Hot-water supply geyser - has duct which passes cold water through finned block and spiral pipe around combustion chamber

摘要

The hot-water geyser comprises a combustion chamber with a heat-exchanger connected between a cold-water feed and a water tap. A first section of the exchanger comprises a spiral pipe around the combustion chamber. This is connected in series with a finned block in the top of the chamber. The cold-water feed pipe (6) is connected to the finned block (5), so that water passes through this first, before flowing through the spiral pipe (4).