U-0.055 BTU/hr-ft²-°F Assembly: U-0.070 BTU/hr-ft²-°F
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Spandrel – 3D Results (ASHRAE RP-1365 by Morrison Hershfield)
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Spandrel – 3D Results (ASHRAE RP-1365 by Morrison Hershfield)
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90.1 Section 5 – Below Grade and Floor Requirements (SB-10 revisions)
57
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ASHRAE Appendix A Slab on Grade Floors
58
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90.1 Section 5 – Maximum Fenestration Area
59
5.5.4.2.1 Vertical Fenestration Area The total vertical
fenestration area shall be less than 40% of the gross wall area
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R3
R4
R2 Modern
Old
Perhaps this is the reason why?
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Glass and the Walls they’re in… - John Straube
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Windows in the Whole Building - Daylighting
Study by: Athanassios Tzempelikos (Concordia)
35% Fenestration to Wall ratio yields 90% of the daylight as 100% FWR
Courtesy: Athanassios Tzempelikos
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Windows in the Whole Building - Energy LBNL Building Design
Advisor Curtainwall – Vancouver City Library
63
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And that’s just the recent information! R. Sullivan, E.S. Lee, S.
Selkowitz, LBNL “A Method of Optimizing
Solar Control and Daylighting Performance in Commercial Office Buildings”
September 1992
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Further back in history… Johnson C A. Besant R W.,
Schoenau G J., University of Saskatchewan “Economic preferred
window orientation and optimum fenestration design of a non-daylit and daylit large office building for different climatic conditions and different billing structures” - 1986
Best LCC (not energy) in Saskatoon… No Windows!
No low-e or Argon back
then
Other locals 10-15% FWR
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90.1 Section 5 – Fenestration Requirements (SB-10 revisions)
66
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Window heat loss Flanking (and
installation)
Frame Edge of Glass Centre of Glass
glazing system U-value
Curtain Wall Plan View
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90.1 Section 5 – Determining Fenestration Performance
68
5.8.2 Vertical Fenestration U-Factors & SHGC shall be determined in accordance with: Standard NRFC 100 or CSA-A440.2 or 90.1-2010 Table A8.2 – not recommended!
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90.1 Section 5 – Determining Fenestration Performance
69
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90.1 Section 5 – Determining Fenestration Performance FramePlus Online for
project estimating
Need supplier CSA/NFRC rating for code compliance
http://tools.enermodal.com/webframeplus
http://cmast.nfrc.org
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FramePlus Online Curtain-Wall Performance
71
0.00
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0 2 4 6 8 10 12 14 16 18 20
Fene
stra
tion
Sys
tem
U-v
alue
Curtain Wall Frame Thermal Break Size in mm
Curtain Wall System U-values [BTU/ft²-hr-°F]
Dbl SB60 Argon
Tpl SB60 Argon
Climate Zone 5 & 6
Climate Zone 7
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FramePlus Online Punched Alum Window Performance
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0.00
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tion
Sys
tem
U-v
alue
Aluminum Frame Thermal Break Size in mm
Punched Aluminum Window U-values [BTU/ft²-hr-°F]
Dbl SB60 Argon
Tpl SB60 Argon
Climate Zone 5 & 6
Climate Zone 7
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FramePlus Online Casement/Awning Alum Window Performance
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stra
tion
Sys
tem
U-v
alue
Aluminum Frame Thermal Break Size in mm
Casement/Awning Aluminum Window U-values [BTU/ft²-hr-°F]
Dbl SB60 Argon
Tpl SB60 Argon
Climate Zone 5 & 6
Climate Zone 7
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90.1 Section 5 Limits of Prescriptive Compliance
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Prescriptive Compliance with 90.1-2010/SB-10 Prescriptive Building Envelope Option, provided that,
the vertical fenestration area is 40% or less of gross wall area for each space-conditioning category and
the skylight fenestration area 5% or less of gross roof area for each space-conditioning category
U/C/F-Factor area weighted trade-off
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90.1 Section 5 Minimum Skylight Area
75
5.5.4.2.3 Minimum Skylight Fenestration Area for Climate Zone 5! 1% to 3% of roof area (read for details) For spaces with
In building four stories or less roof height of 4.6 m or greater and Floor area of 465 m² or greater Of type: office, lobby, atrium, concourse, corridor, non-refrigerated warehouse or
storage, gymnasium, convention center, automotive service, manufacturing, retail, distribution/sorting area, transportation or workshop
Exemptions for:
General lighting power less than 5.4 W/m² Site conditions and/or architectural features would block skylight (read for details) Skylight area can be reduced to account for sidelight
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90.1 Section 5 SHGC of Vertical Fenestration
76
5.5.4.4.1 SHGC of Vertical Fenestration Comply with Tables SB5.5-5 thru -7 (maximum SHGC) Modifier allowed for permanent architectural features that
shade window Exceptions for street side fenestration (read for details):
provided street-level story 6 m high or less and has a continuous overhang
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90.1 Section 5 Fenestration Orientation
77
5.5.4.5 Fenestration Orientation “South” Fenestration Area must greater or equal to “west” and
“east” As ≥ Aw and As ≥ Ae
Exceptions for nearly any site restrictions Topography, adjacent structures within 6 meters Exceptions for 5.5.4.4.1 (street side fenestration)
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90.1 Section 5 Labeling
78
5.8.2 Labeling of Fenestration and Doors All products shall have a permanent nameplate installed by the
manufacturer OR Signed and Dated certification from manufacturer
U-factor, SHGC, VT, air leakage rate NRFC / CSA evaluation for performance values
Or use Appendix A values for Door, Windows
Remember vertical fenestration table!
