1. Self-check during working, self-diagnosis and malfunction indicated.
2. European type gas proportional adjustment, accurate temperature.
3. Anti-electromagnetic interference device, working more stable.
4. Using oxygen-free copper heat exchanger, to have much higher heating efficiency
5. Coaxial flue exhaust smoke, to be more safe.
6. 36 kinds of safety protection function, to be more safe and reliable
7. Three-level anti-freeze function, safe operation at low temperature
8. Low water pressure start, regard less of low water pressure and floor height.