Download to read offline
Uploaded byXiangyang Tan
Energy efficient for part 9 buildings and city bylaws
The document discusses the BC Building Code 2012 and ASHRAE 90.1-2010 energy standards. It provides an introduction to the presenter and their qualifications. It then outlines the key compliance approaches and mandatory provisions for building envelopes in both codes, including requirements for insulation, air barriers, fenestration, skylights and fenestration orientation. Prescriptive requirements are discussed for opaque elements, below-grade walls, slab-on-grade floors and fenestration.
More Related Content
Similar to Energy efficient for part 9 buildings and city bylaws
Energy efficient for part 9 buildings and city bylaws
- 1. BUILDING CODE AND ENERGYSTANDARD DISCUSSION OF BC BUILDING CODE 2012 AND ASHRAE 90.1-2010 TAN, XIANGYANG P.ENG., LEEDAP., M.S.Ac. Senior Mechanical Engineer WECHAT: 37180531 E-mail: [email protected] C: 778-706-5858 T. 604 525-3341 ext. 115
- 2. Introduction of Presenter -10 years working in china as HVAC/plumbing/fire protection engineer/ architect - 10 year working in Canada as mechanical engineer - Master in architecture in Belgium - Master in building engineering in Canada - Designed more than 200 large size buildings across west china and Canada - Registered engineer in British Columbia and Alberta
- 3. PART 10 OF BCBC2012 ASHRAE 90.1- 2010 ENERGY STANDARD 3
- 4. ENVELOPE HVAC SWH POWER LIGHTING OTHER BUILDING SYSTEM Mandatory Provisions (Required for Most Compliance Options) Prescriptive Option TradeOff Option Energy Cost Budget Simplified Energy Code Compliance BUILDING SYSTEM Compliance Approach 4
- 5. Building Envelope Overview •General (Section 5.1) o Scope o Space Conditioning Categories o Envelope Alterations o Climate • Compliance Paths (Section 5.2) • Simplified Building (Section 5.3) (Not Used) • Mandatory Provisions (Section 5.4) o Insulation o Fenestration and Doors o Air Leakage 5
- 6. BC Building Codeand National Building Code Commercial 90.1-2010 Residential BCBC Part 9.36 6
- 7. Section 5 –5.1.2 Building Envelope Scope Envelope Components that enclose • Conditioned space • Semi-heated space • Heating capacity > 3.4 btu/h.ft2 but not conditioned space ( design temperature is 15 degC, i.e. crawl space) • Approved by local official 7
- 8. COMcheck Option • Thisoption can used to demonstrate compliance with ASHARE 90.1-2010 • User inputs all building data • Will show if building can meet performance or tradeoff based compliance • When used, report shall be submitted with construction documents. 8
- 9. ENVELOPE HVAC SWH POWER LIGHTING OTHER BUILDING SYSTEM Mandatory Provisions (Required for Most Compliance Options) Prescriptive Option TradeOff Option Energy Cost Budget Simplified Energy Code Compliance BUILDING SYSTEM Compliance Approach 9
- 10. Section 5 -5.4 MandatoryProvisions • Fenestration and Doors (Section 5.8.2) • Air Leakage (Section 5.4.3) 10
- 11. Section 5 -5.4.3.1Air Leakage - Continuous Air Barrier • Continuous Air Barrier required except in semi-heated spaces. • Plans • Air Barrier component identified or noted in construction documents • Joints, intersections and penetrations of air barrier components (including lighting fixtures) detailed • Extends over all surface of thermal envelope • Lowest floor, exterior walls, and ceiling or roof • Resists positive and negative pressures 11
- 12. Section 5 -5.4.3.2AirLeakage - Air Barrier Installation • Wrap, Seal, Caulk, Gasket orTape • Joint around fenestration and door frames (both manufacturer and site built) • Junctions between walls • And foundations • At building corners • And roof or ceilings • Penetrations for roofs, walls and floors • Building assemblies used as ducts or plenums. • Joints, seams, connections between planes and other changes in air barrier materials. 12
- 13. Section 5 -5.4.3.2Air Leakage - Acceptable Air Barrier Materials and Assemblies 13 1. Plywood-minimum 3/8 in. 2. Oriented strand board-minimum 3/8 in. 3. Extruded polystyrene insulation board-minimum 1/2 in. 4. Foil-faced urethane insulation board-minimum 1/2 in. 5. Exterior gypsum sheathing or interior gypsum board-minimum 1/2 in. 6. Cement board-minimum 1/2 in. 7. Built up roofing membrane 8. Modified bituminous roof membrane 9. Fully adhered single-ply roof membrane 10. A Portland cement/sand parge, stucco, or gypsum plaster-minimum 1/2 in. thick 11. Cast-in-place and precast concrete. 12. Sheet metal. 13. Closed cell 2lb3/ft nominal density spray polyurethane foam-minimum 1 in.
