Dan is your house a conventional 8 or 9 ft flat ceiling with access to the roof space?
Does your slow combustion easily heat the living area or does it just do it?
Do you use it as slow combustion heaters are best, buning gently 24 hrs or just light it and expect instant heat?
If you answered yes to these a good simple and surprisingly effective way to move the heat is put a ceiling
register in the living area and one in each of the bedrooms conected with ordinary ducting.
Say 8" fom the living then divided and stepped down to 6" in the bedrooms.
Natural convection will move the warm air gently to the bedrooms and cooler air will return to the living.
You will be surprised how well this works.
Comercial setups are available which put a fan in the system but they can work quite well without it.
Don't expect a blast of heat as if you turned on a gas or electric heater but it will gently raise the temp.
And best of all this is really cheap
Greolt