Hello Lime 4x4
Yes I use 2 coal stoves to heat a single story ranch. 1 is a Harman ss2600 located in the cellar, this is the second season with that. Previously I had several different manual type coal stoves down there. Upstairs now is a Harman mark 2 which this will be the 3rd season on that. Been heating with coal exclusively for 25 yrs.
The ss2600 is a triple fuel furnace which is doing good so far.