I have hot water baseboard heat and an EKO Boiler hooked up to my regular furnace. This morning I notice black soot on the wall behind the base board. My baseboard is the copperpipe with the fins.The black soot was in line with the fins. I thought hot water baseboard is sealed. How can the soot come out from the baseboard?
What should I do? This has never happened before. I hooked up the EKO boiler to my furnace back in January of this year. Any suggestions would be apprecated