Respirator Fit Testing Equipment: A Complete Guide for Ontario Employers

When a respirator fails to seal properly, it offers little more protection than wearing no mask at all. For Ontario employers, this is not just a safety concern; it is a legal obligation under the Occupational Health and Safety Act. Selecting and using the right respirator fit testing equipment is the foundation of any compliant respiratory protection program, yet many workplaces still struggle to understand what equipment they need, how it works, and when to use it.

This guide is designed to walk you through everything you need to know about respirator fit testing equipment from a practical, employer-focused perspective. You will learn about the two primary testing methods, quantitative and qualitative, the specific tools and devices used in each, and how to determine which approach suits your workplace. We will also cover Ontario-specific regulatory requirements and best practices for maintaining your equipment over time.

Whether you are building a respiratory protection program from the ground up or refining an existing one, this guide gives you the knowledge to make informed, compliant decisions.

Why Respirator Fit Testing Is a Legal Requirement in Ontario

In Ontario, respirator fit testing is not a best practice recommendation; it is a legal obligation backed by enforceable provincial legislation. Employers who require workers to wear tight-fitting respirators in hazardous environments must ensure those respirators seal correctly before any exposure occurs. This requirement flows directly from Ontario Regulation 833 (Control of Exposure to Biological or Chemical Agents), which establishes written measures and procedures for the selection, use, and care of respiratory protective equipment. A respirator that fails to seal properly provides no meaningful protection, regardless of its filtration rating. Airborne particles, vapors, and biological agents can bypass a poorly fitted facepiece entirely, creating a dangerous illusion of safety.

The technical framework governing how fit testing must be conducted is set out in CAN/CSA Standard Z94.4 (Selection, Use, and Care of Respirators). This standard specifies both the acceptable testing methods, qualitative and quantitative, and the minimum frequency requirements. Fit testing must be completed before a respirator is first used, repeated at least every two years thereafter, and conducted again whenever a worker changes respirator models or experiences significant changes in facial structure. CSA Z94.4 also establishes minimum fit factor thresholds; half-face respirators require a fit factor of at least 100, while full-face respirators require a minimum of 500. Documentation of all testing outcomes must be maintained as part of a written respiratory protection program.

The Ontario Occupational Health and Safety Act places the primary duty of care squarely on employers. A compliant respiratory protection program must address hazard identification, respirator selection, fit testing, maintenance, and recordkeeping as core components. The Ontario Ministry of Labour, Immigration, Training and Skills Development enforces these obligations through workplace inspections, with the authority to issue compliance orders, stop-work directives, and financial penalties for violations.

Since 2020, enforcement intensity has increased measurably across healthcare, pharmaceutical, and industrial workplaces. Inspectors are now treating fit testing records as mandatory audit documentation, and organizations that formalized N95 programs during the pandemic are being held to those standards under OHSA and Regulation 833 going forward.

The Two Categories of Respirator Fit Testing Equipment

Respirator fit testing equipment falls into two distinct categories, and understanding the difference is foundational for any employer navigating compliance obligations under CSA Z94.4. Qualitative Fit Testing (QLFT) relies entirely on the wearer's sensory response to a challenge agent, typically saccharin (detected by taste as sweet), Bitrex/denatonium benzoate (detected as bitter), or isoamyl acetate (detected by smell). No instruments measure actual leakage; the test simply determines whether the wearer can detect the agent penetrating the facepiece seal. Quantitative Fit Testing (QNFT), by contrast, uses precision instrumentation to measure actual particle penetration and generates a numerical fit factor, with minimum thresholds of 100 for half facepieces and 500 for full facepieces.

The regulatory implications of this distinction are significant. CSA Z94.4 prescribes specific conditions under which each method is acceptable, and QNFT is mandatory in situations requiring higher assigned protection factors or when using supplied-air respirators in demand mode. QLFT, while lower in cost and simpler to administer, cannot validate the same range of respirator types that QNFT can. This is precisely why quantitative fit testing is increasingly recognized as the superior approach for regulated industries prioritizing auditability and objectivity.

For employers evaluating whether to procure in-house equipment or engage a fit testing provider, these differences carry direct operational and financial weight. Global market data reflects this growing preference clearly: quantitative fit testing holds a 55% share of the test type segment, outpacing qualitative methods as industries formalize their respiratory protection programs post-pandemic. Understanding the practical differences between qualitative and quantitative fit testing helps employers make informed procurement decisions rather than defaulting to the least expensive option, which may not satisfy regulatory requirements for their specific respirator types or workplace hazard levels.

