BC Comfort: ASHRAE 90.1 2010 Overview - December 2013 Presentation

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ASHRAE stands for American Society of Heating, Refrigerating and Air-Conditioning Engineers. It is an HVAC society that aims to advance the arts and sciences of heating, ventilating, air conditioning and refrigerating.

This presentation discusses the new energy standards based on ASHRAE 90.1 2010, which gives 30% energy savings compared to ASHRAE 90.1-2004, to provide minimum requirements for the energy-efficient design of buildings except low-rise residential buildings.

The 6 Key Topics that will be discussed are:
1. ASHRAE 90.1 Overview
2. Compliance Paths
3. Implementation Cost
4. Envelope
5. HVAC
6. Lighting/Power


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  • Thanks everyone for sitting in our presentation. We understand your time is valuable and appreciate all of you joining us here.Feel free to help yourself to lunch during the presentation. Hope we can keep this presentation informative, but not overhelm all of you with information.
  • These are the six items we are going through in the next hour. Here’s a handout with all key points
  • 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.
  • Required pretty much for any building.
  • Economizer have been standard practice by BCC, but make sure your mech contractor is including this.
  • Process loads (e.g. Server rooms) are now in the scope. Can make a big difference during energy modeling and was previously excluded.
  • 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 Overview - December 2013 Presentation

    1. 1. ASHRAE 90.1-2010 Overview December 13th, 2013
    2. 2. YOUR CONTACTS • Henry Leung, P.Eng., MBA, LEED AP Senior Design Engineer
    3. 3. AGENDA 1. 2. 3. 4. 5. 6. ASHRAE 90.1 Overview Compliance Paths Implementation Cost Envelope HVAC Lighting/Power
    4. 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. 5. National Energy Code for Canada i.e. Canadian ASHRAE 90.1
    6. 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. 7. COST
    8. 8. ENVELOPE
    9. 9. Envelope
    10. 10. Envelope
    11. 11. 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  Alterations to envelope cavities  Replacement of existing provided they are insulated to full fenestration, provided area of depth with a nominal R-3.0 per in. replacement is no more than 25% of total fenestration area  Roof and floor alterations where no new cavities are created
    12. 12. 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
    13. 13. 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
    14. 14. 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
    15. 15. HVAC 1. Economizers required for > 4 ton RTU 2. Energy Recovery > 5000 CFM units
    16. 16. PROCESS LOADS • Un-regulated Energy Uses now in Scope
    17. 17. 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.
    18. 18. SECTION 6 – 6.4.3.4.5 ENCLOSED PARKING GARAGE VENTILATION Ventilation systems in enclosed parking garages  automatically detect contaminant levels and stage fans or  modulate fan airflow rates to ≤ 50%, provided acceptable contaminant levels are maintained Exception  Garages < 30,000 ft2 with ventilation systems that use mechanical cooling or heating  Garages with a garage area to ventilation system motor nameplate hp ratio > 1500 ft2/hp and don’t use mechanical cooling or heating  Where permitted by AHJ
    19. 19. LIGHTING • Lighting alteration requirements take effect at 10% replacement • Include exterior areas • Include renovations even when it is just lamp/ballast replacement
    20. 20. 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
    21. 21. 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
    22. 22. 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
    23. 23. 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
    24. 24. 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
    25. 25. THANK YOU Henry Leung, P.Eng., MBA, LEED AP hleung@bccomfort.com 604-412-0206

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