Items |
Induction heating |
Coal-fired heating |
Gas-fired heating |
Resistance heating |
Heating efficiency |
98% |
30-65% |
80% |
Below 80% |
Pollutant emissions |
No noise, no dust, no exhaust gas, no waste residue |
Coal cinders, smoke, carbon dioxide, sulfur dioxide |
Carbon dioxide, sulfur dioxide |
Non |
Fouling (pipe wall) |
Non-fouling |
Fouling |
Fouling |
Fouling |
Water softener |
Depending on the quality of fluid |
Required |
Required |
Required |
Heating stability |
Constant |
Power is decreased by 8% yearly |
Power is decreased by 8% yearly |
Power is decreased by more than 20% yearly (high power consumption) |
Safety |
Electricity and water separation, no electricity leakage, no radiation |
Risk of carbon monoxide poisoning |
Risk of carbon monoxide poisoning and exposure |
Risk of electricity leakage, electric shock or fire |
Durability |
With core design of heating, 30 years service life |
5 years |
5 to 8 years |
Half to one year |