Instructions Specific to This Exam

1. This examination contains one question worth a total of 100 marks.

2. You will be assessed primarily on your knowledge of the Ontario Rules of Civil Procedure, applicable statutes, assigned cases and other materials identified in the Civil Procedure syllabus, together with your ability to recognize the procedural issues raised by the facts and analyze the competing arguments available to the parties.

3. No marks are awarded for merely reproducing or summarizing the facts. Your answer should identify the relevant procedural issues, state the governing rules and principles, and apply them closely to the facts.

4. Do not provide a general essay on civil procedure or work mechanically through every procedural device in the Rules. Address the issues reasonably raised by the facts and the relief realistically available to the parties.

5. Full case citations are not required for authorities contained in the assigned materials. However, where relevant, identify the applicable Rule, statute or case with sufficient precision to demonstrate knowledge of the governing law.

6. You are asked to prepare a memorandum of law. You do not need to spend examination time constructing formal memorandum headings such as “To,” “From,” “Date” or “Re.” Marks are awarded for substantive analysis.

7. Unless otherwise indicated, apply the Ontario Rules of Civil Procedure, the Limitations Act, 2002, and the Class Proceedings Act, 1992.

8. In addressing jurisdiction, distinguish carefully between:

   • whether the Ontario court has jurisdiction simpliciter over a defendant;

   • service outside Ontario;

   • the relevance of a real and substantial connection; and

   • the separate question whether Ontario should decline jurisdiction on forum non conveniens grounds.

9. In addressing the proposed class proceeding, analyze the statutory certification requirements separately. Do not assume that the existence of numerous similar claims automatically justifies certification, or that individual issues automatically defeat it.

10. In addressing limitation periods, distinguish between the occurrence of the underlying loss and the statutory discovery of a claim. Do not assume that a claimant must possess complete evidence or certainty before a limitation period begins to run.

11. Where interlocutory relief is sought, consider the nature of the relief actually required and whether a narrower procedural order could adequately protect the interests at stake.

12. For purposes of this examination, assume that the pleaded negligence and failure-to-warn claims are recognized causes of action in Canadian law. Do not address the substantive law of product liability except where necessary to analyze a procedural issue.

13. Do not address bankruptcy, insolvency, criminal liability, regulatory offences or insurance coverage.

14. Write a clear and organized answer in complete sentences.

QUESTION

FACTS

Aquila Climate Systems Inc. (“Aquila”) designs and markets residential heat-pump systems throughout Canada.

Aquila is incorporated in British Columbia and maintains its head office, engineering department and principal records in Vancouver.

It has no corporate office in Ontario.

However, approximately 42% of Aquila’s Canadian sales are made to Ontario customers through a network of independent heating contractors and building-supply retailers.

Aquila maintains a Canadian website through which consumers can locate authorized dealers by postal code. It also purchases online advertising targeted specifically at Ontario consumers and sends Aquila technicians from British Columbia to Ontario several times each year to provide dealer training and investigate product failures.

The product at the centre of the present dispute is the Horizon H8 heat pump.

Between January 2021 and June 2024, approximately 18,400 Horizon H8 units were sold in Canada. Approximately 7,600 were installed in Ontario.

Every Horizon H8 contains an electronic controller known as the NX-47 board.

The NX-47 was manufactured by Rosenfeld Elektronik AG (“Rosenfeld”), a corporation headquartered in Germany.

Rosenfeld manufactured the boards in Germany and sold them to Aquila pursuant to a supply agreement negotiated and performed primarily in Germany and British Columbia.

Rosenfeld has no office, employees, bank accounts or property in Canada.

Its boards were shipped directly from Germany to Aquila’s assembly facility in British Columbia.

The supply agreement stated that Aquila intended to sell Horizon H8 systems throughout Canada.

Rosenfeld modified the NX-47 to satisfy Canadian electrical specifications and placed both Aquila’s part number and a bilingual English/French safety label on each unit.

Rosenfeld’s engineers also exchanged technical emails with several Aquila dealers in Ontario when dealers reported controller failures.

No Ontario dealer purchased an NX-47 directly from Rosenfeld.

One Ontario purchaser is Marielle Desrosiers.

