HEATING UNIT FOR HOT-WATER BOILER WORKING ON LIQUID FUEL OR ON GAS AND MODULES FOR REALIZATION OF SUCH HEATING UNIT

摘要

hot-water boilers working on liquid fuel or gas. SUBSTANCE: heating unit has casing which is duplicated with shell inside its rear zone; circular transversal fins between shell and casing are provided for forming circular transversal passages where gaseous combustion products pass in parallel trajectory before leaving this heating unit. EFFECT: enhanced heat exchange between gaseous combustion products and water to be heated. 20 cl, 8 dwg