| 摘要 |
The present invention concerns a double tubing condensation exchanger (1) for heating water and/or for producing sanitary hot water, characterized in that it provides a first coil (2) with a plain surface and a second coil (3) with a corrugated surface, provided in parallel each other, said first (2) and second (3) coils being spiral wound, a thermal carrier fluid circulating, independently, inside said first and second coil, said first (2) coil exchanging heat with combustion fumes mainly by irradiation and convection, and said second coil (3) exchanging heat with combustion fumes mainly by condensation. |
