What is ASHRAE 90.1?


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MIke Tillou, PE, LEED AP, delivered this presentation to the Boston ASHRAE chapter.

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What is ASHRAE 90.1?

  1. 1. What is ASHRAE 90.1?
  2. 2. Cannon Design is a Registered Provider with The American Institute of g gArchitects Continuing Education Systems. Credit earned on completion of thisprogram will be reported to CES Records for AIA members. Certificates ofCompletion for non-AIA members are available on request.This program is registered with the AIA/CES for continuing professionaleducation. As such, it does not include content that may be deemed orconstrued to be an approval or endorsement by the AIA of any material ofconstruction or any method or manner of handling, using, distributing, ordealing in any material or product. Questions related to specific materials,methods, and services will be addressed at the conclusion of thispresentation.AIA HSW/SD LU = 1PIE PDH = 1
  3. 3. Cannon DesignWhat is ASHRAE 90.1-2010? 1
  4. 4. Learning Objectives- P id an overview of ASHRAE Standard 90.1, including history, Provide i f St d d 90 1 i l di hi t scope, and process for maintaining the standards- Describe the energy savings comparison of 90.1-2010 to 90.1-2004- Discuss approved changes to 90.1-2010- Describe future improvements for 90.1-2013
  5. 5. What is ASHRAE 90.1?- Mi i Minimum St d d f the energy Standard for th efficiency of buildings and building components.- Covers: - Building Envelope - Heating, Ventilation and Air Conditioning Equipment - Lighting - Service Water Heating - Some building process loads - Electrical motors and transformers
  6. 6. History of ASHRAE 90.1
  7. 7. Consensus Standard: - Stakeholders include: manufacturer’s, designers, code officials, trade organizations and user groups. - All changes must be moved forward and approved by g y a majority of the members on the committee - Follows the requirements established by ANSI.Cost effective: - All items are evaluated for cost effectiveness - Prescribed set of financial criteria updated every 3 years - This is a unique feature of ASHRAE 90.1.
  8. 8. Regionalization by Climate Zone MARINE (C) DRY (B) MOIST (A) Warm-Humid below White Line
  9. 9. Continuous Maintenance: - Began in 2001 - New versions every 3 years y - Addendum published continuously - Full Committee meetings 4 times a year - Monthly Sub-committee callsSub-Committees: - Building Envelope - Mechanical - Electrical - Energy Cost Budget - Format and Compliance F t dC li
  10. 10. Compliance with Standard 90.1
  11. 11. Appendix G Performance Rating Method- M th d l Methodology t calculate th energy performance b to l l t the f beyond d the minimum requirements of the standard.- Requires hourly energy simulation.- Establishes the baseline reference building criteriaAppendix G is referenced by- USGBC for LEED energy performance credits- The Federal Building Energy Tax credit- ASHRAE Standard 189.1 Green Building Standard- Local green building standards
  12. 12. ASHRAE 90.1-2010
  13. 13. Why?
  14. 14. Why?
  15. 15. Measuring Our Progress - PNNL Progress Indicator
  16. 16. Progress Indicator Construction Weighting- B ildi prototypes cover 80% of construction area Building t t f t ti- Assigned by area g y Maximum impact by area: Retail, warehouse, apartment, education, office- Assigned by climate zone Maximum impact by climate o Zones 3-5 have 73% of construction volume o Zones 2-5 have 91% of construction volume 25
  17. 17. Energy Performance Results by Prototype
  18. 18. Did we reach our goal?
  19. 19. QUESTIONS?
  20. 20. How did we get there?
  21. 21. New Addenda
  22. 22. Addenda Goals Technically justified Simplicity Flexibility Enforceable
  23. 23. What’s New in ASHRAE 90.1-2010? Revised Title Purpose and S R i d Titl P d Scope Building Envelope Continuous Ai B i C ti Air Barrier Constrained Glazing Requirements Minimum Skylight Areas HVAC Improvements Equipment Efficiencies g Waterside Design Airside Design Outside Air Lighting Improvements Li hti I t
  24. 24. Title Purpose and Scope2.2 SCOPE2.1 This standard provides: a. minimum energy-efficient requirements for the design, construction, construction and a plan for operation and maintenance of: - new buildings and their systems - new portions of buildings and their systems - new systems and equipment in existing b ildi t d i ti i ti buildings - new equipment or building systems specifically identified in the standard that are part of industrial or manufacturing processes b. criteria for determining compliance with these require-ments.Addition allows previously un-regulated energy uses to be brought into the scope of the standard
  25. 25. Addenda Finished but not Approved• BB – Envelope, opaque and fenestration*• BU – Datacenters* Datacenters• CX – 40% WWR option*• CY – Economizers*• DF – Elevators* - Denotes high profile addenda
  26. 26. Addenda Finished but not ApprovedAddendum bb - Increased Wall Insulation Example –Zone 5 Steel Framed• 2.67”
  27. 27. What’s New in 90.1-2010 – Building EnvelopeBuilding Envelope –Air Barrier (bf) - clearly identify components on construction documents. - Detail all joints, interconnections, and penetrations - Shall extend over all surfaces of the building envelope - Sh ll b d i Shall be designed t resist posi-tive and d to i t i ti d negative pressures from wind, stack effect, and mechanical ventilation.
