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Replace Chimney with what type of vent
My house was built in 1910, the chimney (small) has had it, I'm planning on tearing it down to the basement. Its in bad shape all the way down. I only need to vent the Oil furnace. What type of vent pipe (an size) should be installed ? Ive searched and cant seem to find anything specific - dual wall, same size pipe that exits the furnace ? Prior owners went thru less then a tank of oil a season - I'm in MA. I'm planning on installing a wood stove & building a DIY solar heating system. So the oil heat will get less use. No gas to the house. I need to replace the roof by Winter, so planning on replacing the chimney as a vent at that time. Thank you - Dave