advantages:
1. Inner wall anti-corrosion and covered by insulation to make sure the gas emitting stable and avoid dew point corrosion.
2. Outer wall as structural support to avoid flue corrosion and ensure safety.
3. There is an air gas between the insulation and outer wall, to increase the insulation and give enough space for axial movement of inner and outer tube shell
4. Ratio of height to diameter 40 to 1 is available as per customer requirement.
5. Over 23 years of experience in chimney manufacturing