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

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

8. National Energy Code for
Canada
i.e. Canadian
ASHRAE 90.1

13. 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

14. 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

17. 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

18. COST

19. 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

20. ENVELOPE

21. ENVELOPE

22. 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

23. 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

24. 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

25. 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

26. 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

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

28. 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

29. 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.

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