Three zone solar heating boiler - has heat exchangers and combustion chamber insert at different levels

摘要

The boiler has heat exchangers (5, 6, 7) and a combustion-chamber insert (1) mounted at different levels, to form three temperature zones. It can also incorporate a hot-water storage tank (3), heated by means of the transfer medium (4) to the temperatures of the individual zones. The flue of the insert can be passed through this tank. A pump (12) and thermostat (16) can be provided to control temp. in the central zone.