Marielle purchased a Horizon H8 from an authorized Aquila dealer in Ottawa in February 2022.

The dealer selected and installed the unit.

Marielle had no direct negotiations with Aquila or Rosenfeld before purchase.

On September 14, 2023, a fire occurred in Marielle’s basement utility room.

The fire damaged the Horizon H8 and part of the surrounding structure.

Marielle’s home insurer paid most of the reconstruction costs, but Marielle personally incurred approximately $47,000 in uninsured property damage, temporary housing expenses and other losses.

The Ottawa fire investigator issued a preliminary report approximately three weeks after the fire.

The report stated:

“The fire originated in the immediate vicinity of the heat-pump electrical assembly. The available evidence does not permit a definitive determination whether the initiating event was a defective component, improper installation, electrical supply irregularity or some combination of those causes.”

Marielle immediately contacted the installing dealer.

The dealer inspected the remains and told her:

“The wiring into the house looks questionable. I would not assume the unit itself was defective.”

Aquila also sent a field technician to inspect the damaged heat pump.

In an email dated October 20, 2023, Aquila told Marielle:

“We have identified no evidence demonstrating a manufacturing defect in the Horizon H8. Installation conditions external to the unit remain a possible explanation.”

Marielle asked her insurer whether she should retain a lawyer.

An insurance adjuster responded:

“There is no clear target yet. We are still trying to determine what actually caused the fire.”

In January 2024, Aquila sent Horizon H8 owners a notice asking them to install a software update.

The notice described the update as:

“a performance enhancement that improves temperature calibration and reduces unnecessary controller cycling.”

It did not refer to any fire risk.

Marielle’s replacement heat pump was a different brand, so she did not install the update.

In March 2024, an independent electrician retained by Marielle’s insurer completed a further examination of the damaged equipment.

He reported:

“There is significant thermal damage in and around the NX-47 controller. I cannot determine from the remaining material whether the controller initiated the overheating or was damaged by heat originating elsewhere. A controller-origin event is a realistic possibility.”

No action was commenced at that time.

In October 2025, a national newspaper published an investigative report concerning Aquila.

The article reproduced excerpts from internal Aquila documents supplied by a former employee.

One internal engineering memorandum from May 2022 recorded overheating during laboratory testing of the NX-47 under conditions of high humidity and repeated compressor cycling.

The memorandum estimated that approximately 1.8% to 2.4% of boards exposed to those combined conditions could exceed the design temperature.

A second internal email stated:

“A hardware recall would be extremely expensive. Software limiting maximum cycling frequency should materially reduce field exposure while engineering works with Rosenfeld on the next controller generation.”

Aquila never publicly disclosed those documents.

Following publication of the article, additional owners reported fires and heat damage associated with Horizon H8 units.

As of November 2025, Aquila’s internal incident records identify:

• 71 reports of abnormal controller overheating;

• 14 fires causing property damage;

• one incident causing serious burns;

• approximately 320 controllers replaced after visible heat damage; and

• several thousand units that have operated without any reported problem.

The affected systems were not installed identically.

Some were installed by Aquila-authorized dealers.

Others were installed by independent contractors.

Some homes had older electrical systems.

Two slightly different versions of the NX-47 were used during the relevant period, although Aquila’s internal documents indicate that both versions shared the same temperature-sensing architecture alleged to be defective.

Marielle first consulted class counsel on October 28, 2025.

On November 17, 2025, she commenced a proposed class proceeding in the Ontario Superior Court of Justice against Aquila and Rosenfeld.

The claim alleges that the defendants negligently designed, tested and distributed the NX-47 system and failed to provide adequate warnings after becoming aware of the overheating risk.

For purposes of this examination, assume those allegations disclose recognized causes of action if the pleaded facts are proven.

Marielle proposes the following class:

“All persons in Canada who purchased, leased or owned a Horizon H8 heat-pump system containing an NX-47 controller manufactured between January 1, 2021 and June 30, 2024.”

The proposed class contains approximately 18,400 people.

Class counsel proposes two subclasses:

1. owners who experienced a fire, overheating event or physical property damage; and

2. owners who did not experience physical damage but incurred costs replacing, inspecting or repairing an NX-47 controller after learning of the alleged defect.