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90.1 Section 5 Envelope Trade-Offs within Prescriptive Path – Area Weighted
79
Area weighted U / C / F factors within Class of construction and Space conditioning category
Can trade off: Steel Framed / Non-Residential Walls with
Steel Framed / Non-Residential Walls
Attic / Non-Residential Roof with Attic / Non-Residential Roof
Metal Framing Vertical Fenestration Residential with Metal Framing Vertical Fenestration Residential
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Complying with Prescriptive Envelope: Area Weighted U-Factor
Gross Walls
15,020 U-Factor Reff W1 Spandrel 4,735 31.5% 0.154 6.5 W2 Steel Frame 4,735 31.5% 0.055 18.2 Window 5,550 37.0%
Uavg 0.104 Ravg 9.576
Gross Walls 15,020 U-Factor Reff W1 Spandrel 4,735 31.5% 0.154 6.5 W2 Steel Frame 4,735 31.5% 0 Infinite! Window 5,550 37.0%
Uavg 0.077 Ravg 13.000
Gross Walls 15,020 U-Factor Reff W1 Spandrel 2,368 15.7% 0.154 6.5 W2 Steel Frame 7,103 47.3% 0.022 45.5 Window 5,550 37.0%
Uavg 0.055 Ravg 18.195
U-Factor Target for Steel Frames Walls: 0.055
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Envelope Trade-Offs within Prescriptive Path – Building Envelope Trade-off 90.1 Section 5.6 comply with:
5.1General 5.4 Mandatories 5.7 Submittals 5.8 Product information and
installation requirements
the envelope performance factor is less than or equal to budget building Appendix C calculations
Do not try this at home!
Software Tool: ENVSTD OBC version being developed
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ENVSTD Software (Version 4.0 Shown)
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OBC Version being developed Exceeding 50-60% fenestration will still be a challenge
with only envelope trade-offs
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Building Envelope Compliance Summary
84
Prescriptive Weighted U-Value / SHGC
Envelope Trade-Off
Whole Building Energy Model
FWR ≤40% ≤40% ≤40% in baseline ≤40% in baseline
Fenestration
Tables SB5.5-5 thru -7
Tables SB5.5-5 thru -7 and within same assembly type and conditioned space
Compared to Tables SB5.5-5 thru -7
Compared to Tables SB5.5-5 thru -7 and HVAC / Electrical prescriptive targets
Walls
Roof
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90.1 Section 6: 90.1 Requirements SB-10 Revisions Mostly just Canadian
Standards
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HVAC Section 6 Heating/Cooling Peformance Mandatory Minimum
Equipment Efficiencies Tables 6.8.1 A-K
Equipment not regulated by NAECA shall have permanent label stating compliance with 90.1
Equipment Minimum Efficiency
Air Conditioners COP 3.2 – 3.8
Heat Pumps COPc >3.2 COPh > 2.2
Chillers Air Cooled COP IPLV > 3.6 Reciprocating COP IPLV > 5.6 Centrifugal COP IPLV > 5.9
Furnaces > 78% AFUE or > 80% thermal efficiency
Boilers under 88 kW / 300 MBH 80% Over 733 kW / 2500 MBH 82%
Heat Rejection Axial Fan Open-circuit >3.23 L/(s-kW) Centrifugal Fan Open-circuit >1.7 L/(s-kW)
Axial Fan Closed-circuit >1.7 L/(s-kW) Centrifugal Fan Closed-circuit 0.59 L/(s-kW)
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90.1 Section 6 HVAC Controls
87
6.4.3.1.2/6.4.3.3.2 Thermostats must be capable of 3°C dead band and setback (some exceptions)
6.4.3.9 Ventilation Controls for spaces with high occupancy Demand Control Ventilation required for (some exceptions):
Spaces > 50 m² and Occupancy > 40 occ / 100m²
6.4.2.10 Single Zone Equipment Air handling and fan-coil units using chiller water with greater than 4
kW (5.4 hp) fan motors Must have variable speed controls
Air handing equipment and air-conditioner with DX cooling greater then 32 kW (9 tons) Must have 2-speed or variable speed fans
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90.1 Section 6 – Free Cooling Economizers
88
6.5.1 Have either a air-side or water side economizer, unless Less than 16 kW / 4.5 tons cooling or 40 kW / 11 tons in computer
rooms Hospitals and ambulatory surgery center with humidification (note
computer rooms humidification need not apply) System includes condenser heat recovery that meets minimum loads Residential systems where the space capacity is less than 3.2 kW /
0.9 ton Operates less than 20 hours per week Space is very leaky (infiltration) Use of outdoor air for cooling will affect supermarket open
