What Is the CSA B365 Standard and Why Does It Matter for WETT Inspections?

If you're planning a WETT inspection or installing a wood-burning appliance, you’ve likely come across the term CSA B365—but what does it mean, and why is it important?

What Is the CSA B365 Standard?

CSA B365 is a Canadian standard that provides guidelines for the safe installation, operation, and maintenance of solid fuel-burning appliances and systems. This includes wood stoves, fireplaces, pellet stoves, chimneys, and flue pipes.

It covers key safety requirements such as:

• Clearances to combustible materials

• Chimney and flue design

• Appliance installation and anchoring

• Proper venting and airflow

• Ongoing maintenance expectations

How Is CSA B365 Used in a WETT Inspection?

WETT inspectors use the CSA B365 standard as their primary reference when evaluating whether a solid-fuel system appears to meet safety expectations. During your inspection, the system will be assessed based on:

• Visible compliance with installation rules outlined in CSA B365

• Safe clearances, proper venting, and approved components

• Signs of wear or unsafe modifications

• Overall system condition and maintenance

While a WETT inspection doesn’t offer formal code enforcement, it follows CSA B365 to identify safety issues and guide recommendations in the report.

Do I Need to Comply With CSA B365?

Yes—most insurance providers and building authorities require compliance with CSA B365 for wood-burning appliances. If your installation doesn’t follow this standard, you may face:

• Higher insurance premiums

• Denial of coverage

• Safety hazards or costly repairs

What This Means for Homeowners

Whether you're installing a new stove or updating your insurance, understanding CSA B365 gives you a clearer view of what’s required—and how a WETT inspection fits into the process.

At BC WETT, we reference CSA B365 in every report to help you stay safe, informed, and properly documented.