BC Comfort ASHRAE 90.1 2010 Envelope Highlights (Christopher Boyzk Architects)- January 2013 Presentation
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BC Comfort ASHRAE 90.1 2010 Envelope Highlights (Christopher Boyzk Architects)- January 2013 Presentation

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THE Energy Standard. Ratings for envelope, HVAC equipment, power, lighting levels. Copied by Canada (National Energy Code), referenced by the rest of the world. Still not in effect in Alberta, but it ...

THE Energy Standard. Ratings for envelope, HVAC equipment, power, lighting levels. Copied by Canada (National Energy Code), referenced by the rest of the world. Still not in effect in Alberta, but it is in effect in various forms in most of the US.

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  • Based on a study commissioned by Office of Housing and Construction Standards. Joint venture between Stantec and BTY (QS). Not significant cost<1% increase in cost.Makes sense, because many of the items asked for in the code are already in effect. E.g. RTUs/boilers sold are already quite high efficiency. Walls are regularly well insulated. Low-E glazing is becoming more standard. However, I think this study is optimistic.
  • Table gives a layout of the insulation values before and after the new code. All Walls are overall assembly. i.e. to achieve R15, you will need R20+ insulation between studsMass: Concrete Wall, e.g. Tilt up concreteSteel-Framed: Wall with cavity (with insulation)Wood-framed: same, but with wood.VBBL requires slightly more stringent values.
  • Table gives a layout of the insulation values before and after the new code. All Walls are overall assembly. i.e. to achieve R15, you will need R20+ insulation between studsMass: Concrete Wall, e.g. Tilt up concreteSteel-Framed: Wall with cavity (with insulation)Wood-framed: same, but with wood.VBBL requires slightly more stringent values.
  • Table gives a layout of the insulation values before and after the new code. All Walls are overall assembly. i.e. to achieve R15, you will need R20+ insulation between studsMass: Concrete Wall, e.g. Tilt up concreteSteel-Framed: Wall with cavity (with insulation)Wood-framed: same, but with wood.VBBL requires slightly more stringent values.
  • Required pretty much for any building.
  • Economizer have been standard practice by BCC, but make sure your mech contractor is including this.
  • Tables 6.8.1A – 6.8.1Ki.e. Replacement equipment may be larger and be more expensive than what was originally installed.e.g. water source heat pumps at UBC SPPHNew heat pump chassis was significantly larger than old 20 year units.
  • Previously 50% threshold for replacement.
  • 25% reduction in some cases, but more like 10% in most cases.
  • Intent:Eliminate after hours lighting wasteAreas with safety – always an issue
  • All Building Permits issued after December 20th, 2013 will require compliance to ASHRAE 90.1-2010.

BC Comfort ASHRAE 90.1 2010 Envelope Highlights (Christopher Boyzk Architects)- January 2013 Presentation Presentation Transcript

