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Everything You Need To Know About WETT Inspections

A WETT (Wood Energy Technology Transfer) inspection is a specialized inspection for wood-burning systems, such as fireplaces and wood stoves, to ensure they meet safety standards and regulations.

Here are some key points to know about WETT inspections:

Purpose of WETT Inspections

WETT inspections are designed to assess the safety and compliance of wood-burning systems.

These inspections are often required for insurance purposes, during property sales, or as part of a regular maintenance routine.

Qualified WETT Inspectors

WETT inspections should be conducted by qualified WETT inspectors who have received proper training and certification from WETT Inc. and have completed their continuing education hours.

Inspectors may hold different levels of certification:

WETT Level 1 Visual Inspection. This includes a basic inspection of the solid fuel burning appliance and visible venting system components. It will consist of measurements of clearances, opening doors or dampers, and a visual inspection of the chimney from the ground.

WETT Level 2 Technical Inspection.  This includes a basic inspection of the solid fuel burning appliance and visible venting system components. It will consist of measurements of clearances and opening doors or dampers, which may include taking apart flue pipes, opening clean-outs, entering the attic to view additional system components, and may involve accessing the chimney on the roof.

WETT Level 3 Invasive Inspection. This inspection would include an invasive review of components. It may include opening walls (drywall) or other tasks that require additional construction-related skills.

We go the extra step as I follow my Certified Master Inspector standards of practice. During the Wett Inspection, I will also open clean-outs and access the attic and roof.

Components Inspected

WETT inspections typically cover various components, including the condition of chimneys, flues, fireplaces, wood stoves, and other wood-burning appliances.

Inspectors assess the installation, clearances to combustible materials, venting systems, and overall safety of the wood-burning unit.

Compliance with Codes and Standards

The inspection ensures the wood-burning system complies with CSA (Canadian Standards Association) B365 and the National and Ontario building codes and safety standards.

Non-compliance may result in recommendations for repairs or modifications to bring the system up to code.

Insurance Requirements

Many insurance companies require WETT inspections to ensure that wood-burning systems pose minimal fire and safety risks.

Failure to comply with insurance requirements may result in policy cancellations or higher premiums.

Frequency of Inspections

The frequency of WETT inspections may vary depending on factors such as usage, type of wood-burning system, and local regulations.

Regular inspections are essential to identify and promptly address any potential safety issues.


WETT inspectors must provide detailed reports on the official WETT forms outlining the inspection findings, including any recommended repairs or modifications.

Proper documentation is important for insurance purposes, resale transactions, and maintaining a record of the wood-burning system's safety status.

Maintenance and Best Practices

Homeowners are encouraged to follow best practices for maintaining their wood-burning systems, including regular cleaning and proper use.

Compliance with manufacturer guidelines and local regulations is crucial to ensure ongoing safety.

Before scheduling a WETT inspection, verifying the inspector's qualifications and being aware of local regulations regarding wood-burning systems is essential.  Regular maintenance and compliance with safety standards help ensure the safe and efficient operation of wood-burning appliances.


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