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
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
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
15.
16.
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
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
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
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.
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.