  • 1. ASHRAE 90.1-2010 Envelope Highlights January 7th, 2013
  • 2. YOUR CONTACTS • Henry Leung, P.Eng., MBA, LEED AP Senior Design Engineer • Amir Tehrani, P.Eng., LEED AP Contract Manager, Partner
  • 3. AGENDA 1. ASHRAE 90.1 Overview 2. Compliance Paths 3. Cost 4. Envelope 5. Mechanical 6. Electrical
  • 4. OVERVIEW To provide minimum requirements for the energyefficient design of buildings except low-rise residential buildings 30% Energy savings compared to ASHRAE 90.1-2004
  • 5. National Energy Code for Canada 2011 i.e. Canadian ASHRAE 90.1
  • 6. Compliance Approaches Building System Compliance Options Prescriptive Option Envelope HVAC Mandatory Provisions SWH (required for most compliance options) Power Trade Off Option Energy Cost Budget Lighting Other Simplified Energy Code Compliance
  • 7. LEED • LEED Canada NC 2009 - Valid until at least 2015 1. ASHRAE 90.1-2007 2. MNECB 1997 • LEED v4 1. ASHRAE 90.1-2010 2. maybe NECB 2011
  • 8. COST
  • 9. ENVELOPE
  • 10. SECTION 5 ABOVE-GRADE WALL INSULATION Four types of walls are defined  Mass walls – heat capacity determined from Table A3.1B or A3.1C – R-value is for continuous insulation or when uninterrupted by framing other than metal clips no closer than 24 in. o.c. horizontally and 16 in. o.c. vertically  Metal building wall R-value – for insulation compressed between metal wall panels and the steel structure  Steel-framed wall R-value – for uncompressed insulation installed in the cavity between steel studs  Wood-framed and other R-value – for uncompressed insulation installed in the cavity between wood studs; also acceptable to be continuous insulation uninterrupted by studs
  • 11. ENVELOPE
  • 12. Section 5 Envelope Alteration Exceptions Allowed if they don’t increase energy usage of building  Installation of storm windows  Replacement of glazing in existing sash and frame  Replacement of roof membranes  Replacement of existing doors  Replacement of existing  Alterations to envelope cavities fenestration, provided area of provided they are insulated to full replacement is no more than depth with a nominal R-3.0 per in. 25% of total fenestration area  Roof and floor alterations where no new cavities are created
  • 13. Envelope
  • 14. Envelope
  • 15. SECTION 5 – 5.5.4.2.3 SKYLIGHT FENESTRATION AREA Skylights are required in enclosed spaces that are • ≥ 5,000 ft2 and • Ceiling heights > 15 ft and • Space types – Office - Convention Center – Transportation – Lobby - Automotive Service – Workshop – Atrium - Manufacturing – Concourse - Non-refrigerated Warehouse – Corridor - Retail – Storage - Distribution/Sorting Area – Gymnasium/Exercise Center
  • 16. SECTION 5 – 5.5.4.2.3 SKYLIGHT FENESTRATION AREA Total skylight area is either: • Minimum of 3% of roof area with a skylight VLT at least 0.40 OR • Such that the daylight area under skylights is a minimum of half the floor area and provides a minimum skylight effective aperture of at least 1% Exceptions • Climate zones 6-8 • Spaces with LPDs < 0.5 W/ft2 • Shaded spaces • Daylight area under rooftop monitors is > 50% of floor area • Documented that 90% of skylight area is shaded on June 21 (Northern Hemisphere)/December 21 (Southern Hemisphere) at noon by permanent features • Required daylight area under skylights may be reduced by amount of: • primary sidelighted area with sidelighting effective aperture > 0.15 • secondary sidelighted area with sidelighting effective aperture > 0.30 with general lighting controlled by continuous daylight dimming
  • 17. SECTION 5 – 5.5.4.5 FENESTRATION ORIENTATION Vertical fenestration area to meet this requirement: Area South ≥ Area West and Area South ≥ Area East N No! Yes! Exceptions: • Buildings shaded by other buildings within 20 ft to the south which is at least ½ as tall as the proposed building • Buildings with shade on 75% of the west and east • Alterations and additions that don’t increase vertical fenestration area
  • 18. HVAC 1. Economizers required for > 4 ton RTU 2. Energy Recovery > 5000 CFM units
  • 19. SECTION 6 – 6.4.1.1 MINIMUM EQUIPMENT EFFICIENCY HVAC Equipment Covered            Air conditioners and condensing units Heat pumps (air, water, and ground source) Water-chilling packages (chillers) Packaged terminal and room air conditioners and heat pumps Furnaces, duct furnaces and unit heaters Boilers Heat rejection equipment (cooling towers) Heat transfer equipment (heat exchangers) Variable refrigerant flow (VRF) air conditioners VRF air-to-air and applied heat pumps Air conditioners serving computer rooms