refrigerated casework Otherwise if humidifying (above 2°C dew point) and system uses
hydronic cooling, use water side economizer
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90.1 Section 6 Humidity Control
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6.5.2.3 Dehumidification Controls shall prevent reheating, unless
System is capable of reducing total supply air by 50% or to the minimum ventilation rate (i.e. most any VAV system)
Systems serving areas with humidity controls to satisfy process needs (e.g. vivariums, museums, surgical suites, supermarkets) computer rooms excluded
6.5.2.4 Humidification If humidification above 2°C dew point and system uses
hydronic cooling, use water side economizer not an air side
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90.1 Section 6 Fan Power – Option 1: Maximum Nameplate Fan Motor Power
90
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design maximum supply airflow rate to conditioned spaces serve by the system in litres per second
Constant Volume
Variable Volume
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90.1 Section 6 Fan Power – Option 2: Maximum Input Fan Motor Power
91
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design maximum supply airflow rate to conditioned spaces serve by the system in litres per second
90.1-2010 Constant Volume with 70% ERV
90.1-2010 Variable Volume with 70% ERV
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90.1 Section 6 – Variable Fan Control
92
6.5.3.2.1 All Fan motors > 7.4 kW / 10 hp shall have one of: Variable speed drive Variable pitch blades (axial fans) Other controls capable of achieving 30% energy consumption at 50%
design flow 6.5.3.2.2 Static Pressure Sensor Location Shall be placed such that the controller setpoint is no greater than
1/3 of the design total fan static pressure If this results in the sensor being located downstream of major duct splits,
multiple sensors shall be installed 6.5.3.3 VAV system with DDC Controls Shall reduce O/A rates in response to changes to system ventilation
effectiveness, unless Exhaust air heat recovery is installed Total design exhaust is more than 70% of total design outdoor air
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90.1 Section 6 – Hydronic System
93
6.5.4.1 Systems having a total pump system power greater than 7.5 kW / 10 hp shall be variable speed Differential pressure transducer located where greatest
pressure difference will occur
6.5.4.3 Hot or Cold Water systems that exceed 88 kW (300 MBH or 25 tons) shall have supply temperature reset, except If required to have variable speed pumping Where reset causes improper operation
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90.1 Section 6 – Exhaust Air Heat Recovery
94
50% energy recovery required for most multi-zone systems
Exempt if the largest single source of
exhaust is less than 75% of O/A rate
More than 60% of outdoor air heating from site solar or site recovered energy
Operates less than 20 hr/week
% Outdoor Air at Full Design Airflow Rate
Design Supply Air Flow Rate
≥ 30% and < 40% > 2596 L/s > 5500 CFM
≥ 40% and < 50% > 2124 L/s > 4500 CFM
≥ 50% and < 60% > 1652 L/s > 3500 CFM
≥ 60% and < 70% > 944 L/s > 2000 CFM
≥ 70% and < 80% > 472 L/s > 1000 CFM
> 80% > 0 > 0
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90.1 Section 6 Service Hot Water Heat Recovery
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6.5.6.2 Condenser heat recovery for preheating/heating SHW shall be installed if all the following are true: Facility operates 24 hours / day Total installed heat rejection capacity of water cooled systems exceed
1800 kW (6150 MBH) ~ 600 tons The design SWH load exceeds 300 kW (1025 MBH) Hospitals and some large MURBs meet these requirements
Condenser heat recovery must either: Supply 60% of peak SHW load Preheat peak service hot water draw to 29°C
Exempt if: Condenser heat recovery is already employed for space heating Facilities supply 60% of DHW heating from site-solar or other site-
recovered heat recovery
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90.1 Section 7 90.1 Requirements SB-10 Revisions Canadian Standards 7.4.5.2 Heated exterior
public pools and public spas shall be equipped with a pool cover Unless 60% of their annual
heating from site-recovered or solar sources
