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.

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

10. National Energy Code
for Canada 2011
i.e. Canadian
ASHRAE 90.1

12. 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

16. 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

17. COST

19. ENVELOPE

20. 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

21. ENVELOPE

22. 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

23. Envelope

24. Envelope

25. 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

26. 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

27. 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

28. HVAC
1. Economizers required for > 4 ton RTU
2. Energy Recovery > 5000 CFM units

29. 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

30. 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.

31. LIGHTING
• Lighting alteration requirements take effect at 10%
replacement
• Include exterior areas
• Include renovations even when it is just
lamp/ballast replacement

33. 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

34. 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

35. 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

36. 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

37. 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

38. THANK YOU
Henry Leung, P.Eng., MBA, LEED AP
hleung@bccomfort.com
604-412-0206