| 摘要 |
PURPOSE: A boiler having an electric heater and two stage water tanks is provided to reduce heating costs by heating a water tank in a second stage while moving waste heat through exhaust holes. CONSTITUTION: A boiler having an electric heater and two stage water tanks comprises horn-shaped holes and an air valve. Exhaust holes of the two-stage water tanks are assembled with the horn-shaped holes. Waste heat is discharged through the horn-shaped holes. The air valve is attached to the bottom edge of the water tank at a second stage to cut off the outflow of the waste heat. |