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90.1 Section 8 8.4.2 Automatic Receptacle
Control For private offices, open office
and computer classrooms 50% of receptacles shall have
either Occupancy sensors On a schedule to turn off
during unoccupied hours Any other means to ensure
power is turned off during unoccupied hours
Exceptions where it can be shown that equipment needs to be on continuously
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90.1 Section 9 Occupant sensor or timer switch
shall be used in: Classrooms and lecture halls Conference, meeting and training
rooms Employee lunch and break rooms Storage and supply rooms (15 to 305
m²) Rooms used for document copying and
printing Office spaces up to 76 m² Restrooms Dressing, locker and fitting rooms
Exception for space With multi-scene control Shop and laboratory classrooms where automatic lights would endanger
safety or security 24-hour operation spaces
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90.1 Section 9 Lighting Power Density
99
Table 9.5.1 ASHRAE 90.1 LPD using Building Area Method 2007 2010 Reduction Building Area Type W/m2 W/m2 Automotive facility 10 8.8 12% Convention centre 13 11.6 11% Courthouse 13 11.3 13% Dining: bar lounge/leisure 14 10.7 24% Dining: cafeteria/fast food 15 9.7 35% Dining: family 17 9.6 44% Dormitory 11 6.6 40% Exercise centre 11 9.5 14% Fire station N/A 7.6 N/A Gymnasium 12 10.8 10% Health-care clinic 11 9.4 15% Hospital 13 13 0% Hotel 11 10.8 2% Library 14 12.7 9% Manufacturing facility 14 11.9 15% Motel 11 9.5 14%
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100
Table 9.5.1 ASHRAE 90.1 LPD using Building Area Method 2007 2010 Reduction Building Area Type W/m2 W/m2 Motion picture theatre 13 8.9 32% Multifamily 8 6.5 19% Museum 12 11.4 5% Office 11 9.7 12% Parking garage 3 2.7 10% Penitentiary 11 10.4 5% Performing arts theatre 17 15 12% Police/fire station 11 10.3 6% Post office 12 9.4 22% Religious builidng 14 11.3 19% Retail 16 15.1 6% School/university 13 10.7 18% Sports arena 12 8.4 30% Town hall 12 9.9 18% Transportation 11 8.3 25% Warehouse 9 7.1 21% Workshop 15 2.9 81%
Average reduction
in LPD 19%
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What about Division 4?
101
Division 4 of SB 10: if the building is within the scope of Part 9 Div B of the OBC
and, does not contain a residential occupancy, and does not use electric space heating, and, is intended for occupancy on a continuing basis during the
winter months
i.e. most Non-Residential Part 9 buildings
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Division 4 Building Envelope
102
Largely the same as the SB5-5 Tables of Division 3 Fewer climate zone, space categories, envelope types
If Vertical fenestration gross area exceeds 40% or Skylights exceed 5% Use Division 3 paths (including trade-offs and energy modeling)
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SB-10 Division 4 – Building Envelope Requirements
103
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SB-10 Division 4 – HVAC Requirements
104
Multi-zone systems Revert to Division 3 (90.1-2010 + SB10 Revisions)
Single-zone systems Use Division 3 90.1-2010 equipment performance values
Plus details on next slide…. (largely reminiscent of 90.1-2010)
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SB-10 Division 4 Single Zone HVAC Details
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(4) An air-conditioning system with a cooling capacity of 40 kW or more shall have an economizer, (a) controlled by appropriate high limit shut-off
control, and (b) equipped with either barometric or powered
relief sized to prevent excess pressurization of the building.
(5) Outdoor air dampers for economizer use shall be provided with blade and jamb seals.
(6) A heat recovery ventilator with a recovery effectiveness of 50% or more at the outside winter design temperature shall be provided where the quantity of the outdoor air supplied to the air duct distribution system is, (a) more than 1 400 L/s, and (b) more than 70% of the supply air quantity of
the system. (7) Where a heat recovery ventilator is installed,
the system shall have provisions to bypass or control the heat recovery ventilator to permit operation of the air economizer.
(8) A heating, ventilating and air-conditioning system shall be controlled by a manual changeover or dual setpoint thermostat.