  • 20. SECTION 6 – 6.4.3.9 (6.3.2Q) DEMAND CONTROL VENTILATION DCV must be provided for each zone with a area > 500 ft² and the design occupancy > 40 people/1000 ft² where the HVAC system has:  An air-side economizer,  Automatic modulating control of the OSA dampers, or  A design outdoor airflow > 3,000 cfm Demand control ventilation (DCV): a ventilation system capability that provides for the automatic reduction of outdoor air intake below design rates when the actual occupancy of spaces served by the system is less than design occupancy.
  • 21. LIGHTING • Lighting alteration requirements take effect at 10% replacement • Include exterior areas • Include renovations even when it is just lamp/ballast replacement
  • 22. SECTION 8 – 8.4.2 AUTOMATIC RECEPTACLE CONTROL ≥ 50% of all 125 volt 15- and 20-amp receptacles (including those in modular partitions) must be controlled by an automatic control device in these space types  Private offices  Open offices  Computer classrooms Exceptions  Receptacles designated for equipment requiring 24 hr operation  Spaces with security or safety concerns Automatic control devices must function on:  Time-of-day controller provided to control ≤ 25,000 ft2 and not more than one floor  Occupant sensor to turn off receptacles within 30 minutes of occupant leaving the space  Signal from another control or alarm that indicates the area is unoccupied
  • 23. SECTION 9 - 9.4.1 MANDATORY AUTOMATIC SHUTOFF Automatic lighting shutoff control device required EXCEPT:  Lighting for 24-hour operation  Patient care spaces  Areas with safety or security concerns Compliance options: Control lights on a scheduled basis (automatic time switch)  Time-of-day controller  Controls ≤ 25,000 ft2 and not more than one floor Occupant sensor  Turn lights off within 30 minutes of occupant leaving the space Signal from another control or alarm that indicates the area is unoccupied
  • 24. SECTION 9 – 9.4.1.2 MANDATORY: INDIVIDUAL SPACE CONTROL  At least one for each room or space enclosed by ceiling-height partitions – To have at least one control step between 30% and 70% (inclusive) of full lighting power in addition to all off • Exceptions: – Lighting in corridors, electrical/mechanical rooms, public lobbies, restrooms, stairways, and storage rooms – Spaces with only 1 luminaire with rated input power < 100W – Space types with lighting power allowance of < 0.6 W/ft2 – in spaces ≤ 10,000 ft2, each control serves 2,500 ft2 maximum and in spaces > 10,000 ft2, serves 10,000 ft2 maximum  Readily accessible to occupants  Override of any time-of-day control for no more than 2 hours  Remote location is allowed to accommodate areas where safety or security is a concern
  • 25. SECTION 9 – 9.4.1.2 MANDATORY INDIVIDUAL SPACE CONTROLS Occupancy sensors are required in:  Classrooms and lecture halls  Conference, meeting, and training rooms  Employee lunch/break rooms  Storage and supply rooms between 50 ft2 and 1000 ft2  Rooms used for document copying and printing  Office spaces < 250 ft2  Restrooms  Dressing, locker, and fitting rooms Exceptions: – Spaces with multi-scene control systems – Shop and lab classrooms – Areas with safety or security concern – Lighting required for 24 hour operation
  • 26. SECTION 9 – 9.4.1.3 PARKING GARAGE LIGHTING CONTROL Parking garage lighting to be automatically controlled, including daylighting • Must reduce lighting power by minimum of 30% when no activity detected for no more than 30 minutes within a lighting zone ≤ 3,600 ft2 • Daylight transition zone lighting – Controlled separately to automatically turn on lighting during daylight hours and off at sunset • Automatically reduce power in response to daylight for luminaires within 20 ft of any perimeter wall that has – a net opening to wall ratio of ≥ 40% and – no exterior obstructions within 20 ft Exceptions • Daylight transition zones and ramps without parking are exempt from 30% reduction and daylight control • Applications using HID of 150W or less or induction lamps are exempt from 30% reduction
  • 27. THANK YOU Henry Leung, P.Eng., MBA, LEED AP hleung@bccomfort.com 604-412-0206