I think its only as dangerous as the person operating it. wood, you won't have any problems.
I used to live in a older 14 x 40 foot trailer house for seven years, heated it with a wood circulator stove, followed all of my home insurance reqiurements, all went well, that's when I learned to sleep lightly since then & my sense of smell improved greatly.
Brought that same wood heater to my current home over thirty yeats ago, upgraded to a regular indoor wood furnace five years later, got tired of throwing all that mess down into the basement every year, finally upgraded to a OWF 14 years ago installed it in enclosed shed, again followed my home owners insurance requirements.
After all these years, I still sleep lightly, take burning wood very seriously & with respect. I have a large fire extinguisher in my garage, & a hose on a reel in my basement with quick hose access through basement wall. With the grace of Almighty, I have never come near of needing these precautionary gear.
oaky