Who doesn’t want more glass? The latest version of Ontario’s Building Energy Code, SB-10, limits the amount of glazing to 40%. SB-10 includes 3 prescriptive paths to compliance. All prescriptive solutions permit trade-offs and require them to be determined with approved software. Gerry Conway will walk you through a project using a simple compliance tool, COMcheck, by which designers may determine effective R or U values and perform simple trade-offs. The trade-offs may be used to increase the allowable glazing above the 40% threshold. COMcheck is free, has the latest version of SB-10 built in, promotes collaboration with others on the project team through a web-based user interface and is well documented. With it the user may prepare a standalone compliance report for the building envelope or a complete building report covering all disciplines. COMcheck compliance reports are acceptable to ASHRAE and most authorities. Gerry is an Ottawa based Architect whose practice is focused on building science, technology, codes, standards, practice tools, quality assurance and building envelope/energy performance. He fervently believes in a holistic approach to Architecture where beauty, utility and technology are harmoniously synthesized. Gerry sits on the Engineers, Architects and Building Officials committee, the Coordinating Licensed Professional PEO-OAA Joint Task Group and the Board of BECOR. In 2017 he represented the OAA on the OBC Part 3 Technical Advisory Committee which included discussions regarding changes to Ontario’s Energy Code SB-10. Gerry is a member of the OAA, past member of the American Institute of Architects and is a fellow of the RAIC.

1. SPARC 2019
SB-10,
Prescriptive Trade Off
Compliance
COMCheck
1 OAA Con-Ed Structured Hour
Gerry Conway
OAA, FRAIC, LEED AP

2. SPARC 2019
• COMcheck Compliance & Trade-off
Tool to increase glazing to Code +
10%
Outline

3. OAA FESTIVAL 2019
COMcheck
by
Pacific Northwest National Laboratory
90.1 Compliance &
Trade-off option

4. SB-10
•∑ 𝒏 𝑼𝒊𝒑 𝑨𝒊𝒑 ≤ ∑ 𝒏 𝑼𝒊𝒓 𝑨𝒊𝒑
• Some caveats:
– The FDWR and SRR of the
reference building must =
that of the proposed
building.
– You can’t trade walls with
roofs
Simple
Trade-Off Path

5. SB-10

6. COMcheck
• Energy Code validation/trade-off
• OBC Part 3 buildings
• OBC Part 9 non-residential
• Includes OBC SB-10 2017
• Acceptable for ASHRAE 90.1 2013
• Easy to Use & Flexible

7. COMcheck
• Calculates Effective U
• Trade-offs within classes
• Consultant Collaboration
• Well Documented and
• Its Free
,
Enable E

8. COMcheck
• Not whole building simulation
• Does not include NECB

9. COMcheck
• Design Flexibility
• Increase Glazing > 40%
• Test Design Options
• Demonstrate Compliance

10. COMcheck
• Understand Framework,
• Learn to use COMcheck Web
envelope,

11. COMcheck

12. COMcheck
Orientation

13. COMcheck
OBC SB10 Tables 5.5-5-7
Vertical Fenestration: 40% of Wall
Wall: that portion of the building envelope,
including opaque area and fenestration, that
is vertical or tilted at an angle of 60 degrees
from horizontal or greater. This includes
above and below-grade walls, between floor
spandrels, peripheral edges of floors, and
foundation walls.ASHRAE 90.1 2013
Wall Area

14. COMcheck
• Set orientation ON if:
• Set to OFF if any exemptions apply
,
Enable E
Orientation

15. COMcheck
1.Shading Devices
2.Shading on the South
3.Shading on the East or West
4.Alterations and additions
5.East glazing area < 20% East
Facade area & West glazing area
< 20% West Façade area & SHGC
< 90% Code
6.Zone 8
Exemptions

16. COMcheck
Office
100’ x 100’
10 Storeys + 1 Bsmt.
GFA: 110,000 SF
Roof: 10,000 SF
Walls: 44,000 SF
44% ≈ 19,000 SF
AW≤AT/4 & AE≤AT/4