Quantitative Fit Testing (QNFT) Equipment

Quantitative Fit Testing represents the more technically rigorous category of respirator fit testing equipment, and it accounts for 55% of the fit testing market by test type, reflecting strong industry preference for objective, instrument-based measurement over sensory-based approaches.

The most widely used QNFT instrument is the TSI PortaCount, which operates using an Ambient Aerosol Condensation Nuclei Counter (CNC) protocol. The instrument simultaneously samples particle concentrations both inside the respirator facepiece and in the surrounding ambient air, then calculates a numerical Fit Factor score by comparing the two readings. A higher Fit Factor indicates a tighter, more protective seal. Because the result is a precise number rather than a pass or fail impression, it eliminates the subjective interpretation that qualitative methods inherently carry. According to QNFT guidance published by VestMed, the CNC protocol is the most common in practice due to its versatility across multiple respirator types and testing modes.

An important alternative platform is the OHD Quantifit, which uses Controlled Negative Pressure (CNP) technology rather than ambient aerosol counting. Instead of sampling particles, the CNP method measures the leak rate at a controlled negative pressure applied to the facepiece interior. This makes the Quantifit functionally independent of the surrounding aerosol environment, a significant practical advantage in clean rooms, pharmaceutical manufacturing facilities, and other low-particle settings where the PortaCount would struggle to find sufficient ambient particles to generate a valid reading.

Under CSA Z94.4, the applicable Canadian standard governing respirator selection and use, a passing Fit Factor for a half-face respirator is typically 100 or greater. Full-face respirators require a Fit Factor of 500 or greater, reflecting their higher Assigned Protection Factor and the more demanding environments in which they are deployed. These thresholds are not arbitrary; they are calibrated to each respirator class's protective performance, and failing to meet them means the worker's actual exposure reduction cannot be reliably guaranteed.

Organizations considering purchasing QNFT equipment outright should carefully account for the full operational commitment involved. The instruments require regular calibration per manufacturer specifications, and calibration records must be maintained as part of a formal respiratory protection program. Operators must be trained, software and consumables must be managed, and administrative systems must track individual worker test results, recertification schedules, and equipment service history. This represents a substantial capital and ongoing administrative burden, particularly for smaller employers.

The objectivity and digital recordkeeping capabilities of QNFT systems make them the preferred method for healthcare, pharmaceutical, and industrial clients where compliance documentation is subject to third-party audit. As noted by OSHA's fit testing guidance, QNFT is required in any situation where a respirator must achieve a fit factor greater than 100, and the structured data output these instruments produce provides the kind of auditable evidence trail that regulatory inspections and workplace safety programs demand. For many organizations, partnering with a qualified fit testing service provider is a practical alternative to bearing that infrastructure burden in-house.

Qualitative Fit Testing (QLFT) Equipment

Qualitative Fit Testing kits operate on a straightforward sensory challenge principle. During testing, a worker dons a loose-fitting hood over their respirator while a nebulizer disperses a chemical agent into the enclosed space. The two most widely used agents are saccharin, which produces a detectable sweet taste, and Bitrex (denatonium benzoate), which produces a distinctly bitter taste. The worker then performs a standardized sequence of exercises including normal breathing, deep breathing, head side-to-side and up-and-down movements, and speaking, each lasting approximately one minute. If the worker detects the taste of the challenge agent at any point, the test is a fail, indicating the respirator seal is inadequate for that individual.

A critical regulatory boundary governs where QLFT is legally appropriate. Because the method relies entirely on sensory detection rather than measured particle counts, it is only valid for respirators with an Assigned Protection Factor (APF) of 10 or less. In practical terms, this restricts QLFT to filtering facepiece respirators such as N95s and half-mask elastomeric respirators used in lower-hazard environments. Full-face respirators and scenarios where worker exposure exceeds 10 times the permissible exposure limit require quantitative methods. Per OSHA's standard interpretation on when to use quantitative and qualitative fit testing, this distinction has been firmly established in regulatory guidance for decades.

From an accessibility standpoint, QLFT kits offer a meaningful cost advantage. Complete kits are commercially available at a fraction of the price of QNFT instruments, and operator training requirements are comparatively minimal. This makes QLFT a practical entry point for small employers or organizations that conduct testing infrequently.

