central verwarmingsinrichting with a kettle and a warmteuitwisselaar for additional heating of the boiler terugstromende medium

摘要

The central heating gas boiler is provided with a hearth (1), a first heat exchanger (3), a smoke-gas collecting box (4) and a second heat exchanger (11) which is arranged in this box, flowed around by the smoke gas and connected in the water return line (12). As a result, the space available to the second heat exchanger can easily be increased or reduced and a simple adaptation to the conditions of the boiler can take place. IMAGE