Many HVAC designs focus primarily on code compliance and peak-load performance, often overlooking how buildings actually operate throughout the year. This presentation challenges that conventional approach and introduces a structured design methodology that prioritizes performance, resilience, indoor environmental quality, and user experience from project inception through commissioning.

Using a detailed off-grid residential case study in Mont-Tremblant, Quebec, the session walks attendees through a six-step design framework:

1. Start with the Owner’s Project Requirements (OPR) — Clearly define performance goals, comfort expectations, cost priorities, and system features before technical design begins.
2. Use Design Charrettes to Align the Team — Engage stakeholders early to uncover constraints, resolve conflicts, and build consensus around measurable outcomes.
3. Quantify the Unknowns — Apply standards such as CSA F280 (Heating and Cooling Loads), CSA F326 (Ventilation), and building science tools including CBE comfort modeling resources to assess thermal loads, ventilation needs, depressurization risks, and occupant comfort.
4. Evaluate Systems Beyond Code Compliance — Analyze partial-load performance, modulation ranges, balance points, and real-world operating conditions rather than focusing solely on design-day extremes.
5. Select Equipment that Matches Reality — Compare system turndown ratios, cold-climate limitations, and energy source integration to prevent short cycling and optimize seasonal efficiency.
6. Document with a Clear Sequence of Operations — Define control logic and system coordination to ensure energy efficiency, comfort, commissioning success, and long-term reliability.

Through seasonal load modeling and performance mapping, the presentation demonstrates how conventional modulating furnaces, air-source heat pumps, and condensing boilers may underperform when minimum capacity exceeds actual building loads. Attendees will see how partial-load mismatch leads to short cycling, reduced efficiency, and compromised comfort—particularly in high-performance or intermittently occupied buildings.

The case study culminates in a hybrid system design integrating propane condensing boilers with an air-to-water heat pump, optimized for off-grid operation using photovoltaic generation and propane backup. The solution illustrates how energy-source flexibility, zoning, and advanced control strategies can align system performance with real-world load profiles and owner priorities.

The session also emphasizes the importance of indoor air quality management beyond prescriptive ventilation rates, highlighting contaminant-driven ventilation strategies, filtration approaches, depressurization control, and the role of mean radiant temperature in achieving ASHRAE 55 thermal comfort compliance.

Buildings designed for northern, remote, and Arctic communities face challenges that are fundamentally different from those encountered in southern urban environments. Extreme cold, prolonged darkness, thaw-sensitive permafrost, limited transportation access, diesel-generated electricity, and unique water and wastewater infrastructure systems significantly influence mechanical and building design decisions.

This presentation introduces the climatic, geographic, and infrastructural realities that shape building systems in Canada’s North. Using ASHRAE climate data and real project examples, attendees will examine how extreme temperature differentials, limited fuel supply chains, and high electricity costs affect heating, ventilation, and energy strategy. Topics include ventilation preheat requirements, combustion air implications, frozen flue-gas risk, tank-based potable water systems, tank-based sewage holding and disposal, utilidor infrastructure, and the thermal protection of permafrost through raised foundations and thermosyphon systems.

Beyond technical considerations, the lecture explores the logistical and economic constraints of remote construction, including sealift supply chains, ice roads, long procurement timelines, and infrastructure replacement challenges. Attendees will gain insight into how limited access and high material costs demand long-term forecasting, resilience, and simplified system strategies.

Importantly, the presentation also addresses the cultural and governance context in which engineering work occurs. Northern communities are home to diverse Indigenous Nations with treaty and land claim agreements that directly affect project approval and execution. The lecture highlights the importance of cultural awareness, engagement with regional governing bodies operating under land claim agreements, and sensitivity to sustenance lifestyles and local priorities. Historical examples—including the legacy of resource extraction and large-scale environmental remediation efforts—illustrate why trust, transparency, and environmental stewardship are central to engineering practice in these regions.

Attendees will leave with:

• A practical understanding of how Arctic climate conditions impact HVAC and plumbing system design
• Insight into off-grid energy realities and diesel-dependent electrical systems
• Strategies for protecting permafrost and maintaining infrastructure in extreme cold
• Awareness of logistical planning requirements unique to remote regions
• A framework for culturally informed engineering engagement in northern communities

This session challenges conventional southern-based design assumptions and equips engineers, architects, contractors, and policy makers with the contextual understanding necessary to design systems that are resilient, respectful, and sustainable in some of the most demanding environments in North America.