17. COMcheck
,
Enable E

18. COMcheck

19. COMcheck
,
Enable E

20. COMcheck

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30. COMcheck

31. COMcheck

32. COMcheck

33. COMcheck

34. SB-10
Effective U
Double Glazing
Usys: -10%
Ucog: -20%
.38(2.15)
90%
.30(1.7)
.24(1.4)
.34(1.93)

35. COMcheck Web
Effective U
Double Glazing
Ucog: 0.24 <0.25
SHGC: .39 < .4
VLT : 1.79>1.1
SHGC
1.79 > 1.1

36. COMcheck

37. COMcheck

38. COMcheck

39. COMcheck

40. COMcheck

41. COMcheck

42. COMcheck

43. COMcheck

44. COMcheck

45. COMcheck

46. SPARC 2019
• COMcheck Compliance & Trade-off
Tool to increase glazing to Code +
10%
Review

47. SPARC 2019
Links

48. SPARC 2019
the End?
I certainly
hope not.
Image by Astronaut Ron Garan aboard ISS

49. SB-10
• ASHRAE Standard 90.1-2010, +
5% + 13%
• National Energy Code of
Canada for Buildings 2011 +
Division 2, Chapter 3 + 13%
• ASHRAE Standard 90.1-2010, +
Division 2, Chapter 2 + 13%
Part 3
Buildings
Performance
Solutions

50. SB-10
• SB-10 at Concept Design
• HDD18 for your location: SB-1
• Fenestration Impact on Energy
Use.
• Curtain wall spandrels are
opaque elements.
• Envelope Impact on M&E.
• Models require Prescriptive
Values.
Basics

51. SB-10
• U: Thermal Transmittance
W/m²C⁰ 1 Btu/hr-sq. ft F⁰ = 5.678
W/m²C⁰
• R = Thermal Resistance = m²•K⁰/W =
1/U
• F: Perimeter Heat Loss Factor for
SoG in W/m C⁰
• In all energy codes the above are
effective values, not nominal
values.
• PPL: Parallel Path Losses
Basics

52. SB-10
U = Thermal
Transmittance
W/m²•K ⁰ = 1/R

53. SB-10
Effective
U, C & R
Opaque
Assemblies
EE4
5.5
4.3

54. SB-10
Effective
U, C & R
Opaque
Assemblies
ASHRAE 90.1
Appendix A

55. SB-10
Parallel
Path
Losses
Image from PhotoBucket

56. SB-10
SB-10 2017
Div. 3, Chap. 2
Zone 5 IP

57. SB-10
SB-10 2017
Div. 3, Chap. 2
Zone 5 IP
Usys: 0.38 (2.15)
max.

58. SB-10
Effective U
Fenestration
Usys : 0.38 (2.15)
90% vision
Ucog: 0.25 (1.4)
0.38(2.15)
90%
0.25 (1.4)

59. SB-10
Effective U
Double Glazing
Ucog = 0.24 < 0.25
SHGC = .22 < .4
VLT/SHGC
1.45 > 1.1

60. SB-10
• ASHRAE Standard 90.1-2013 +
Division 3, Chapter 2,
• ASHRAE Standard 189.1-2014 ,
Section 7
• National Energy Code of
Canada for Buildings 2015 +
Division 3, Chapter 3.
Part 3
Buildings
Prescriptive,
Trade-Off &
Performance
Solutions

61. SB-10
• Are you exempt? See 1.2.1.1
• Determine the areas of Wall,
Roofs, Exposed Floors,
Windows, Doors and Skylights
• Read SB-10 and ASHRAE 90.1,
NECB or ASHRAE 189.1
• Is the Building Airtight?
Prescriptive
Procedure

62. SB-10
• Use HDD18 in SB-1 for Zone
• % Structural Penetrations
• Record and distribute required
U, C, F and R
• Select assemblies factoring in
U, C, F, R and Parallel Path
Loses
Prescriptive
Procedure

63. SB-10
• Design Building = Reference
Building
• ASHRAE 90.1 Appendix C
• Software required
– Revit Insight 360
– CAN-Quest for NECB
– COMcheck for ASHRAE 90.1
– And others
Simple
Trade-Off
Procedure

64. SB-10
ASHRAE
90.1 2013 +
SB-10 2017
Div. 3, Chap. 2
Prescriptive
Solution

65. SB-10
SB-10 2017
Div. 3, Chap. 2
Zone 5 SI