Chapter 1
Do not test the system with a fire
An idle flue may contain nests, debris, damaged components or deposits, and building changes may have altered airflow. Lighting a small fire is not a safe substitute for inspection.
Chapter 2
Collect what is known
Identify the appliance, fuel, approximate idle period and any visible changes. Look from safe occupied areas only; do not climb onto the roof or dismantle venting.
- Manuals and service records
- Visible debris or water
- Animal sounds
- Renovations and new exhaust fans
- Alarm age and test status
Chapter 3
Arrange assessment before use
Ask which inspection scope fits the unknown history, whether the full vent route can be viewed, and what documentation you will receive. Follow property-specific advice before operating the appliance.
Field note: A fresh coat of paint or an open damper does not establish that the vent is clear or suitable for use.
