Pressure test conducted on the full gas pipework to detect leaks at any point in the installation.

Water heaters (esquentadores), boilers, cookers, and stoves — condition, connections, and correct operation verified.

Air supply openings, flue terminals, chimneys, and combustion gas evacuation pipes inspected.

Carbon monoxide measurement conducted per room with gas appliances. Silent killer — undetectable without instrumentation.

Findings graded at levels 1, 2, and 3 with recommended corrective actions and priority guidance per grade.

Legal compliance certificate issued same day. Full DGEG validity. Accepted by all gas distributors in Portugal.