I understand the desire to burn both fuels......and with a hot air unit you just might make it work. Like the other guys, I don't like dual fuel rigs, but if you must, this is as good as any available.
Please keep the chimney in GREAT condition with a frequent brushing...and some coal fired days to help that out creosote issue.
If you wanted to burn in a hand fired dual fuel boiler unit, all of us would be SCREAMING at you to not do it. The lives of your family are just to important. Wood fired boilers unless a gasser just aren't for indoor use.
Argue all you want, there is absolutely no way I will change my mind......