- 14. Vapour Barrier –not part of ASHRAE 90.1 14
- 15. Typical Wood FrameWall 15
- 16. Section 5 –5.4.3.2 Air Leakage – Fenestration and Doors 16 Products Cfm/sqft PSF Procedure Glazed swinging entrance doors and revolving doors 1.0 1.57 AAMA/WDMA/CSA 101/I.S.2/A440, NFRC 400, or ASTM E283 Curtainwall and storefront glazing 0.06 1.57 NFRC 400 or ASTM E283 Unit skylights with condensation weepage openings 0.3 1.57 AAMA/WDMA/CSA 101/I.S.2/A440, NFRC 400, or ASTM E283 Non-swinging opaque doors 0.4 1.57 ANSI/DASMA 105, NFRC 400, or ASTM E283 All other products 0.2 1.57 AAMA/WDMA/CSA 101/I.S.2/A440 or NFRC 400
- 17. Section 5 –5.4.3.3 Load Dock Weatherseals 17 In climate zones 4 through 8, cargo doors and loading dock doors shall be equipped with weatherseals to restrict infiltration when vehicles are parked in the doorway.
- 18. Section 5 –5.4.3.4 Air Leakage Vestibules 18 Required in Climate Zones 4 to 8 for entrances in buildings > 1000 ft2 Vestibules must have Self-closing doors Interior and exterior doors not open at the same time Distance between interior and exterior doors >=7 ft when in closed position (remember ADA!)
- 19. Section 5 –5.4.3.4 Air Leakage Vestibules Exceptions 19 Exceptions Non-entrance doors Building entrances with revolving doors All entrances in buildings < 1000 ft 2 in Climate Zone 4 All doors that open from spaces < 3000 ft 2 (separate from building entrance) Doors from dwelling units
- 20. ENVELOPE HVAC SWH POWER LIGHTING OTHER BUILDING SYSTEM Mandatory Provisions (Required for Most Compliance Options) Prescriptive Option TradeOff Option Energy Cost Budget Simplified Energy Code Compliance BUILDING SYSTEM Compliance Approach 20
- 21. Section 5 –5.5 Prescriptive Building Envelope Option 21 Rules Window/Wall Ratio ≤ 40% of gross wall area (IECC 30%) Skylight-roof Ratio ≤ 5% of roof area Each envelope component must separately meet requirements Criteria sets for 8 different climate types Z5 = single page that summarizes all prescriptive requirements – Insulation levels for roofs, walls, floors – Fenestration criteria
- 22. 22 Section 5 –5.5 Prescriptive Building Envelope Option Opaque Elements
- 23. 23 Part 9.36 ofBCBC 2012 As comparsion R50 R27 R18 R27
- 24. 24 Part 9.36 ofBCBC 2012 As comparison R39 R17 R27 R27
- 25. 25 Section 5 –5.5 Prescriptive Building Envelope Option -Fenestration
- 26. 26 Section 5 –5.8.1 Insulation Installation Per manufacturer’s instructions Achieve rated R-value No open-blown or poured loose-fill insulation when ceiling slope is > 3/12 If eave vents installed – Provide baffling of air vents to deflect incoming air above the surface of the insulation
- 27. 27 Section 5 –5.8.1 Above-Grade Wall Insulation Four types of walls are defined: Mass Walls (Concrete wall, block wall) • -Heat Capacity:Table A3.1 B or A3.1C • -R-value is for continuous insulation Metal building wall R value • - Insulation compressed between metal wall panels and steel structure Steel framed wall R-value • Uncompressed insulation installed in the cavity between steel studs Wood-frame and other R-value Uncompressed insulation installed in the wood stud cavities, also continuous insulation uninterrupted by studs
- 28. 28 Section 5 –5.5.3.3 Below-Grade Wall Insulation Meet or exceed values in appropriate table for climate zone R-value is for continuous insulation Exceptional If framing is used, compliance is based the maximum assembly C-factor C-factor (thermal conductance): Unit of C-factor is BTU/h.ft2.oC (W.m2.oC)
- 29. 29 Section 5 –5.5.3.5 Slab-on-grade Floor Insulation Meet or exceed values in appropriate table for climate zone Be installed around the perimeter to the distance specified: Inside foundation wall: extend from the slab to top of footing Outside foundation wall – extend from top of the slab to bottom of slab and horizontally to a minimum distance specified.
