Had a Charmaster wood/oil since 2005. I got talked into switching to gas (propane) forced air furnace (supposedly more green and efficient) in 2018. 2 yrs later the entire furnace clogged up with tarry soot due to low pressure shut off not functioning. Had to replace it 6/2021, 2 new gas furnaces out of pocket, not covered by warranty or insurance. I never should have gotten rid of my Charmaster. Now I'm looking to add on a wood furnace and connect to existing ductwork and original chimney. I can't decide whther to purchase a Royall 8150 or a Fire Chief? Does anyone have any advice or experience with these? Thanks for any helpful advice.