If the clay is is good shape and the chimney was built correctly yes. Clay is still the best liner for coalHi -- I'm interested in what you say here about the creosote and corrosion. I got a vintage Tirolia stove (kitchen/heat/water) that is coal burning. Am wanting to swap out a propane heater (since propane is getting so $$$$$) that is vented into a clay-lined flue. Currently, the propane unit is the only thing in this flue, however, previously an oil furnace, propane water heater, and very old wood stove were all in this same flue. Can I hoook up the coal stove without putting in a stainless liner?