http://www.hearth.com/talk/threads/grannys-splitter-wood-pile.78935/ Granny's old wood/oil furnace was not very well built as it only lasted 35 years! The heat exchanger on the oil side had failed plus there were several places on the wood side where the metal was almost burnt through. This is the first section of the old chimney below the roof line and you can see that rain water had penetrated the mortar down into the building. The brick chimney was over 60 years old and the sand used in the mortar was beach sand and over time, the salt in the sand had broken down the mortar. The chimney was just a stack of bricks held together by their own weight. Taking the chimney apart was just a matter of lifting the bricks off. Elizabeth, my" GOOD" wife, assisted me through the entire project! The new chimney installed and water tight. The new furnace sitting where the old one sat. I did not like the long smoke pipe run so some duct work would have to be moved. Furnace and duct work moved. Part of the new duct work in place. Cold air return installed on the fan and filter housing. Finished and now waiting for the Wett Inspector. Wett inspection passed! The first Fire!