| 摘要 |
PURPOSE: A low-energy hot water heating system is provided to save energy by reducing the amount of circulating how water. CONSTITUTION: A low-energy hot water heating system comprises a hot water circulation sheet, a supply circulation pipe(20) and a U-turn pipe(30). The hot water circulation sheet has a plurality of hot water holes in a longitudinal direction. The supply circulation pipe comprises a first insertion hole, a third connection hole, and a plurality of first hot-water returning hole. A plurality of hot-water returning hole is formed in a width direction in a row. |