However, the subjective nature of QLFT is a significant liability concern. A worker with reduced taste sensitivity, test anxiety, or a borderline seal may produce an inaccurate result in either direction. A peer-reviewed comparison study published via PubMed found that QLFT and QNFT do not consistently yield concordant results across commonly used healthcare respirators, raising real questions about test reliability. As the VestMed QLFT compliance guide notes, the method produces no numerical leakage data, only a binary pass or fail outcome with no measurable margin of safety.

CSA Z94.4 permits QLFT in appropriate contexts, and it remains a compliant option for N95 fit testing across many workplaces in Ontario. That said, regulated employers in healthcare and pharmaceutical settings are increasingly transitioning to QNFT to produce instrument-generated, numerically verifiable records that hold up under Ministry of Labour audits and internal compliance reviews.

Which Respirator Types Require Fit Testing?

Not every respirator worn on a job site or in a clinical setting requires formal fit testing, but understanding which types do, and which methods apply, is critical for maintaining compliance under CSA Z94.4 and Ontario's occupational health regulations.

N95 Filtering Facepiece Respirators

N95 filtering facepiece respirators represent the most commonly fit-tested respirator type in Ontario. They are required across healthcare settings for infectious disease exposure, construction environments with fine particulate and silica dust, manufacturing operations, and any workplace presenting biological or airborne hazards. Because the N95's protective function depends entirely on achieving an adequate facial seal, both qualitative and quantitative methods are acceptable for this class, provided the assigned protection factor is within the validated range. Given the widespread use of N95 respirators across corporate and institutional settings, they account for the largest volume of individual fit testing sessions conducted each year.

Half-Face and Full-Face Elastomeric Respirators

Half-face elastomeric respirators, used heavily in industrial applications, spray painting, and chemical handling, also require formal fit testing before use. Either QLFT or QNFT may be applied depending on the protection factor assigned to the specific device. Full-face elastomeric respirators, which extend coverage to include eye protection against higher-hazard substances such as toxic vapours and concentrated particulates, carry a more stringent standard. These devices must be validated using quantitative fit testing procedures capable of confirming a Fit Factor of 500 or greater, a threshold that qualitative methods cannot reliably verify. For these higher-hazard applications, instrument-based testing is the only compliant path forward.

PAPRs and the Fit-Test Exemption

Powered Air-Purifying Respirators equipped with loose-fitting hoods or helmets operate on a fundamentally different protective principle. Their positive-pressure design continuously forces filtered air outward, eliminating the facial seal dependency that makes fit testing necessary for tight-fitting respirators. As a result, loose-fitting PAPRs do not require fit testing, making them a practical alternative in clinical environments where workers cannot achieve a reliable seal due to facial hair or anatomical variation.

Why Individual Testing Cannot Be Skipped

Perhaps the most important principle governing respirator fit testing is that no single model fits all workers. Facial geometry, bone structure, and soft tissue variation mean two workers performing identical tasks in the same environment may require entirely different mask models or sizes to achieve a passing Fit Factor. A respirator can carry the correct certification for a hazard and still fail to protect the individual wearing it if the fit is inadequate. This reality makes individualized testing non-negotiable, regardless of whether a worker has worn the same respirator model for years. Retesting is also required whenever physical changes occur, including significant weight change or dental procedures that alter facial structure, reinforcing that fit testing is an ongoing compliance process rather than a one-time administrative checkbox.

How Often Must Respirator Fit Testing Be Repeated?

Under CSA Z94.4, employers must ensure that fit testing is repeated on a scheduled basis for every worker relying on a tight-fitting respirator as part of a formal respiratory protection program. The standard establishes a recurring testing interval to account for the natural changes that occur in a worker's facial structure over time, as well as variations in how respirators perform after extended use. Regardless of whether a worker continues using the same mask model they were previously tested with, that scheduled retesting obligation remains in force. Compliance is not contingent on whether the worker feels their respirator still fits well; subjective assessments are not an acceptable substitute for documented, instrument-based or sensory-challenge testing conducted by a qualified tester.

