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

1. What is ASHRAE 90.1?

2. Cannon Design is a Registered Provider with The American Institute of
g g
Architects Continuing Education Systems. Credit earned on completion of this
program will be reported to CES Records for AIA members. Certificates of
Completion for non-AIA members are available on request.
This program is registered with the AIA/CES for continuing professional
education. As such, it does not include content that may be deemed or
construed to be an approval or endorsement by the AIA of any material of
construction or any method or manner of handling, using, distributing, or
dealing in any material or product. Questions related to specific materials,
methods, and services will be addressed at the conclusion of this
presentation.
AIA HSW/SD LU = 1
PIE PDH = 1

3. Cannon Design
What is ASHRAE 90.1-2010?
1

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. 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. History of ASHRAE 90.1

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. Regionalization by Climate Zone
MARINE (C) DRY (B) MOIST (A)
Warm-Humid
below White Line

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 calls
Sub-Committees:
- Building Envelope
- Mechanical
- Electrical
- Energy Cost Budget
- Format and Compliance
F t dC li

10. Compliance with Standard 90.1

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 criteria
Appendix 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. ASHRAE 90.1-2010

14. Why?

15. Why?

16. Measuring Our Progress - PNNL Progress Indicator

21. 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

22. Energy Performance Results by Prototype

23. Did we reach our goal?

24. QUESTIONS?

25. How did we get there?

26. New Addenda

27. Addenda Goals
Technically justified
Simplicity
Flexibility
Enforceable

28. 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

29. Title Purpose and Scope
2.
2 SCOPE
2.1 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

30. 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

31. Addenda Finished but not Approved
Addendum bb - Increased Wall Insulation
Example –Zone 5 Steel Framed•
2.67”

32. What’s New in 90.1-2010 – Building Envelope
Building 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.

33. What’s New in 90.1-2010 – Building Envelope
More 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

34. What’s New in 90.1-2010 – Building Envelope
Additional R
Addi i l Requirements:
i
Cool roofs required in Zones 1-3
q
Minimum 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

35. 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

36. What’s New in 90.1-2010 – HVAC
Scope
- Equipment efficiency ratings
- Energy recovery
- Economizers
- Duct sealing and leakage
- Fan Power
- Reheat limitations

37. What’s New in 90.1-2010 – HVAC
Equipment Effi i
E 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

38. What’s New in 90.1-2010 – HVAC
Waterside 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

39. What’s New in 90.1-2010 – HVAC
Maximum fl
M i flows i nominal pipe sizes.
in i l i i

40. What’s New in 90.1-2010 – HVAC
Outdoor 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

41. What’s New in 90.1-2010 – HVAC
Air-side Economizers
Ai id E i
-

42. What’s New in 90.1-2010 – HVAC
Economizer Exceptions
-

43. 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

44. What’s New in 90.1-2010 – HVAC
Dual
D l maximum control on VAV b
i l boxes.

45. What’s New in 90.1-2010 – HVAC
Energy Recovery R
E R Requirements
i

46. What’s New in 90.1-2010 – Lighting
Covers
- 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

47. What’s New in 90.1-2010 – Lighting
Lighting Power Density changes
The LPD for most building areas and space
types were reduced but in some
instances the LPD was increased.

48. What’s New in 90.1-2010 – Lighting
Lighting Changes
Li 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

49. What’s New in 90.1-2010 – Lighting
Automatic D li hti C t l f Primary
A t ti Daylighting Controls for P i
Sidelighted Areas > 1,000 sq.ft..

50. Suggestions for compliance – Lighting
Suggestions for compliance
S 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

51. What’s Next: 90.1-2013

52. 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

53. 90.1-2013 Looking Forward
1. Whole B ildi Design Linked Criteria
1 Wh l Building D i – Li k d C i i
2. Pilot a performance based compliance path

54. 90.1-2013 Looking Forward
Changes 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

55. 90.1-2013 – Looking Forward
Ideas are welcome

56. Questions?
For more information please contact:
Mike Tillou
Cannon Design
716.774.3550
MTillou@cannondesign.com
MTillou@cannondesign com
This concludes The American Institute of Architects Continuing Education Systems Program