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  1. accumech

    Black Soot on Rads, Walls, Ceilings

    DouginMB, there's no fireplace. That was one of the first thoughts, that perhaps there was a fireplace and the problems we're seeing were associated with it, but that's not the case. Good idea, though, thanks.
  2. accumech

    Black Soot on Rads, Walls, Ceilings

    Dlandissr, the btu input rating of the new heater is exactly the same as the old one. I suspected that during the removal, that the stack could have been damaged/not connected back up, but that is not the case. Not sure if soot is accumulating in the combustion chamber of the heater, I'll...
  3. accumech

    Black Soot on Rads, Walls, Ceilings

    Hey, thanks for the responses. ChrisConley, to answer some of your questions, there have been no exhaust fans added anywhere in the building. Absolutely nothing was changed/added/improved other than a hot water heater was changed out. The two hot water heaters are rated at 38,000 Btu/h input...
  4. accumech

    Black Soot on Rads, Walls, Ceilings

    Hi, I've encountered a problem that I need help with, here's what I've got: a duplex, built in the 50's. In the basement of one of the duplex's, there are two gas-fired hot water heaters servicing both unit's domestic hot water, and one gas-fired boiler servicing both unit's hot water...

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