HVAC design offers countless ways to heat, cool, and ventilate a building. The challenge is not sizing equipment—it is choosing the right system for a specific project. The Art of System Selection presents a disciplined framework for making defensible, performance-driven system decisions rather than defaulting to familiar or lowest-cost solutions.

Built around the principle that “we are in the solutions industry,” this session introduces a four-step methodology:

1. Define the Problem – Clearly establish project constraints, including occupancy requirements, codes and standards, architectural limitations, energy sources, and budget.
2. Quantify the Unknowns – Perform load calculations, ventilation analysis, service reviews, and coordination to identify objective design variables.
3. Compile Possible Solutions – Generate viable system concepts (forced air, hydronic, VRF, zoning strategies, energy recovery, etc.) without prematurely favoring one.
4. Ask “What Sucks About It?” – Critically evaluate each option by identifying weaknesses, risks, and limitations. Rather than reinforcing benefits, this stage disqualifies the least-fit solution through objective scrutiny.
   
   

This structured approach prevents designers from forcing preconceived answers onto projects and instead allows constraints and quantified variables to guide the outcome. Emphasis is placed on professional, dispassionate critique and avoiding ego-driven decisions.

A case study of a church renovation in the Greater Toronto Area illustrates the method in practice. The project required conversion from electric heating to natural gas, full-building cooling, daycare occupancy compliance, structural constraints due to core slab construction, and adherence to a fixed budget. Two primary options—forced air and hydronic—were evaluated.

While the forced air option offered lower initial cost and familiarity, it introduced operating inefficiencies, zoning limitations, and structural impacts. The hydronic solution required greater equipment count and higher upfront cost but provided improved zoning, part-load efficiency, redundancy, and better alignment with the client’s operational realities.

Through systematic evaluation of drawbacks and mitigation strategies, attendees see how rigorous critique, not preference leads to sound system selection.

Attendees will leave with:

• A repeatable framework for system selection
• Tools to prevent bias in early design
• Strategies for balancing capital cost and operational performance
• Greater confidence in defending system choices

This presentation reframes system selection as both analytical and philosophical: the goal is not the most conventional system, but the fittest solution for the defined problem.

Conflict between engineers and contractors is one of the most persistent challenges in the construction industry. While disagreements often appear to center on drawings, specifications, costs, or code requirements, the root causes are typically deeper: lack of shared perspective and poor communication.

This presentation explores why conflict arises and offers a practical framework for reducing friction on projects. Drawing from real-world experience on both the contracting and engineering sides, the session focuses on two primary drivers of conflict:

1. Lack of Cognitive Empathy – Failing to recognize and appreciate the other party’s constraints, responsibilities, and professional obligations.
2. Poor Communication – Inability to clearly convey intent through drawings, specifications, and discussions.

Through case studies, attendees examine how unclear drawings and incomplete specifications create financial risk during the tender process. Contractors often assume significant economic liability when pricing ambiguous documents, and breakdowns in communication can damage trust and working relationships.

The session also examines the engineer’s perspective. Professional engineers are bound by licensing requirements, ethical obligations, and legal accountability when sealing documents. They must balance code compliance, life safety, professional standards, client expectations, and risk management—often under significant time pressure. These obligations can require engineers to enforce requirements that may appear unnecessary or costly to others.

A demonstration of “The Curse of Knowledge” highlights how easily communicators assume their intent is obvious. Technical expertise does not guarantee clarity. Designers must account for what contractors do not know, and contractors must recognize the unseen considerations influencing engineering decisions.

The presentation identifies common ground between the professions:

• Both operate under financial pressure and compressed timelines
• Both face demanding clients and incomplete information
• Both assume significant forms of risk—financial on one side, legal and ethical on the other
• Both are typically acting in good faith
  
  

Attendees will leave with:

• Greater insight into the structural differences between engineering and trade pathways
• Practical strategies to improve drawing clarity and communication
• Tools to reduce emotional bias and avoid assumptions of incompetence or malice
• Actionable steps to foster collaboration and mutual respect

This session reframes conflict not as a technical inevitability, but as a human challenge that can be addressed through improved perspective, deliberate communication, and professional empathy.