1) Winter & Summer Switch
2) Automatic Igniton at extremely low water pressure
3) Lowest start-up water pressure:0.02MPA
4) With advanced flue outlet,inhaled duct and exhaust pipe
5) With completely sealed combustion chamber
6) With 20-minute timer
7) Flameout safety device
8) Dry burning protection device
9) Over-high wind pressure protection
10) Over-high water pressure protection
11) Electricity leakage protection
12) Air and gas linkage device
13) Anti-downdraught protection
14) Electric circuit overload protection
15) Anti-deflagration protection
16) Anti-frozen protection
17) ODS device optional
18) High efficiency and energy saving
19) Digital Displayer
20) Muti-protection safety device