1. Burner inspection

We check fuel, air, flame, and basic operation.

2. Flue gas measurement

We measure temperature, O₂/CO₂, CO, and draft.

3. Boiler inspection

We check surface cleanliness and signs of soot or condensate.

4. Flue and chimney inspection

We check for airtightness, obstructions, corrosion, and proper outlet.

Goal

To treat the system as a unified whole rather than just the burner or just the chimney.