Marielle is proposed as the representative plaintiff for the first subclass.

A second proposed representative, Rémi Lauzon, is an Ontario homeowner whose Horizon H8 never caught fire but who paid approximately $1,450 to replace his NX-47 controller after reading the October 2025 newspaper article.

Rémi is proposed as representative of the second subclass.

The statement of claim proposes the following common issues, among others:

• whether the NX-47 architecture contained a common design defect;

• whether Aquila and Rosenfeld knew or ought to have known of a material overheating risk;

• whether the defendants failed to take reasonable steps after learning of that risk;

• whether Aquila’s January 2024 notice adequately disclosed the alleged safety concern; and

• whether the defendants’ conduct warrants an aggregate or class-wide assessment of any available relief.

The plaintiffs acknowledge that individual class members may still have to prove matters including:

• the cause of a particular fire;

• the condition of a home’s electrical system;

• the conduct of individual installers;

• whether a particular controller actually overheated;

• the nature and amount of individual loss; and

• individual limitation defences.

Aquila opposes certification.

It argues that the action is really thousands of different product-failure cases.

It emphasizes that:

• most Horizon H8 units never failed;

• installations varied materially;

• two controller versions were used;

• there are multiple potential causes of heat damage;

• many purchasers suffered no physical damage;

• individual losses range from several hundred dollars to several hundred thousand dollars; and

• the claims arose at different times.

Aquila also argues that a class proceeding is unnecessary because it has established a voluntary Horizon Resolution Program.

Under the program, owners may receive:

• a free inspection;

• reimbursement of up to $900 for controller replacement; and

• a three-year extended warranty.

The program does not compensate for property damage, personal injury, temporary housing costs or other consequential losses.

Claims are determined by Aquila employees.

There is no independent appeal process.

To receive payment, an owner must sign a release of all claims relating to the NX-47.

The program is scheduled to expire in six months.

Approximately 1,100 owners have already accepted compensation through it.

Aquila argues that the program, individual actions for serious losses and ordinary consumer complaint processes together provide a superior means of resolving the claims.

Class counsel responds that the replacement-cost claims are too small to litigate individually, the serious-loss claims share important liability questions, and Aquila should not be permitted to rely on a compensation program that requires class members to release claims in exchange for limited relief.

Marielle’s own position also creates a dispute.

Aquila pleads that her claim is statute-barred.

It argues that Marielle suffered the fire on September 14, 2023 and knew almost immediately that the Horizon H8 was a possible cause.

It relies particularly on:

• the fire investigator’s report locating the origin near the unit;

• Marielle’s immediate complaint to the installer and Aquila;

• her question to the insurer about retaining a lawyer; and

• the March 2024 electrician’s statement that a controller-origin fire was a realistic possibility.

Aquila argues that Marielle did not need to know of the internal engineering documents, the precise defect or the strength of the evidence before commencing a proceeding.

Marielle responds that several knowledgeable parties specifically told her that installation or outside electrical conditions could have caused the fire.

She says she did not know, and could not reasonably have known, that Aquila’s conduct was a likely cause of her loss until the internal records became public in October 2025.

She also argues that litigation was not an appropriate means of seeking redress while the cause remained genuinely indeterminate.

Aquila says those arguments confuse certainty with discoverability.

Rosenfeld has not filed a defence on the merits.

Instead, it brings a motion challenging the jurisdiction of the Ontario court and seeks to have the claim against it stayed or dismissed.

Rosenfeld argues that:

• it manufactured the boards entirely in Germany;

• its contract was with Aquila in British Columbia;

• it has never sold directly to an Ontario consumer;

• it owns no property in Ontario;

• its witnesses and engineering records are in Germany; and

• German courts would be a more appropriate forum for any claim concerning the design and manufacture of its product.

The plaintiffs respond that thousands of Rosenfeld boards were deliberately manufactured for the Canadian market, thousands entered Ontario, the alleged damage occurred in Ontario, and Rosenfeld communicated directly with Ontario dealers concerning failures.

They also argue that requiring separate litigation against Rosenfeld in Germany would fragment the proceeding and significantly increase the cost of determining common liability issues.

