BC Comfort Fusion ASHRAE 90.1 2010 January 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 …

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

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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.
  • Let me tell you a bit about BC Comfort –Full Service Design-Build Mechanical Contracting & EngineeringHVAC, Controls(BMS), Plumbing, Engineering, Service/Maintenance all in-house - There currently no other competitor in the BC market with all of these services)Fully BIM capable. ( we have in house BIM software and designer)75% of our projects are handled in the Design-Build delivery methodBeen in business from 197280% of our clients have been working with us longer than 10 years2 Mechanical Engineers on the staff, 2 LEED certified 2 Offices in BC, one in the Lower Mainland and one in the Okanagan Organization and Safety system in placeOQM certified by APEGBC
  • 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.
  • Skylights, Vestibules, Orientation requirement
  • Section 11 - simulation
  • 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.
  • All Building Permits issued after December 20th, 2013 will require compliance to ASHRAE 90.1-2010.

Transcript

  • 1. FUSION PROJECTS ASHRAE 90.1-2010 Overview January 14th, 2013
  • 2. YOUR CONTACTS • Henry Leung, P.Eng., MBA, LEED AP Senior Design Engineer • Amir Tehrani, P.Eng., LEED AP Contract Manager, Partner
  • 3. BC COMFORT DESIGN BUILD MECHANICAL CONTRACTORS Service HVAC Plumbing Engineering Controls
  • 4. AGENDA 1. 2. 3. 4. 5. ASHRAE 90.1 Overview Compliance Paths Implementation Cost Envelope HVAC
  • 5. 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
  • 6. National Energy Code for Canada i.e. Canadian ASHRAE 90.1
  • 7. SECTION 4 EXCEPTIONS FOR ALTERATIONS Buildings that are specifically designated as historic  by the adopting authority or  on the National Register of Historic Places or  eligible for listing by the U.S. Secretary of Interior If the building’s annual energy consumption is the same as a building that meets the requirements of Sections 5-10  verified by a design professional using methods acceptable to the authority having jurisdiction
  • 8. 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
  • 9. LEED • LEED Canada CI-V1.0 - Valid until at least 2015 1. ASHRAE 90.1-2004 2. MNECB 1997 • LEED v4 – No more Canadian LEED, now ACP 1. ASHRAE 90.1-2010 2. maybe NECB 2011
  • 10. COST
  • 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  Fenestration replacement less than 25% of total
  • 12. ENVELOPE
  • 13. ENVELOPE
  • 14. SECTION 6 – 6.1.1.3 HVAC ALTERATIONS SCOPE  Equipment – New equipment shall meet the minimum efficiency requirements  Cooling systems – New cooling systems installed to serve previously uncooled spaces shall comply with this section – Alterations to existing cooling systems shall not decrease economizer capacity (unless economizer tradeoff is used)  Ductwork – New and replacement ductwork shall comply with applicable requirements  Piping – New and replacement piping shall comply with applicable requirements
  • 15. SECTION 6 – 6.1.1.3 HVAC ALTERATIONS Alterations to the building HVAC system shall comply with the requirements of Section 6  Exceptions that are allowed: – Equipment being modified or repaired (not replaced) • provided such modifications will not result in an increase in the annual energy consumption – Equipment being replaced or altered which requires extensive revisions to other systems and such replaced or altered equipment is a like-for-like replacement – Refrigerant change of existing equipment – Relocation of existing equipment – Ducts and pipes where there is insufficient space or access to meet these requirements
  • 16. SECTION 7 – 7.1.1.3 SWH ALTERATIONS SWH equipment installed as a direct replacement shall meet these requirements EXCEPTION:  Not sufficient space or access to meet requirements
  • 17. HVAC COMPLIANCE Building System Compliance Options Prescriptive Option Envelope HVAC SWH Power Mandatory Provisions (required for most compliance options) Trade Off Option Energy Cost Budget Lighting Simplified Other Energy Code Compliance
  • 18. SECTION 6 – 6.2 HVAC COMPLIANCE PATHS  You have to follow Sections – 6.1 General, – 6.7 Submittals, and – 6.8 Minimum Equipment Efficiency  And then you can follow either – Section 6.3 Simplified Approach OR – Sections 6.4 Mandatory Provisions and 6.5 Prescriptive Path  Alternatively, you can follow Section 11 (ECB), in which case Section 6.4 is mandatory
  • 19. HVAC 1. Economizers required for > 4 ton RTU 2. Energy Recovery > 5000 CFM units
  • 20. 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
  • 21. 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.
  • 22. THANK YOU Henry Leung, P.Eng., MBA, LEED AP hleung@bccomfort.com 604-412-0206