The best advice I can give you about a combination stove is get a coal stove that will burn wood.
Most coal stoves will burn wood but you can't burn coal in a wood only stove. A lot of the coal stoves will not be marked as being able to burn wood but that's because of EPA regulations. Besides once you start burning coal you'll not want to burn wood.
iowaboy.17 wrote:It has been sitting in a basement bin for several years but I don't think that affects the calorific value of it
It will burn, there was one post on here the guy had coal he estimated to be sitting there about 30 years if I remember correctly. It amy lose some over time but overall its negligible
iowaboy.17 wrote:that little stove won't hold the fire for more than two or three hours, so I am thinking coal will hold out a bit longer
You'll get a burn time a minimum of 12 hours on a moderate setting with most stoves. Most get a schedule of filling it in the morning and at night.