  28. 28. What’s New in 90.1-2010 – Building EnvelopeMore S th glazing th E t or W t (bn)M South l i than East West (b ) - Building orientation - Land purchases and campus planning - No public review comments Exceptions - Storefront, - Shaded building, Infill with nearby building on south, - Alterations with no increase in glazing g g
  29. 29. What’s New in 90.1-2010 – Building EnvelopeAdditional RAddi i l Requirements: iCool roofs required in Zones 1-3 qMinimum Skylight area - spaces greater than 5,000 sq.ft. with t th 5 000 ft ith ceilings > 15’ - daylight area under skylights = ½ floor area under the skylight
  30. 30. Suggestions for Compliance – Building Envelope 1. Plan building orientation early 2. Shade glass or use low SHGF 3. ‘Super’ glass & ‘Envelope Trade-off Option’ 4. Early integration of architecture and 4 E l i t ti f hit t d MEP engineering• - Envelope design affects HVAC design p g g - Energy modeling for comparing options and balancing efficiency with cost
  31. 31. What’s New in 90.1-2010 – HVACScope- Equipment efficiency ratings- Energy recovery- Economizers- Duct sealing and leakage- Fan Power- Reheat limitations
  32. 32. What’s New in 90.1-2010 – HVACEquipment Effi iE i t Efficiency Changes Ch- Unitary air conditioners and heat pumps- Single-zone VAV- Water-cooled and evap cooled air cond. and heat pumps.- Packaged terminal air conditioners and heat pumps- Water-to-water heat pumps- Computer room air conditioners (CRAC).- Variable-refrigerant-flow (VRF) multi-splits.- Chillers.- Glycol or brine in chillers- Cooling Towers- Liquid-to-liquid heat exchangers.- Heat pump pool heaters- Furnaces & water heating
  33. 33. What’s New in 90.1-2010 – HVACWaterside System Design- Two-position valves in water-cooled unitary products.- Variable-flow and variable-speed p p g p pumping.- Service water booster systems- Pump pressure optimization- Maximum flows in nominal pipe sizes.- Pump head calculations- Pipe insulation. insulation
  34. 34. What’s New in 90.1-2010 – HVACMaximum flM i flows i nominal pipe sizes. in i l i i
  35. 35. What’s New in 90.1-2010 – HVACOutdoor Ai D i Air Design and C d Control l- Economizers.- Heat recovery economizer exception exception.- Data center exceptions for air economizers.- Waterside economizers for data centers.- Dampers.- Exhaust air energy recovery- Z Zone-level d l l demand-controlled ventilation (DCV) d t ll d til ti (DCV).- Ventilation optimization (ventilation reset).- Garage ventilation controls g
  36. 36. What’s New in 90.1-2010 – HVACAir-side EconomizersAi id E i-
  37. 37. What’s New in 90.1-2010 – HVACEconomizer Exceptions-
  38. 38. What’s New in 90.1-2010 – HVAC Airside Design d Control Ai id D i and C t l - Supply air reset controls. - Dual maximum control on VAV boxes. - Overhead heating temperature limit. - VAV control on lab exhaust systems. - VAV requirements for chilled water air-handling units serving a single-zone. - Fan power limitation p - Heat recovery pressure drop adjustments . - Kitchen exhaust hoods - Duct leakage —class A
  39. 39. What’s New in 90.1-2010 – HVACDualD l maximum control on VAV b i l boxes.
  40. 40. What’s New in 90.1-2010 – HVACEnergy Recovery RE R Requirements i
  41. 41. What’s New in 90.1-2010 – LightingCovers- Interior spaces of buildings- Exterior building features- Exterior grounds lighting powered through the building Exceptions E ti - Emergency lighting that is normally off - Lighting required by life safety statute - Lighting in dwelling units
  42. 42. What’s New in 90.1-2010 – LightingLighting Power Density changesThe LPD for most building areas and space types were reduced but in some instances the LPD was increased.
  43. 43. What’s New in 90.1-2010 – LightingLighting ChangesLi hti Ch Exit Signs Limited to 5 Watts Exterior allowance adjustments Extended shutoff requirements to buildings <5,000 SF Requires “manual on” for most lighting controls Modified to only allow 50% on Daylight switching requirements for areas with >1,000 SF of day-lit space Allows a LPD credit if controls are added in addition to mandatory requirements
  44. 44. What’s New in 90.1-2010 – LightingAutomatic D li hti C t l f PrimaryA t ti Daylighting Controls for P i Sidelighted Areas > 1,000 sq.ft..
  45. 45. Suggestions for compliance – LightingSuggestions for complianceS ti f li- Minimize incandescent use- Use efficient sources –e.g. super T-8 e.g. T8- Use efficient fixtures- Vary lighting levels according to need- Incorporate automatic lighting controls- Look for daylighting opportunities
  46. 46. What’s Next: 90.1-2013
  47. 47. ASHRAE Standard 90.1-2013 Expand to new areas Commercial/industrial equipment Where to start Identify & engage stakeholders Workplan Goal – 40% Whole Building energy savings over 90.1-2004
  48. 48. 90.1-2013 Looking Forward1. Whole B ildi Design Linked Criteria1 Wh l Building D i – Li k d C i i2. Pilot a performance based compliance path
  49. 49. 90.1-2013 Looking ForwardChanges Already Approved for Public Review Exterior Wall Insulation improvements(Finally!) Escalator/Moving Sidewalk controls Maximum Glazing percentages by Building type in Appendix G Efficiency Requirements for Commercial Refrigeration Equipment Minimum Efficiencies for Air-to-Water ground source and ground water heat pumps Minimum Transformer Efficiency requirements
  50. 50. 90.1-2013 – Looking Forward Ideas are welcome
  51. 51. Questions?For more information please contact:Mike TillouCannon Design716.774.3550MTillou@cannondesign.comMTillou@cannondesign comThis concludes The American Institute of Architects Continuing Education Systems Program