- 30. 30 Section 5 –5.5.4 Fenestration Criteria apply to fenestration (from Latin Window), including windows, glass door, glass block, plastic panels, skylight and rooftop monitors Compliance path - <= Maximum U factor in table - >= Minimum SHGC in table - Use NFRC rating of default values in AppendixA SHGC values ranges from 0 to 1, a lower value representing less solar gain. NFRC National Fenestration Rating Council
- 31. 31 Section 5 –5.5.4.2 Fenestration Area Vertical fenestration area <=40% of gross wall area Skylight <= 5% of gross roof area
- 32. 32 Section 5 –5.5.4.2 Fenestration Area Skylights are required in enclosed spaces that are • >= 5,000 ft2 area and • >15 ft ceiling height and • One of these space types Office Convention Center Transportation Lobby Automotive service Workshop Atrium Manufacturing Concourse Non-refrigerated warehouse Corridor Retail Storage Distribution area Gymnasium/exercise center
- 33. 33 Section 5 – SolarHeat Gain Coefficient (SHGC) SHGC =0 means no heat gain through window SHGC=1 means 100% heat gain through window A typical double pane window SGGC is 0.70 NFRC 200 Standard
- 34. 34 Section 5 –5.5.4.4.1 SHGC exceptions Overhangs SHGC =0 means no heat gain through window SHGC=1 means 100% heat gain through window Exceptions: - Projection Opaque shading - Partially opaque project (Perforated metal) - Street side fenestration at street level
- 35. 35 Section 5 –5.5.4.4.2 Skylight SHGC Skylights SHGC values <Table value for appropriate total skylight area Exceptions, if skylights: - If a glazing material or diffuser with measure haze value >90% when tested according to ASTM D1003. - Have a skylightVT>0.40, and - Have all general lighting in daylight area under lights controlled by multilevel photo-controls per section 9.4.1.5 DynamicGlazing - Minimum SHGC is used to demonstrate compliance - Considered separately from other vertical fenestration - Area weighted averaging with other vertical fenestration that isn’t dynamic glazing isn’t allowed.
- 36. 36 Section 5 –5.5.4.5 Fenestration Orientation Vertical Fenestration area to this requirement: Area south >= Area west and Area South>= Area East Exceptions: - Building shaded by other buildings with 20ft to south which is at ½ as tall as the proposed building. - Building with shade on 75% of the west and east - Alterations and additions that do not increase vertical fenestration area
- 37. ENVELOPE HVAC SWH POWER LIGHTING OTHER BUILDING SYSTEM Mandatory Provisions (Required for Most Compliance Options) Prescriptive Option TradeOff Option Energy Cost Budget Simplified Energy Code Compliance BUILDING SYSTEM Compliance Approach 37
- 38. 38 Section 5 –5.6 Building Envelope Trade-off Option Building complies if • It satisfies the provisions of 5.1-General, 5.4-Mandatory Provisions, 5.7-Submittals and 5.8-Product information and installation requirements, and • The EPF (Envelope Performance Factor) of proposed building is <= EPF of budget building • EPF considers only the building envelope components and is calculated using procedures in Normative Appendix C. • Schedules of operation, lighting power, equipment power, occupant density, and mechanical systems to be the same for both the proposed building and the budget building.
- 39.
- 40.
- 41. 41 Section 5 VisibleTransmittance Determined in accordance with ASTM E972 A measure of amount of visible light that passes through fenestration Affected by • Composition of the glass • Coatings • Internal shading devices Relationship betweenVT and SHGC - Daylighting without excessive solar gain –VT at least 1.2x SHGC Exception - For skylights not within scope of NFRC 200,VT to e solar photometric transmittance of skylight glazing material in accordance with ASTM E972.
- 42. R VALUE FOR RESIDENTAIL BUILDING LESSTHAN 5 STOREYS VANCOUVER ATTIC ROOF: RSI7.0 (R40) WALL: RSI 3.5 (R20) 42
- 43. VANCOUVER ATTIC ROOF: RSI5.3 (R30) WALL: RSI3.5 (R20) R VALUE FOR NON- RESIDENTAIL BUILDING 43
- 44. Group C: ResidentialBuilding 44
- 45.
- 46. BC BUILDING CODE2012 Energy Efficiency Requirements 46