Beyond the scheduled retesting interval, several specific events trigger an immediate requirement for repeat fit testing. Any significant change in facial structure can compromise the integrity of a respirator's face seal, including substantial weight loss or gain, dental procedures such as tooth extractions or the fitting of dentures, facial scarring from injury, or reconstructive surgery. These changes alter the geometry of the seal area in ways that can render a previously passing fit test invalid, even if the respirator model remains unchanged. Workers should be aware that reporting these changes to their supervisor or occupational health coordinator is part of their responsibility under a compliant respiratory protection program.

A change in respirator model or size is another independent trigger for retesting, one that is frequently overlooked. Fit tests are conducted on a specific make, model, and size combination. If a worker transitions to a different respirator, even one from the same product family or protection class, a new fit test must be completed before the new respirator is used in a hazardous environment. You can find a detailed breakdown of how mask fit tests are conducted for employees to better understand what that process involves in a workplace setting.

Record-keeping obligations are equally non-negotiable. Employers must maintain a fit test record for each worker that includes the test date, the specific respirator make, model, and size, the method used (QNFT or QLFT), the fit factor achieved, and the name of the qualified tester. CSA Z94.4-18 introduced a standardized fit testing record form in Annex R to support consistent documentation practices across industries. Incomplete or outdated records are among the most frequently cited deficiencies found during Ontario Ministry of Labour respiratory protection program inspections. A compliance order can be issued for inadequate recordkeeping even in workplaces where workers are otherwise wearing appropriate respirators, making documentation a substantive legal obligation rather than an administrative formality.

What Happens If a Worker Fails a Fit Test?

A failed fit test is not a verdict on the worker; it is a verdict on the mask. When a quantitative result falls below the required Fit Factor threshold or a qualitative test produces a detected challenge agent, the data is telling you that the specific respirator model, size, or style tested does not form an adequate seal against that individual's facial geometry. Facial structure varies significantly from person to person, and no single respirator model fits every face. The failed result simply means the search for the right mask-to-face combination must continue before that worker can be permitted to enter any hazardous environment requiring respiratory protection.

The Immediate Next Step: Systematic Retesting

The standard protocol following a failure is methodical and straightforward. The worker is retested using a different respirator model, a different size within the same model line, or an alternative facepiece style. This process repeats until a passing Fit Factor is achieved. Under quantitative protocols, the numerical thresholds are defined: a minimum Fit Factor of 100 is required for half-face respirators, and a minimum of 500 is required for full-face respirators. Each alternative trialed must be formally fit tested in full; a visual check or a brief user seal check does not substitute for a complete test. Employers should maintain a selection of approved respirator models in various sizes specifically to support this retesting workflow.

Escalation When N95 Models Consistently Fail

If a worker fails on multiple N95 disposable models, escalation to a different respirator category is the appropriate next step. A half-face or full-face elastomeric respirator often provides a more customizable fit, with adjustable straps and a wider range of sizes that can accommodate facial geometry that disposable facepieces cannot. Where the hazard control hierarchy permits and the specific exposure warrants it, a powered air-purifying respirator with a loose-fitting hood or helmet is an alternative worth considering, as loose-fitting PAPRs do not rely on a facial seal and therefore do not require fit testing in the same manner.

Documentation and Duty of Care

Every failed attempt must be recorded in the worker's fit test record, including the respirator make, model, size, and the Fit Factor result obtained. This documentation serves two purposes: it supports a systematic search for an appropriate solution, and it demonstrates that the employer exercised a genuine, good-faith effort to protect the worker. Respiratory protection consistently ranks among the most frequently cited occupational safety violations, making complete records an essential defence during any compliance audit or inspection.

Workers who cannot achieve a passing result on any available tight-fitting respirator must not be assigned to tasks requiring respiratory protection until either an engineering control reduces the hazard below the level requiring a respirator, or an alternative respiratory protection solution is implemented. This obligation falls directly on the employer under Ontario's duty of care framework. Assigning an unprotected worker to a hazardous task is not a compliant interim measure; it is a liability.

Who Needs Respirator Fit Testing in Ontario?

Healthcare Workers

Healthcare workers in hospitals, long-term care facilities, and community health settings across London and the GTA represent the single largest demand segment for fit testing services. Airborne pathogen protocols, reinforced significantly during the COVID-19 pandemic, have made respirator fit testing a routine and non-negotiable component of infection prevention programs. Healthcare and pharmaceutical sectors combined account for 30% of global industry demand for fit testing services, reflecting the volume and consistency of compliance requirements in clinical environments. Every nurse, respiratory therapist, or support worker entering an airborne isolation room must wear a verified, properly fitted respirator before patient contact begins.

