Approached for "emergency" heating in 1 floor. house when turning off the lights and the main 220v pump. The pump had enough power to supply water to the expansion tank of the open system 2m up. Konesh has nothing to compare with a normal pump . but when this is working, the system is fully functional, the boiler turns on, albeit less often. Tested at 12 volts 2 times + - 4 hours.
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