Document fuel type, appliances, nameplates and detector locations without dismantling the system.
V17 — specialized system
Gas, combustion and appliances
Coordinate supply, shutoff, venting, combustion air, detectors and appliances without treating a regulated system as ordinary DIY.
Checked: 2026-08-22
A new hood, appliance change or tighter house can affect available air and draft.
Gas odour, CO, combustion abnormality or piping alteration: leave/secure as appropriate and use the required professional.
Useful tools / data
- Nameplates and manuals
- Appliance/vent map
- Maintenance history
What the professional checks
- Verify capacity and fuel supply
- Test combustion, draft and venting
- Confirm combustion air and interlocks
Sources and limits
Rules vary by jurisdiction and scope. Regulated, structural and gas work remains with the required professional.
V15
Remaining system checks not to miss
V15 covers issues that can block a project, cause a loss or become expensive once concealed.
Advanced systems and special cases
Checks that change sequencing, risk or which professionals must be coordinated.
Hidden systems and critical interfaces
These checks target costly problems that often appear only after opening assemblies, conversions or changes of use.
Building interfaces to diagnose before enclosure or replacement
These tools connect structure, water, air, frost, wind and mechanical systems so repairs do not hide the cause.
Hidden details to verify before repair or enclosure
These diagnostics separate simple maintenance from measurement-first and conditions where structure, fire or services require professional review.
V29
Household safety and compliance details
V29 connects smaller risks that often fall between finishes, appliances, plumbing and local code.
V31
Commissioning and everyday safety
V31 helps verify systems after work and document the values that make a home safer to operate.