Construction Trades Workers

Construction sites present some of the most complex airborne hazard profiles of any Ontario workplace. Workers face routine exposure to silica dust, asbestos fibres, mould, chemical vapours, and welding fumes, all of which are regulated substances under Ontario Reg. 833. Before any worker wears a tight-fitting respirator on a regulated job site, a documented fit test must be completed and on record. Common compliance failures in this sector include skipping required testing cycles and using an incorrect testing method for the respirator type in use. Employers operating active construction sites in London, the GTA, and across Ontario carry direct legal accountability for these gaps.

Manufacturing and Industrial Facilities

Manufacturing facilities where workers are routinely exposed to chemical vapours, metal fumes, welding smoke, or fine particulates fall squarely within the scope of OHSA respiratory protection program requirements. A respirator that has not been formally fit tested offers no reliable protection against occupational exposure, regardless of its certification. Employers in this sector face Workers' Compensation liability and OHSA penalties when fit testing requirements are unmet or inadequately documented.

First Responders and Emergency Services

Firefighters, paramedics, and emergency response personnel require verified respirator fits for hazardous material incidents, confined space rescues, and mass casualty events involving airborne hazards. The stakes in these environments are acute and immediate, making documentation failures particularly serious.

The Governing Trigger for All Sectors

Any Ontario employer whose risk assessment determines that engineering controls alone cannot reduce airborne exposures below regulated occupational exposure limits (OELs) is legally required to implement a full respiratory protection program. Fit testing is a mandatory element of that program, without exception.

Should Your Organization Buy Equipment or Book a Fit Testing Service?

For most organizations, the decision to purchase respirator fit testing equipment versus contracting a professional service comes down to one factor: testing volume. Entry-level quantitative fit testing instruments, including the widely used TSI PortaCount series, typically land between $7,000 and $12,000 CAD once the base unit, carrying kit, and essential accessories are accounted for. That figure does not yet include calibration kits, proprietary software licenses, or the consumables required to operate the equipment, such as reagent-grade isopropyl alcohol and metal grommets. For organizations running continuous, high-volume fit testing programs across large worker populations, that capital investment can be amortized to a reasonable per-test cost over time. For everyone else, the math rarely works in favor of ownership.

The true cost of in-house equipment extends well beyond the purchase price. QNFT instruments require annual factory calibration, a recurring service fee that must be budgeted separately each year. A trained operator must administer every test, and that individual requires formal training to produce results that are legally defensible under Ontario's Occupational Health and Safety Act. Consumable supply chains must be actively managed to ensure testing is never interrupted. Administrative overhead adds further cost, as fit testing records must be maintained in a format that satisfies Ministry of Labour inspection requirements. None of these ongoing costs typically appear in initial procurement discussions, which means organizations consistently underestimate the true cost-per-test of an in-house program.

Organizations with annual or episodic testing needs achieve significantly better economics by outsourcing. This includes the majority of Ontario employers outside of large hospital systems or major industrial operations. A contracted professional fit testing service consolidates equipment, operator expertise, and compliance documentation into a single, predictable engagement. The employer receives defensible records aligned with CSA Z94.4 requirements without carrying the burden of equipment ownership, calibration scheduling, or operator management.

Forest City First Aid provides mobile, on-site N95 mask fit testing for corporate clients across London, the GTA, and throughout Ontario. Workers are tested at their own facility, eliminating lost productivity from travel. Every test produces compliance-ready documentation that meets CSA Z94.4 and OHSA recordkeeping standards. For organizations seeking a straightforward, audit-ready solution, contacting Forest City First Aid directly is the practical next step.

The Growing Demand for Fit Testing Across Ontario Industries

The global respirator fit tester market tells a compelling story about where occupational health priorities are heading. Valued at USD $354.42 million in 2026 and forecast to reach USD $723.7 million by 2036 at a 7.4% compound annual growth rate, this market expansion is not speculative. It reflects sustained, compliance-driven procurement investment across healthcare, pharmaceutical, construction, and industrial sectors. Quantitative fit testing already commands 55% of the test-type market share, and healthcare and pharmaceutical employers collectively account for 30% of total industry demand. For Ontario employers, these figures are not abstract; they represent a widespread shift in how organizations treat respirator protection, moving from informal practice toward documented, enforceable programs.