Rosenfeld accepts that it knew Aquila sold the Horizon H8 throughout Canada but says that knowledge that a product may ultimately reach Ontario is not the same thing as carrying on business in Ontario.

It further argues that the existence of a national proposed class should not permit an Ontario court to assume jurisdiction it would not otherwise possess.

The plaintiffs served Rosenfeld outside Ontario in accordance with the procedure they say is authorized by the Rules.

Rosenfeld does not argue that it lacked actual notice of the proceeding.

Its objection is that the factual connection with Ontario is insufficient to permit the Ontario court to exercise jurisdiction over it.

Aquila does not challenge Ontario jurisdiction over itself, although it submits that the national class creates substantial management difficulties because many members, witnesses and installations are outside Ontario.

While the certification and jurisdiction motions are being prepared, a further dispute arises.

Aquila announces that it will deploy a mandatory remote firmware update to all internet-connected Horizon H8 units within 30 days.

Aquila says the update will reduce maximum cycling frequency and therefore further reduce any possible overheating risk.

The update will also automatically reset certain diagnostic logs stored on the controller.

Those logs contain, among other things, historical temperature readings, fault codes and cycling data.

Aquila’s current server configuration retains a separate cloud copy of approximately 60 days of controller data but automatically deletes older data.

Aquila explains that the retention system was created years before this litigation for storage-cost and privacy reasons.

Class counsel’s engineering expert states that historical controller data could be highly important in determining whether common overheating patterns existed across the proposed class.

The expert says that once overwritten or automatically deleted, much of the historical information cannot be reconstructed.

Aquila responds that suspending the update could expose consumers to the very risk the plaintiffs say exists.

It offers instead to preserve the existing server data of the 71 units already associated with reported overheating events.

The plaintiffs say this is inadequate because the common-issues theory depends partly on comparing failed and apparently non-failed units.

At approximately the same time, Rosenfeld advises Aquila that it intends to dispose of several hundred retained NX-47 engineering samples in accordance with a routine five-year document and prototype retention policy.

Some samples are from production batches shipped to Canada.

Rosenfeld says storage is expensive and that no court has ordered preservation.

After receiving a preservation demand from class counsel, Rosenfeld agrees to retain 20 randomly selected samples but refuses to preserve the remainder.

The plaintiffs bring an urgent motion seeking orders that would:

1. require Aquila to preserve relevant diagnostic and server data before implementing any firmware update;

2. prohibit deletion of potentially relevant historical data pending further order;

3. require Rosenfeld to preserve the Canadian-production engineering samples pending the certification motion; and

4. permit the defendants to implement safety measures that do not destroy relevant evidence.

Aquila argues that the requested order is technically burdensome and potentially dangerous if it delays a safety update.

Rosenfeld argues that preserving hundreds of old prototypes before the Ontario court has even determined jurisdiction is disproportionate.

The plaintiffs respond that the requested relief is temporary, preservation costs are modest compared with the size of the litigation, and destruction of the evidence would be irreversible.

The certification motion is scheduled to be heard in four months.

Rosenfeld’s jurisdiction motion is scheduled two weeks earlier.

The defendants disagree with the plaintiffs about the proper procedural sequence.

Rosenfeld says its jurisdiction challenge must be decided before it is required to participate in any aspect of certification.

The plaintiffs argue that the court can coordinate the motions and make temporary preservation orders without prejudging Rosenfeld’s jurisdiction objection.

Marielle and Rémi now seek advice on how the proceeding should move forward.

QUESTION

The senior partner at your firm asks you to prepare a brief but comprehensive memorandum advising Marielle and Rémi on the significant Ontario civil-procedure issues arising from the full sequence of events.

Your memorandum should address the limitation issue affecting Marielle, Ontario’s jurisdiction over Rosenfeld and Rosenfeld’s forum arguments, the proposed certification of the class proceeding, the urgent request for preservation and interlocutory relief, and the appropriate procedural management of the competing motions.

Your analysis should identify the governing Rules, statutory principles and assigned authorities, assess the strongest arguments on both sides, and explain the likely practical consequences of the available procedural choices.

Do not address the ultimate merits of the product-liability claims except where necessary to analyze the procedural issues.

100 MARKS