You are designing or reviewing an HVAC system for a building in Canada. You know you need to be code compliant. But which codes apply? Which standards are mandatory versus recommended? And what exactly do they require you to do?
This is one of the most common gaps in applied engineering practice. Engineers know ASHRAE standards exist. What many do not know is that in Canada, these standards are directly cited in provincial and federal building codes — which makes compliance with them legally mandatory, not optional.
Why Codes and Standards Matter More Than Most Engineers Realize
ASHRAE standards are voluntary technical references — until a building code cites them. When the National Building Code or a provincial building code references an ASHRAE standard, that standard becomes law. Non-compliance is not a technical shortcoming. It is a code violation.
In Canada, the National Building Code and provincial building codes — including the Ontario Building Code — explicitly cite ASHRAE standards 55, 62.1, and 90.1. Any engineer designing, specifying, or commissioning an HVAC system for a regulated building in Canada is legally required to meet the requirements in these standards.
This is the knowledge gap that matters most: treating these standards as guidelines when they are in fact obligations.
The Three ASHRAE Standards Every Canadian HVAC Engineer Must Know
Thermal Environmental Conditions for Human Occupancy
ASHRAE 55 defines the combinations of indoor thermal conditions and personal factors that produce thermal comfort for the majority of occupants in a space.
- Acceptable ranges of temperature, humidity, air speed, and radiant temperature
- Seasonal and clothing adjustments
- Local discomfort criteria: drafts, radiant asymmetry, floor temperature
- Methods for evaluating comfort compliance
Ventilation and Acceptable Indoor Air Quality
ASHRAE 62.1 sets the minimum ventilation rates and other measures required to maintain acceptable indoor air quality in commercial, institutional, and industrial buildings.
- Minimum outdoor air ventilation rates by occupancy type and space type
- Ventilation system procedures: Ventilation Rate Procedure and Indoor Air Quality Procedure
- System design and operation requirements
- Filtration, exhaust, and recirculation requirements
- Demand-controlled ventilation
Energy Standard for Buildings Except Low-Rise Residential Buildings
ASHRAE 90.1 sets minimum energy efficiency requirements for building envelope, HVAC systems, service water heating, power, lighting, and other systems.
- Minimum equipment efficiency requirements: SEER, EER, COP, IPLV ratings
- HVAC system selection criteria and limitations
- Controls requirements: economizers, setback, optimum start
- Commissioning requirements
- Two compliance paths: Prescriptive and Performance (energy modeling)
ASHRAE 90.1 is the Energy Baseline for LEED
ASHRAE 90.1 also forms the mandatory energy baseline for LEED (Leadership in Energy and Environmental Design) certification, widely pursued for commercial and institutional buildings in Canada.
To achieve any level of LEED certification, a building must meet ASHRAE 90.1 as a minimum. Meeting 90.1 exactly earns zero energy credits — it only satisfies the prerequisite. Credits toward Silver, Gold, or Platinum are earned by demonstrating energy performance that exceeds 90.1 by increasing percentages, typically through energy modeling.
For engineers working on projects with LEED targets, understanding ASHRAE 90.1 in detail is not optional — it defines both the floor you must clear and the benchmark against which your design is scored.
The Compliance Framework: How the Standards Connect
- A building must be designed to maintain comfort conditions within ASHRAE 55 limits
- It must provide minimum ventilation per ASHRAE 62.1 to achieve acceptable air quality
- It must do this with equipment and systems that meet ASHRAE 90.1 efficiency requirements
Who Faces This Challenge
Code compliance knowledge gaps affect engineers across disciplines and career stages:
- Mechanical engineers designing HVAC systems for new buildings or major renovations who need to demonstrate compliance before permits are issued
- Engineers from other disciplines assigned HVAC oversight responsibility who are unfamiliar with the applicable standards
- Facility managers and building operators whose systems are flagged in inspections, energy audits, or tenant complaints
- Commissioning engineers verifying that installed systems meet code before handover
- Consultants and contractors who need to specify code-compliant equipment and defend their designs to authorities having jurisdiction
- Foreign-trained engineers entering the Canadian or North American HVAC workforce - engineers trained in other countries often have strong fundamentals but no exposure to Canadian building codes, the ASHRAE standards incorporated into them, the software tools used in Canadian practice, or the regulatory framework required for P.Eng licensure in Ontario. For these engineers, this course establishes the legal and professional foundation that everything else in Canadian HVAC practice is built on.
What the Course Covers
The Codes and Standards of HVAC Systems course provides comprehensive coverage of the provincial building codes and the ASHRAE standards they cite, through case studies and practical workshops.
- Psychrometric representation and HVAC cycles — the technical foundation
- Overview of HVAC system types and their code-relevant characteristics
- Building code sections governing HVAC systems
- Applicable codes and standards for design and operation
- ASHRAE Standard 55: thermal comfort conditions in full detail
- ASHRAE Standard 62.1: ventilation for acceptable indoor air quality
- ASHRAE Standard 90.1: energy efficiency requirements
- Prescriptive and performance compliance approaches
- Case studies and workshops applying the standards to real design problems
- Recent code updates affecting HVAC design and operation
Attendees leave able to identify which standards apply to their project, interpret the requirements correctly, and demonstrate compliance in their designs.
"Excellent. Very knowledgeable. Did a great job. Best instructor I have seen."
"Fantastic instructor! Mastery of experience."
"The quality of the course was knowledgeable with intellectual approaches."
Frequently Asked Questions
On their own, ASHRAE standards are voluntary technical documents. However, the National Building Code of Canada and provincial building codes directly cite ASHRAE 55, 62.1, and 90.1, making compliance with these standards legally mandatory for any HVAC system in a regulated building. The standards become law through their incorporation into the building code.
Most Canadian provinces adopt or adapt the National Building Code, which cites these ASHRAE standards. Ontario, British Columbia, Alberta, and other provinces all have building codes that reference ASHRAE 55, 62.1, and 90.1 for HVAC system requirements. The specific edition referenced may vary by province and update cycle.
ASHRAE 62.1 governs ventilation for commercial, institutional, and industrial buildings. ASHRAE 62.2 governs ventilation in low-rise residential buildings. The Codes and Standards course covers 62.1, which applies to the commercial and institutional building types most engineers work on.
The Prescriptive path requires meeting specific minimum efficiency ratings and equipment requirements defined in the standard. The Performance path (energy modeling) allows flexibility in how you meet the overall energy budget, provided an energy model demonstrates the building performs at least as well as a code-compliant reference building. The course covers both approaches.
Yes. ASHRAE 90.1 is the mandatory energy baseline for any level of LEED certification. A building that fails to meet 90.1 cannot be LEED certified at any level. Credits toward Silver, Gold, or Platinum are earned by the percentage by which the building's energy consumption improves beyond the 90.1 baseline.
ASHRAE typically publishes new editions of these standards on a 3-year cycle. Canadian building codes reference specific editions, so the applicable version depends on which edition your provincial code has adopted. The course covers the current requirements and flags where recent updates have changed the obligations.
Yes. The Codes and Standards of HVAC Systems course provides 28 formal CPD hours, all qualifying as core engineering learning toward PEO PEAK requirements. It is PEO PEAK compliant.
Codes and Standards of HVAC Systems
5 days · 28 CPD Hours · PEO PEAK compliant · $2,495 per attendee
Group discount: 10% off per attendee for three or more participants from the same organization.