Post-pandemic regulatory formalization is a central driver of this growth. During the COVID-19 pandemic, many Ontario organizations rapidly deployed N95 respirators and developed respirator programs under emergency conditions, with limited attention to formal fit testing protocols. Provincial occupational health legislation and CSA Z94.4 have since made clear that those programs must now meet full compliance standards, including documented fit testing for every worker relying on a tight-fitting respirator. Organizations that once operated on informal assumptions are now facing concrete obligations, and the demand for professional fit testing services has grown accordingly.

The shift toward quantitative, digitally documented fit testing is accelerating this investment. Regulated employers, particularly in Ontario's healthcare and pharmaceutical sectors, are prioritizing audit-ready records that qualitative methods cannot reliably produce. Instrument-based testing generates numeric fit factors and calibration records that withstand Ministry of Labour scrutiny in a way that sensory-response protocols cannot.

Enforcement activity has also expanded well beyond healthcare. Construction, food processing, and light manufacturing operations across Ontario that previously operated without documented respirator programs are increasingly subject to inspection and accountability. This expansion of oversight is generating new demand for third-party fit testing services from employers who lack in-house testing capacity.

For organizations in London, the GTA, and throughout Ontario, the combination of intensifying enforcement, post-pandemic compliance obligations, and growing workforce awareness of respiratory hazard rights means fit testing program investment has become both a legal necessity and a risk management priority that will only increase in significance through 2026 and beyond.

What to Expect from a Professional Fit Testing Session with FCFA

Forest City First Aid uses calibrated quantitative fit testing equipment to produce objective, numerical Fit Factor results for every worker tested. Unlike qualitative methods that depend on a worker's sensory response, quantitative testing measures the actual concentration of particles outside versus inside the respirator seal, generating a defensible numerical result. Each result is benchmarked against the minimum passing thresholds established under CSA Z94.4, which require a Fit Factor of at least 100 for half-face respirators and 500 for full-face respirators. Should a Ministry of Labour inspection ever review your respiratory protection program, those documented results provide the evidence-based record your organization needs.

One of the most practical aspects of FCFA's service is the availability of on-site testing at your facility. Workers do not need to travel to an external location, and testing can be integrated directly into existing shift schedules or clinical workflows, keeping operational disruption to a minimum. FCFA serves corporate clients in London, Toronto, and across the broader GTA, and is available to travel to locations throughout Ontario for group bookings.

Documentation is provided for every worker tested. Each fit test record captures the respirator make, model, and size; the test method used; the Fit Factor achieved; and the date of testing. These records slot directly into your respiratory protection program files, giving your safety team or HR department the organized, compliant documentation required for internal audits and regulatory review.

For organizations testing multiple workers, FCFA offers group and corporate scheduling with flexibility built in to accommodate rotating shifts, multi-department testing needs, and specialized clinical environments. Scheduling is designed to move efficiently through larger groups without creating backlogs or safety gaps in coverage.

FCFA's team also brings occupational health and safety expertise that extends beyond administering the test itself. For any worker who does not achieve a passing Fit Factor on their initial test, the team can recommend and assess alternative respirator models on the spot, identifying a compliant option without requiring a separate appointment. This significantly reduces the follow-up workload for your safety coordinator or HR team and keeps your program on schedule.

Conclusion: Getting Fit Testing Right in Ontario

Respirator fit testing is a legal obligation for Ontario employers, not a discretionary safety measure. OHSA and CSA Z94.4 set clear, enforceable standards, and non-compliance carries real consequences for both workers and organizations. Selecting the right testing method, whether quantitative or qualitative, and knowing which respirator types require formal testing are foundational decisions that shape every element of your respiratory protection program.

Ongoing compliance is not a one-time event. Annual recertification, trigger-event retesting, and thorough recordkeeping are continuous responsibilities that demand a consistent, documented process. Organizations that treat fit testing as a checkbox exercise rather than a structured program create compliance gaps that regulators and auditors will find.

For most Ontario employers, partnering with a professional fit testing service delivers better outcomes at lower cost than managing equipment ownership, calibration, and operator training in-house. Forest City First Aid provides on-site fit testing services across London, the GTA, and throughout Ontario, delivering compliance-ready documentation, calibrated quantitative results, and expert support at every step. Contact FCFA today to schedule fit testing for your team.