(9) Except for a system requiring continuous operation, a heating, ventilating and air-conditioning system that has a cooling or heating capacity greater than 4.4 kW and a supply fan motor rated for more than 0.5 kW shall be provided with a time clock that, (a) is capable of starting and stopping the system
under different schedules for seven different day-types per week,
(b) is capable of retaining programming and time setting during a loss of power for a period of 10 hours or more,
(c) includes an accessible manual override that allows temporary operation of the system for up to two hours,
(d) is capable of temperature setback down to 13°C during off-hours, and
(e) is capable of temperature setup to 32°C during off-hours.
(10) Where separate heating and cooling equipment serves the same temperature zone, thermostats shall be interlocked to prevent simultaneous heating and cooling.
(11) A heating, ventilating and air-conditioning system with a design supply air capacity greater than 5000 L/s shall have optimum start controls.
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SB-10 Division 4 – Lighting Requirements
106
Largely taken from 90.1-2010
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Compliance Paths
107
Prescriptive Pure Prescriptive
FWR 40% or less Meet all envelope, HVAC, lighting requirement
U-Value trade-off Trade off better performing windows/walls/roof with lessor
performing
Envelope Trade-Off (for > 40% FWR) Requires ENVSTD software, 50-60% FWR is likely limit
PERFORMANCE PATHS
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Performance Path: 25% Less than MNECB
108
Requires energy modeling Same baseline as LEED Canada 1.x Similar baseline as LEED Canada 2009
LEED requires 23% energy cost savings OBC required 25% energy (GJ) savings
EE4-ecoEnergy Energy modeling software tool Automatically creates baseline building to MNECB rules
Use energy modeling as part of design process Otherwise potentially a surprise ending!
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Performance Path: 25% Less than MNECB
109
Design must comply with MNECB mandatory requirements
Reference complies with prescriptive requirements of MNECB
Overall building energy consumption proposed design vs.
reference design regulated loads only
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Performance Path: 5% Less than 90.1-2010
110
Requires energy modeling Uses 90.1 Energy Cost Budget Method (ECBM)
LEED Canada 1.0 requires 18% less than 90.1-1999 ECBM LEED Canada 2009 requires 10% less than 90.1-2004 using
Appendix G Energy Modeling Software tools
Meet the requirements of 90.1 section 11.2 Hourly tool, can model thermal mass, part load performance, etc. Tested against ASHRAE 140 standard EE4, eQuest, Trane-trace, HAP, IES, ESP-r
Currently no tool creates 90.1-2010 reference case automatically!!
Use energy modeling as part of design process Otherwise potentially a surprise ending!
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Performance Path: 5% Less than 90.1-2010
111
Design must comply with ASHRAE mandatory requirements
Reference complies with prescriptive requirements of ASHRAE 90.1-2010
Whole building energy consumption proposed design vs.
reference design regulated loads only
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Performance Path: No more than 90.1-2010 & Chapter 2 Design must comply with
ASHRAE mandatory requirements
Design must comply with Chapter 2 mandatory requirements
Reference complies with prescriptive requirements of ASHRAE 90.1-2010 & Chapter 2
Whole building energy consumption proposed design vs. reference
design regulated loads only 112
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90.1 Performance Paths Utilizes Chapter 11 of
90.1-2010 Energy Cost Budget
Method Energy modeling rules are
well defined
113
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Div 3 Ch 2 Revision to 90.1 – Feed-In Tariff
114
1.1.1.7. Energy Cost Method Sentence 11.2.3.A.(1) shall be added to Section 11.2.
”Simulation General Requirements” of ANSI/ASHRAE/IESNA Standard 90.1 11.2.3.A. Rates for Energy Supplied Back to the Grid System. Where energy generated by an on-site renewable energy source is
supplied back to the grid system, for the purpose of Section 11, Energy Cost Budget Method, the rates for the energy supplied back to the grid system shall be assumed to be equal to the rates paid for the same type of purchased energy from the grid system.
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OBC SB-10 Enforcement?
115
Remains to be seen But prior to Jan 1 in SB-10
envelope, window, lighting targets were set energy modeling was a compliance path building envelope trade-off was a compliance path
Ministry has new checklists developed (ask me how I know that)
Greater attention has been paid over the last 12 months
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90.1-20XX Impact on the Market Product suppliers are
paying attention
116
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www.enermodal.com
Closing Quotes
117
Ludwig Wittgenstein (engineer, mathematician, philosopher) “I don't know why we are here, but I'm pretty sure that it is not in
order to enjoy ourselves.”
W.H. Auden (poet) “We are all here on earth to help others; what on earth the others
are here for I don't know.”
Kurt Vonnegut (writer) "We are put on earth to fart around....don't let any one tell you any
different."
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118